These refinements augment and enhance Ruby primitives so you can avoid monkey patches. They also allow you to develop clean and concise implementations while using less code. By refining your code, you can acquire the functionality you wish the core primitives had!
- Features
- Requirements
- Setup
- Usage
- Requires
- Using
- Examples
- Array
- Binding
- Data
- DateTime
- Hash
- .infinite
- .with_default
- #compress
- #compress!
- #deep_merge
- #deep_merge!
- #deep_stringify_keys
- #deep_stringify_keys!
- #deep_symbolize_keys
- #deep_symbolize_keys!
- #diff
- #fetch_value
- #flatten_keys
- #flatten_keys!
- #many?
- #recurse
- #stringify_keys
- #stringify_keys!
- #symbolize_keys
- #symbolize_keys!
- #transform_value
- #transform_value!
- #transform_with
- #transform_with!
- #use
- IO
- LogDevice
- Logger
- Module
- Object
- Pathname
- String
- String IO
- Struct
- Symbol
- Development
- Tests
- License
- Security
- Code of Conduct
- Contributions
- Developer Certificate of Origin
- Versions
- Community
- Credits
Enhances the following objects:
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Array
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Binding
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Data
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DateTime
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Hash
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IO
-
LogDevice
-
Logger
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Module
-
Object
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Pathname
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String
-
StringIO
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Struct
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Symbol
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Ruby.
-
A solid understanding of refinements.
To install with security, run:
# 💡 Skip this line if you already have the public certificate installed.
gem cert --add <(curl --compressed --location https://alchemists.io/gems.pem)
gem install refinements --trust-policy HighSecurityTo install without security, run:
gem install refinementsYou can also add the gem directly to your project:
bundle add refinementsOnce the gem is installed, you only need to require it:
require "refinements"If no refinements are desired, then add the following to your Gemfile instead:
gem "refinements", require: false…then require the specific refinement, as needed. Example:
require "refinements/array"
require "refinements/binding"
require "refinements/data"
require "refinements/date_time"
require "refinements/hash"
require "refinements/io"
require "refinements/log_device"
require "refinements/logger"
require "refinements/module"
require "refinements/object"
require "refinements/pathname"
require "refinements/string"
require "refinements/string_io"
require "refinements/struct"
require "refinements/symbol"Much like including/extending a module, you’ll need to modify your object(s) to use the refinement(s):
class Example
using Refinements::Array
using Refinements::Binding
using Refinements::Data
using Refinements::DateTime
using Refinements::Hash
using Refinements::IO
using Refinements::LogDevice
using Refinements::Logger
using Refinements::Module
using Refinements::Object
using Refinements::Pathname
using Refinements::String
using Refinements::StringIO
using Refinements::Struct
using Refinements::Symbol
endThe following sections demonstrate how each refinement enriches your objects with new capabilities.
Answers if an array is equal to another array when the elements are equal but in any order and/or subset.
example = %w[a b c]
example.combinatorial? %w[a b c] # true
example.combinatorial? %w[c a b] # true
example.combinatorial? %w[c] # true
example.combinatorial? %w[c b] # true
example.combinatorial? %w[x] # false
example.combinatorial? %w[z b c] # false
example.combinatorial? %w[a b c d] # false
example.combinatorial? [] # falseRemoves nil and empty objects without mutating itself. Answers itself if there is nothing to remove.
object = Object.new
example = [1, "blueberry", nil, "", [], {}, object]
[].compress # []
[1, 2].compress # [1, 2]
example.compress # [1, "blueberry", object]
example # [1, "blueberry", nil, "", [], {}, object]Removes nil and empty values while mutating itself. Answers nil if there is nothing to remove.
object = Object.new
example = [1, "blueberry", nil, "", [], {}, object]
[].compress! # nil
[1, 2].compress! # nil
example.compress! # [1, "blueberry", object]
example # [1, "blueberry", object]Removes given array or elements without mutating itself.
[1, 2, 3, 4, 5].excluding [4, 5] # [1, 2, 3]
[1, 2, 3, 4, 5].excluding 4, 5 # [1, 2, 3]Answers the first element which evaluates to true from a filtered collection.
handlers = [
-> object { object if object == :b },
proc { false },
-> object { object if object == :a }
]
handlers.filter_find # Enumerator::Lazy
handlers.filter_find { |handler| handler.call :a } # :a
handlers.filter_find { |handler| handler.call :x } # nilAdds given array or elements without mutating itself.
[1, 2, 3].including [4, 5] # [1, 2, 3, 4, 5]
[1, 2, 3].including 4, 5 # [1, 2, 3, 4, 5]Inserts additional elements, or an array, between all members of given array.
[1, 2, 3].intersperse :a # [1, :a, 2, :a, 3]
[1, 2, 3].intersperse :a, :b # [1, :a, :b, 2, :a, :b, 3]
[1, 2, 3].intersperse %i[a b c] # [1, :a, :b, :c, 2, :a, :b, :c, 3]Answers true if an array has more than one element. Can take a block which evaluates as truthy or falsey.
[1, 2].many? # true
[1, 2, 3].many?(&:odd?) # true
[1].many? # false
[].many? # falseAnswers the maximum extracted value from a collection of objects.
Point = Data.define :x, :y
points = [Point[x: 1, y: 2], Point[x: 0, y: 1], Point[x: 2, y: 3]]
points.maximum :x # 2
points.maximum :y # 3
points.maximum :z # undefined method `z' for #<data Point x=1, y=2> (NoMethodError)
[].maximum :x # nilAnswers mean/average all elements within an array.
[].mean # 0
[5].mean # 5
[1, 2, 3].mean # 2
[1.25, 1.5, 1.75].mean # 1.5Answers the minimum extracted value from a collection of objects.
Point = Data.define :x, :y
points = [Point[x: 1, y: 2], Point[x: 0, y: 1], Point[x: 2, y: 3]]
points.minimum :x # 0
points.minimum :y # 1
points.minimum :z # undefined method `z' for #<data Point x=1, y=2> (NoMethodError)
[].minimum :x # nilAnswers new array padded with given value up to a maximum size. Useful in situations where an array needs to be a specific size with padded values.
["a"].pad 0 # ["a"]
["a"].pad "-", 3 # ["a", "-", "-"]
%w[a b].pad "-", 3 # ["a", "b", "-"]Answers value of first element that matches given key.
array = [{name: "a", label: "A"}, {name: "b", label: "B"}, {name: "c", label: "C"}]
array.pick :name # "a"
array.pick :name, :label # ["a", "A"]
array.pick # nil
[].pick :other # nilAnswers values of all elements that match given keys.
array = [{name: "a", label: "A"}, {name: "b", label: "B"}, {name: "c", label: "C"}]
array.pluck :name # ["a", "b", "c"]
array.pluck :name, :label # [["a", "A"], ["b", "B"], ["c", "C"]]
array.pluck # []
[].pluck :other # []Answers mutated array where an element — at a specific index — is replaced by single or multiple elements.
%i[a b c].replace_at 0, :x # [:x, :b, :c]
%i[a b c].replace_at 1, :x # [:a, :x, :c]
%i[a b c].replace_at 1, :x, :y # [:a, :x, :y, :c]
%i[a b c].replace_at -1, :x # [:a, :b, :x]Answers a circular array which can enumerate before, current, after elements.
example = [1, 2, 3]
example.ring # "#<Enumerator: ...>"
example.ring { |(before, current, after)| puts "#{before} #{current} #{after}" }
# [3 1 2]
# [1 2 3]
# [2 3 1]Answers mutated array where first target element found is replaced by single or multiple elements.
%i[a b a].supplant :a, :z # [:z, :b, :a]
%i[a b a].supplant :a, :z, :y # [:z, :y, :b, :a]
%i[a b a].supplant :a, %i[z y] # [[:z, :y], :b, :a]Answers mutated array where all target elements are replaced by single or multiple elements.
%i[a b a].supplant_if :a, :z # [:z, :b, :z]
%i[a b a].supplant_if :a, :z, :y # [:z, :y, :b, :z, :y]
%i[a b a].supplant_if :a, %i[z y] # [[:z, :y], :b, [:z, :y]]Answers a sentence using "and" as the default conjunction and ", " as the default delimiter.
Useful when building documentation, answering human readable error messages, etc.
[].to_sentence # ""
["demo"].to_sentence # "demo"
["a", :b].to_sentence # "a and b"
[1, "a", :b, 2.0, /\w+/].to_sentence # "1, a, b, 2.0, and (?-mix:\\w+)"
%w[one two three].to_sentence # "one, two, and three"
%w[eins zwei drei].to_sentence "und", delimiter: " " # "eins zwei und drei"💡 You can use a string or a symbol for the conjunction (i.e. "and" or :and).
Further enhances #to_sentence by answering a sentence where all elements are inspected (i.e. #inspect) before turned into a sentence using "and" as the default conjunction and ", " as the default delimiter. This is useful when providing detailed error messages and you need the types of all elements preserved.
[].to_usage # ""
["demo"].to_usage # "\"demo\""
["a", :b].to_usage # "\"a\" and :b"
[1, "a", :b, 2.0, /\w+/].to_usage # "1, \"a\", :b, 2.0, and /\\w+/"
%w[one two three].to_usage # "\"one\", \"two\", and \"three\""
%w[eins zwei drei].to_usage "und", delimiter: " " # "\"eins\" \"zwei\" und \"drei\""💡 You can use a string or a symbol for the conjunction (i.e. "and" or :and).
Allows you to obtain a local variable. This is an alias to #local_variable_get.
a = 1
binding[:a] # 1
binding[:bogus] # `bogus' is not defined (NameError)Allows you to set a local variable. This is an alias to #local_variable_set.
a = 1
binding[:a] = 5
binding[:bogus] = "bad"
binding[:a] # 5
binding[:bogus] # # `bogus' is not defined (NameError)Allows you to check if local variable is defined. This is an alias to #local_variable_defined?.
a = 1
binding.local? :a # true
binding.local? :b # falseAllows you to obtain the differences between two objects.
implementation = Data.define :a, :b, :c
one = implementation.new a: 1, b: 2, c: 3
two = implementation.new a: 3, b: 2, c: 1
three = Data.define(:x, :y).new x: 1, y: 2
one.diff one # {}
one.diff two # {:a=>[1, 3], :c=>[3, 1]}
one.diff three # {:a=>[1, nil], :b=>[2, nil], :c=>[3, nil]}
one.diff Object.new # {:a=>[1, nil], :b=>[2, nil], :c=>[3, nil]}Any object that is not the same type will have a nil value as shown in the last two examples.
Answers new hash where missing keys, even deeply nested, answer an empty hash.
example = Hash.infinite
example[:a] # {}
example[:a][:b][:c] # {}Answers new hash where every top-level missing key has the same default value.
example = Hash.with_default ""
example[:a] # ""
example = Hash.with_default []
example[:b] # []Removes nil and empty objects without mutating itself. Answers itself if nothing to remove.
object = Object.new
example = {a: 1, b: "blueberry", c: nil, d: "", e: [], f: {}, g: object}
{}.compress # {}
{a: 1, b: 2}.compress # {a: 1, b: 2}
example.compress # {a: 1, b: "blueberry", g: object}
example # {a: 1, b: "blueberry", c: nil, d: "", e: [], f: {}, g: object}Removes nil and empty objects while mutating itself. Answers nil if nothing to remove.
object = Object.new
example = {a: 1, b: "blueberry", c: nil, d: "", e: [], f: {}, g: object}
{}.compress! # nil
{a: 1, b: 2}.compress! # nil
example.compress! # {a: 1, b: "blueberry", g: object}
example # {a: 1, b: "blueberry", g: object}Merges deeply nested hashes together without mutating itself.
example = {a: "A", b: {one: "One", two: "Two"}}
example.deep_merge b: {one: 1} # {a: "A", b: {one: 1, two: "Two"}}
example # {a: "A", b: {one: "One", two: "Two"}}Merges deeply nested hashes together while mutating itself.
example = {a: "A", b: {one: "One", two: "Two"}}
example.deep_merge! b: {one: 1} # {a: "A", b: {one: 1, two: "Two"}}
example # {a: "A", b: {one: 1, two: "Two"}}Answers string keys of a nested hash without mutating itself. Does not handle nested arrays, though.
example = {a: {b: 2}}
example.deep_stringify_keys # {"a" => {"b" => 1}}
example # {a: {b: 2}}Answers string keys of nested hash while mutating itself. Does not handle nested arrays, though.
example = {a: {b: 2}}
example.deep_stringify_keys! # {"a" => {"b" => 1}}
example # {"a" => {"b" => 1}}Symbolizes keys of nested hash without mutating itself. Does not handle nested arrays, though.
example = {"a" => {"b" => 2}}
example.deep_symbolize_keys # {a: {b: 1}}
example # {"a" => {"b" => 2}}Symbolizes keys of nested hash while mutating itself. Does not handle nested arrays, though.
example = {"a" => {"b" => 2}}
example.deep_symbolize_keys! # {a: {b: 1}}
example # {a: {b: 1}}Allows you to obtain the differences between two objects.
one = {a: 1, b: 2, c: 3}
two = {a: 3, b: 2, c: 1}
three = {c: 3, b: 2, a: 1}
four = Data.define(:x, :y).new x: 1, y: 2
one.diff one # {}
one.diff two # {:a=>[1, 3], :c=>[3, 1]}
one.diff three # {}
one.diff four # {:a=>[1, nil], :b=>[2, nil], :c=>[3, nil]}
one.diff Object.new # {:a=>[1, nil], :b=>[2, nil], :c=>[3, nil]}Any object that is not the same type will have a nil value as shown in the last two examples. Two hashes with the same keys but defined in different order behave as if they had the same key order.
Fetches value for exiting or missing key. Behavior is identical to #fetch except when the value of
the key is nil you’ll get the default value instead. This eliminates the need for using an or
expression: example.fetch(:desired_key) || "default_value".
{a: "demo"}.fetch_value :a, "default" # "demo"
{a: "demo"}.fetch_value :a # "demo"
{a: nil}.fetch_value :a, "default" # "default"
{a: nil}.fetch_value(:a) { "default" } # "default"
{}.fetch_value :a # KeyError
{}.fetch_value(:a) { "default" } # "default"
{a: "demo"}.fetch_value # ArgumentErrorFlattens nested keys as top-level keys without mutating itself. Keys are converted to symbols. Does not handle nested arrays.
{a: {b: 1}}.flatten_keys prefix: :demo # {demo_a_b: 1}
{a: {b: 1}}.flatten_keys delimiter: :| # {:"a|b" => 1}
example = {a: {b: 1}}
example.flatten_keys # {a_b: 1}
example # {a: {b: 1}}Flattens nested keys as top-level keys while mutating itself. Keys are converted to symbols. Does not handle nested arrays.
{a: {b: 1}}.flatten_keys! prefix: :demo # {demo_a_b: 1}
{a: {b: 1}}.flatten_keys! delimiter: :| # {:"a|b" => 1}
example = {a: {b: 1}}
example.flatten_keys! # {a_b: 1}
example # {a_b: 1}Answers true if a hash has more than one element. Can take a block which evaluates as truthy or falsey.
{a: 1, b: 2}.many? # true
{a: 1, b: 2, c: 2}.many? { |_key, value| value == 2 } # true
{a: 1}.many? # false
{}.many? # falseRecursively iterates over the hash and any hash value by applying the given block to it. Does not handle nested arrays, though.
example = {"a" => {"b" => 1}}
example.recurse(&:symbolize_keys) # {a: {b: 1}}
example.recurse(&:invert) # {{"b" => 1} => "a"}Converts keys to strings without mutating itself.
example = {a: 1, b: 2}
example.stringify_keys # {"a" => 1, "b" => 2}
example # {a: 1, b: 2}Converts keys to strings while mutating itself.
example = {a: 1, b: 2}
example.stringify_keys! # {"a" => 1, "b" => 2}
example # {"a" => 1, "b" => 2}Converts keys to symbols without mutating itself.
example = {"a" => 1, "b" => 2}
example.symbolize_keys # {a: 1, b: 2}
example # {"a" => 1, "b" => 2}Converts keys to symbols while mutating itself.
example = {"a" => 1, "b" => 2}
example.symbolize_keys! # {a: 1, b: 2}
example # {a: 1, b: 2}Transforms a value for the specified key only if the key exists and a block is given. Otherwise, the original hash is answered. Does not mutate itself.
example = {a: 1, b: 2}
example.transform_value :b # {a: 1, b: 2}
example.transform_value(:b) { 20 } # {a: 1, b: 20}
example.transform_value(:b) { |value| value * 10 } # {a: 1, b: 20}
example.transform_value :c # {a: 1, b: 2}
example.transform_value(:c) { :bogus } # {a: 1, b: 2}The original object is not mutated:
example.transform_value(:b) { 20 } # {a: 1, b: 20}
example # {a: 1, b: 2}Transforms a value for the specified key only if the key exists and a block is given. Otherwise, the original hash is answered. Mutates itself.
example = {a: 1, b: 2}
example.transform_value! :b # {a: 1, b: 2}
example.transform_value!(:b) { 20 } # {a: 1, b: 20}
example.transform_value!(:b) { |value| value * 10 } # {a: 1, b: 20}
example.transform_value! :c # {a: 1, b: 2}
example.transform_value!(:c) { :bogus } # {a: 1, b: 2}The original object is mutated:
example.transform_value!(:b) { 20 } # {a: 1, b: 20}
example # {a: 1, b: 20}Transforms values of keys using specific operations (i.e. any object that responds to #call). Does not mutate itself and you can transform multiple values at once:
example = {name: "Jayne Doe", email: "<[email protected]>"}
example.transform_with name: -> value { value.delete_suffix " Doe" },
email: -> value { value.tr "<>", "" }
# {name: "Jayne", email: "[email protected]"}Invalid keys are ignored:
example.transform_with bogus: -> value { value.tr "<>", "" }
# {email: "<[email protected]>"}The original object is not mutated:
example # {name: "Jayne Doe", email: "<[email protected]>"}Transforms values of keys using specific operations (i.e. any object that responds to #call). Mutates itself and you can transform multiple values at once:
example = {name: "Jayne Doe", email: "<[email protected]>"}
example.transform_with! name: -> value { value.delete_suffix " Doe" },
email: -> value { value.tr "<>", "" }
# {name: "Jayne", email: "[email protected]"}Invalid keys are ignored:
example.transform_with! bogus: -> value { value.tr "<>", "" }
# {email: "<[email protected]>"}The original object is mutated:
example # {name: "Jayne", email: "[email protected]"}Uses the hash’s keys as block arguments where the value of the block argument is equal to the value of the key found within the hash. Works best with hashes that use symbols for keys but falls back to string keys when symbol keys can’t be found.
example = {unit: "221B", street: "Baker Street", city: "London", country: "UK"}
example.use { |unit, street| "#{unit} #{street}" } # "221B Baker Street"Answers an IO stream which points to /dev/null in order to ignore any reads or writes to the
stream. When given a block, the stream will automatically close upon block exit. When not given a
block, you’ll need to close the stream manually.
io = IO.void # "#<IO:fd 20>"
io = IO.void { |void| void.write "nevermore" } # "#<IO:(closed)>"Redirects current stream to other stream when given a block. Without a block, the original stream is answered instead.
io = IO.new IO.sysopen(Pathname("demo.txt").to_s, "w+")
other = IO.new IO.sysopen(Pathname("other.txt").to_s, "w+")
io.redirect other # "#<IO:fd 20>"
io.redirect(other) { |stream| stream.write "demo" } # "#<IO:fd 21>"Answers full stream by rewinding to beginning of stream and reading all content.
io = IO.new IO.sysopen(Pathname("demo.txt").to_s, "w+")
io.write "This is a demo."
io.reread # "This is a demo."
io.reread 4 # "This"
buffer = "".dup
io.reread(buffer:) # "This is a demo."
buffer # "This is a demo."Answers previously written content by rewinding to beginning of device.
# With File.
device = Logger::LogDevice.new "test.log"
device.write "Test."
device.reread # "Test."
# With StringIO.
device = Logger::LogDevice.new StringIO.new
device.write "Test."
device.reread # "Test."
# With STDOUT.
device = Logger::LogDevice.new $stdout
device.write "Test."
device.reread # ""Answers previously written content by rewinding to beginning of log.
# With File.
logger = Logger.new "test.log"
logger.write "Test."
logger.reread # "Test."
# With StringIO.
logger = Logger.new StringIO.new
logger.write "Test."
logger.reread # "Test."
# With STDOUT.
logger = Logger.new $stdout
logger.write "Test."
logger.reread # ""Allows you to log any message which is identical in behavior and functionality to the Logger#unknown method only this requires less typing and better matches the terminology used by the #unknown method.
logger = Logger.new STDOUT
logger.any "Test."
# A, [2000-01-10T09:00:00.847428 #44925] ANY -- : Test.
logger.any { "Test." }
A, [2000-01-10T09:00:00.330719 #44925] ANY -- : Test.Allows you to set a temporary name for your anonymous Module (or Class since Class inherits from Module) with a better default than what #set_temporary_name provides.
Module.new.pseudonym "demo" # demo-44600
Module.new.pseudonym "demo", delimiter: "_" # demo_60900
Module.new.pseudonym "demo", nil # demo-
Module.new.pseudonym "demo", nil, delimiter: nil # demoThe same applies for anonymous classes since classes inherit from modules:
Class.new.pseudonym "demo" # demo-44600 < Object
Class.new.pseudonym "demo", delimiter: "_" # demo_60900 < Object
Class.new.pseudonym "demo", nil # demo- < Object
Class.new.pseudonym "demo", nil, delimiter: nil # demo < Object💡 While convenient, if you find yourself nullifying the suffix and/or delimiter, you’re better off using #set_temporary_name.
Allows you to know if self is included in, or an element of, the target object.
1.in? [1, 2, 3] # true
9.in? [1, 2, 3] # false
"a".in? %w[a b c] # true
"z".in? %w[a b c] # false
:a.in? %i[a b c] # true
:z.in? %i[a b c] # false
:a.in? %i[a b c].to_enum # true
:z.in? %i[a b c].to_enum # false
:a.in?({a: 1, b: 2, c: 3}) # true
:z.in?({a: 1, b: 2, c: 3}) # false
1.in? 1..5 # true
9.in? 1..5 # false
1.in? Set[1, 2, 3] # true
9.in? Set[1, 2, 3] # false
"a".in? "abcde" # true
"z".in? "abcde" # false
"z".in? Object.new # `String#include?` must be implemented. (NoMethodError)Enhances the Kernel conversion function which casts nil into a pathname in order to avoid:
TypeError (no implicit conversion of nil into String). The pathname remains invalid but at least
you have an instance of Pathname, which behaves like a Null Object, that can be used to
construct a valid path.
Pathname nil # Pathname("")Wraps Dir.mktmpdir with the following behavior (see
Dir.mktmpdir for details):
-
Without Block - Answers a newly created Pathname instance which is not automatically cleaned up.
-
With Block Yields a Pathname instance, answers result of given block, and automatically cleans up temporary directory after block exits.
The following examples use truncated temporary directories for illustration purposes only. In reality, these paths will be longer depending on which operating system you are using.
Pathname.make_temp_dir # Pathname:/var/folders/T/temp-20200101-16940-r8
Pathname.make_temp_dir prefix: "prefix-" # Pathname:/var/folders/T/prefix-20200101-16940-r8
Pathname.make_temp_dir suffix: "-suffix" # Pathname:/var/folders/T/temp-20200101-16940-r8-suffix
Pathname.make_temp_dir prefix: "prefix-", suffix: "-suffix" # Pathname:/var/folders/T/prefix-20200101-16940-r8-suffix
Pathname.make_temp_dir root: "/example" # Pathname:/example/temp-20200101-16940-r8
Pathname.make_temp_dir { "I am a block result" } # "I am a block result"
Pathname.make_temp_dir { |path| path.join "sub_dir" } # Pathname:/var/folders/T/temp-20200101-16940-r8/sub_dirRequires all Ruby files in given root path and corresponding nested tree structure. All files are sorted before being required to ensure consistent behavior. Example:
# Before
Dir[File.join(__dir__, "support/shared_contexts/**/*.rb")].sort.each { |path| require path }
# After
Pathname.require_tree "#{__dir__}/support/shared_contexts"The following are further examples of potential usage:
# Requires all files in root directory and below.
Pathname.require_tree __dir__
# Requires all files in `/test/**/*.rb` and below.
Pathname.require_tree "/test"
# Requires all files in RSpec shared examples directory structure.
Pathname.require_tree SPEC_ROOT.join("support/shared_examples")Wraps Dir.chdir behavior by changing to directory of current path. See
Dir.chdir for details.
current = Pathname.pwd # "$HOME/demo" (Present Working Directory)
custom = current.join("test").make_dir # Pathname "$HOME/demo/test"
custom.change_dir # "$HOME/demo/test" (Present Working Directory)
current.change_dir # "$HOME/demo" (Present Working Directory)
custom.change_dir { "example" } # "example"
custom.change_dir { |path| path } # Pathname "$HOME/demo/test"
Pathname.pwd # "$HOME/demo" (Present Working Directory)Copies file from current location to new location while answering itself so it can be chained.
Pathname("input.txt").copy Pathname("output.txt") # Pathname("input.txt")Has all of the same functionality as the #touch method while being able to create ancestor
directories no matter how deeply nested the file might be.
Pathname("a/b/c/d.txt").touch # Pathname("a/b/c/d.txt")
Pathname("a/b/c/d.txt").touch Time.now - 1 # Pathname("a/b/c/d.txt")Deletes file or directory and answers itself so it can be chained.
# When path exists.
Pathname("/example.txt").touch.delete # Pathname("/example")
# When path doesn't exist.
Pathname("/example.txt").delete # Errno::ENOENTDeletes a path prefix and answers new pathname.
Pathname("a/path/example-test.rb").delete_prefix "example-" # Pathname("a/path/test.rb")
Pathname("example-test.rb").delete_prefix "example-" # Pathname("test.rb")
Pathname("example-test.rb").delete_prefix "miss" # Pathname("example-test.rb")Deletes a path suffix and answers new pathname.
Pathname("a/path/test-example.rb").delete_suffix "-example" # Pathname("a/path/test.rb")
Pathname("test-example.rb").delete_suffix "-example" # Pathname("test.rb")
Pathname("test-example.rb").delete_suffix "miss" # Pathname("test-example.rb")Answers all directories or filtered directories for current path.
Pathname("/example").directories # [Pathname("a"), Pathname("b")]
Pathname("/example").directories "a*" # [Pathname("a")]
Pathname("/example").directories flag: File::FNM_DOTMATCH # [Pathname(".."), Pathname(".")]Empties a directory of children (i.e. folders, nested folders, or files) or clears an existing file of contents. If a directory or file doesn’t exist, it will be created.
directory = Pathname("test").make_path
file = directory.join("test.txt").write("example")
file.empty.read # ""
directory.empty.children # []Answers file extensions as an array.
Pathname("example.txt.erb").extensions # [".txt", ".erb"]Answers all files or filtered files for current path.
Pathname("/example").files # [Pathname("a.txt"), Pathname("a.png")]
Pathname("/example").files "*.png" # [Pathname("a.png")]
Pathname("/example").files flag: File::FNM_DOTMATCH # [Pathname(".ruby-version")]Same behavior as String#gsub but answers a path with patterns replaced with desired substitutes.
Pathname("/a/path/some/path").gsub "path", "test"
# Pathname("/a/test/some/test")
Pathname("/%placeholder%/some/%placeholder%").gsub "%placeholder%", "test"
# Pathname("/test/some/test")Ensures all ancestor directories are created for a path.
Pathname("/one/two").make_ancestors # Pathname("/one/two")
Pathname("/one").exist? # true
Pathname("/one/two").exist? # falseProvides alternative #mkdir behavior by always answering itself (even when directory exists) and
not throwing errors when directory does exist in order to ensure the pathname can be chained.
Pathname("/one").make_dir # Pathname("/one")
Pathname("/one").make_dir.make_dir # Pathname("/one")Provides alternative #mkpath behavior by always answering itself (even when full path exists) and
not throwing errors when directory does exist in order to ensure the pathname can be chained.
Pathname("/one/two/three").make_path # Pathname("/one/two/three")
Pathname("/one/two/three").make_path.make_path # Pathname("/one/two/three")Wraps #write by writing content to file with new line and answering itself. Allows you to more easily swap out a Pathname object with similar IO objects who support #puts: IO, StringIO, File, Kernel, and so forth.
path = Pathname("test.txt").touch
path.puts "Test."
path.read # "Test.\n"
Pathname("text.txt").touch.puts("Test.").read # "Test.\n"Answers relative path from parent directory. This complements: #relative_path_from.
Pathname("/one/two/three").relative_parent "/one" # Pathname "two"Provides alternative #rmdir behavior by always answering itself (even when full path exists) and
not throwing errors when directory does exist in order to ensure the pathname can be chained.
Pathname("/test").make_dir.remove_dir.exist? # false
Pathname("/test").remove_dir # Pathname("/test")
Pathname("/test").remove_dir.remove_dir # Pathname("/test")Provides alternative #rmtree behavior by always answering itself (even when full path exists) and
not throwing errors when directory does exist in order to ensure the pathname can be chained.
parent_path = Pathname "/one"
child_path = parent_path.join "two"
child_path.make_path
parent_path.remove_tree # Pathname "/one"
child_path.exist? # false
parent_path.exist? # false
child_path.make_path
child_path.remove_tree # Pathname "/one/two"
child_path.exist? # false
parent_path.exist? # trueWhen given a block, it provides the contents of the recently read file for manipulation and immediate writing back to the same file.
Pathname("/test.txt").rewrite # Pathname("/test.txt")
Pathname("/test.txt").rewrite { |body| body.sub "[token]", "example" } # Pathname("/test.txt")Updates access and modification times for an existing path by defaulting to current time. When path doesn’t exist, it will be created as a file.
Pathname("example").touch # Pathname("example")
Pathname("example").touch Time.now - 1 # Pathname("example")
Pathname("example.txt").touch # Pathname("example.txt")
Pathname("example.txt").touch Time.now - 1 # Pathname("example.txt")Writes to file and answers itself so it can be chained. See IO.write for details on additional
options.
Pathname("example.txt").write "test" # Pathname("example.txt")
Pathname("example.txt").write "test", offset: 1 # Pathname("example.txt")
Pathname("example.txt").write "test", mode: "a" # Pathname("example.txt")Answers true/false based on whether string is blank, <space>, \n, \t, and/or \r.
" \n\t\r".blank? # trueAnswers first character of a string or first set of characters if given a number.
"example".first # "e"
"example".first 4 # "exam"Answers indentation (string) which is the result of the multiplier times padding. By default, the multiplier is 1 and the padding is " " which equates to two spaces.
"example".indent # " example"
"example".indent 0 # "example"
"example".indent -1 # "example"
"example".indent 2 # " example"
"example".indent 3, pad: " " # " example"Answers last character of a string or last set of characters if given a number.
"instant".last # "t"
"instant".last 3 # "ant"Answers plural form of self when given a suffix to add. The plural form of the word can be dynamically calculated when given a count and a replacement pattern (i.e. string or regular expression) can be supplied for further specificity. Usage is based on plurals in English which may or may not work well in other languages.
"apple".pluralize "s" # apples
"apple".pluralize "s", 0 # apples
"apple".pluralize "s", 1 # apple
"apple".pluralize "s", -1 # apple
"apple".pluralize "s", 2 # apples
"apple".pluralize "s", -2 # apples
"cactus".pluralize "i", replace: "us" # cacti
"cul-de-sac".pluralize "ls", replace: "l" # culs-de-sacAnswers singular form of self when given a suffix to remove (can be a string or a regular expression). The singular form of the word can be dynamically calculated when given a count and a replacement string can be supplied for further specificity. Usage is based on plurals in English which may or may not work well in other languages.
"apples".singularize "s" # apple
"sacks".singularize /s$/ # sack
"apples".singularize "s", 0 # apples
"apples".singularize "s", 1 # apple
"apples".singularize "s", -1 # apple
"apples".singularize "s", 2 # apples
"apples".singularize "s", -2 # apples
"cacti".singularize "i", replace: "us" # cactus
"culs-de-sac".singularize "ls", replace: "l" # cul-de-sacRemoves leading, in body, and trailing whitespace, including any tabs or newlines, without mutating itself. Processes ASCII and unicode whitespace as well.
"one two three".squish # "one two three"
" one two \n \t three ".squish # "one two three"Answers a title string with proper capitalization of each word.
"ThisIsAnExample".titleize # "This Is An Example"Answers a truncated, non-mutated, string for given length with optional delimiter and/or overflow.
The delimiter is the second positional parameter (optional) and is nil by default. A custom string or regular expression can be used to customize truncation behavior.
The trailer is an optional keyword parameter that is an ellipsis (i.e. "…") by default. The trailer can be a custom or empty string. The string length of the trailer is added to the length of the string being truncated, so keep this in mind when setting truncation length.
demo = "It was the best of times"
length = demo.length
demo.truncate 9 # "It was..."
demo.truncate 12 # "It was th..."
demo.truncate length # "It was the best of times"
demo.truncate Float::INFINITY # "It was the best of times"
demo.truncate 12, " " # "It was..."
demo.truncate 12, /\s/ # "It was..."
demo.truncate 6, trailer: "" # "It was"
demo.truncate 16, trailer: "... (more)" # "It was... (more)"
"demo".truncate 3 # "..."Answers string as a boolean.
"true".to_bool # true
"yes".to_bool # true
"1".to_bool # true
"".to_bool # false
"example".to_bool # falseAnswers full string by rewinding to beginning of string and reading all content.
io = StringIO.new
io.write "This is a test."
io.reread # "This is a test."
io.reread 4 # "This"
buffer = "".dup
io.reread(buffer:) # "This is a test."
buffer # "This is a test."Answers underlying string representation for explicit conversion.
io = StringIO.new
io.write "One"
io.write ", "
io.write "Two."
io.to_s # "One, Two."Answers a struct instance with given positional arguments regardless of whether the struct was constructed with positional or keyword arguments.
Example = Struct.new :a, :b, :c
Example.with_positions 1, 2, 3 # #<struct a=1, b=2, c=3>
Example.with_positions 1 # #<struct a=1, b=nil, c=nil>
Example = Struct.new :a, :b, :c, keyword_init: true
Example.with_positions 1, 2, 3 # #<struct a=1, b=2, c=3>
Example.with_positions 1 # #<struct a=1, b=nil, c=nil>Allows you to obtain the differences between two objects.
implementation = Struct.new :a, :b, :c
one = implementation.new a: 1, b: 2, c: 3
two = implementation.new a: 3, b: 2, c: 1
three = Struct.new(:x, :y).new x: 1, y: 2
one.diff one # {}
one.diff two # {:a=>[1, 3], :c=>[3, 1]}
one.diff three # {:a=>[1, nil], :b=>[2, nil], :c=>[3, nil]}
one.diff Object.new # {:a=>[1, nil], :b=>[2, nil], :c=>[3, nil]}Any object that is not the same type will have a nil value as shown in the last two examples.
Merges multiple attributes without mutating itself and supports any object that responds to #to_h.
Works regardless of whether the struct is constructed with positional or keyword arguments.
example = Struct.new("Example", :a, :b, :c).new 1, 2, 3
other = Struct.new("Other", :a, :b, :c).new 7, 8, 9
example.merge a: 10 # #<struct Struct::Example a=10, b=2, c=3>
example.merge a: 10, c: 30 # #<struct Struct::Example a=10, b=2, c=30>
example.merge a: 10, b: 20, c: 30 # #<struct Struct::Example a=10, b=20, c=30>
example.merge other # #<struct Struct::Example a=7, b=8, c=9>
example # #<struct Struct::Example a=1, b=2, c=3>Merges multiple attributes while mutating itself and supports any object that responds to #to_h.
Works regardless of whether the struct is constructed with positional or keyword arguments.
example = Struct.new("Example", :a, :b, :c).new 1, 2, 3
other = Struct.new("Other", :a, :b, :c).new 7, 8, 9
example.merge! a: 10 # #<struct Struct::Example a=10, b=2, c=3>
example.merge! a: 10, c: 30 # #<struct Struct::Example a=10, b=2, c=30>
example.merge! other # #<struct Struct::Example a=7, b=8, c=9>
example.merge! a: 10, b: 20, c: 30 # #<struct Struct::Example a=10, b=20, c=30>
example # #<struct Struct::Example a=10, b=20, c=30>Transforms values without mutating itself. An optional hash can be supplied to target specific attributes. In the event that a block isn’t supplied, the struct will answer itself since there is nothing to operate on. Works regardless of whether the struct is constructed with positional or keyword arguments.
example = Struct.new("Example", :a, :b, :c).new 1, 2, 3
example.revalue { |value| value * 2 } # #<struct Struct::Example a=2, b=4, c=6>
example.revalue(c: 2) { |previous, current| previous + current } # #<struct Struct::Example a=1, b=2, c=5>
example.revalue c: 2 # #<struct Struct::Example a=1, b=2, c=3>
example.revalue # #<struct Struct::Example a=1, b=2, c=3>
example # #<struct Struct::Example a=1, b=2, c=3>Transforms values while mutating itself. An optional hash can be supplied to target specific attributes. In the event that a block isn’t supplied, the struct will answer itself since there is nothing to operate on. Works regardless of whether the struct is constructed with positional or keyword arguments.
one = Struct.new("One", :a, :b, :c).new 1, 2, 3
one.revalue! { |value| value * 2 } # #<struct Struct::One a=2, b=4, c=6>
one # #<struct Struct::One a=2, b=4, c=6>
two = Struct.new("Two", :a, :b, :c).new 1, 2, 3
two.revalue!(c: 2) { |previous, current| previous + current } # #<struct Struct::Two a=1, b=2, c=5>
two # #<struct Struct::Two a=1, b=2, c=5>
three = Struct.new("Three", :a, :b, :c).new 1, 2, 3
three.revalue! c: 2 # #<struct Struct::Three a=1, b=2, c=3>
three.revalue! # #<struct Struct::Three a=1, b=2, c=3>
three # #<struct Struct::Three a=1, b=2, c=3>Transmutes given enumerable by using the foreign key map and merging those key values into the current struct while not mutating itself. Works regardless of whether the struct is constructed with positional or keyword arguments.
a = Struct.new("A", :a, :b, :c).new 1, 2, 3
b = Struct.new("B", :x, :y, :z).new 7, 8, 9
c = {r: 10, s: 20, t: 30}
a.transmute b, a: :x, b: :y, c: :z # #<struct Struct::A a=7, b=8, c=9>
a.transmute b, b: :y # #<struct Struct::A a=1, b=8, c=3>
a.transmute c, c: :t # #<struct Struct::A a=1, b=2, c=30>
a # #<struct Struct::A a=1, b=2, c=3>Transmutes given enumerable by using the foreign key map and merging those key values into the current struct while mutating itself. Works regardless of whether the struct is constructed with positional or keyword arguments.
a = Struct.new("A", :a, :b, :c).new 1, 2, 3
b = Struct.new("B", :x, :y, :z).new 7, 8, 9
c = {r: 10, s: 20, t: 30}
a.transmute! b, a: :x, b: :y, c: :z # #<struct Struct::A a=7, b=8, c=9>
a.transmute! b, b: :y # #<struct Struct::A a=1, b=8, c=3>
a.transmute! c, c: :t # #<struct Struct::A a=1, b=2, c=30>
a # #<struct Struct::A a=7, b=8, c=30>Enhances symbol-to-proc functionality by allowing you to send positional, keyword, and/or a block arguments. This only works with public methods in order to not break encapsulation.
%w[clue crow cow].map(&:tr.call("c", "b")) # ["blue", "brow", "bow"]
[1.3, 1.5, 1.9].map(&:round.call(half: :up)) # [1, 2, 2]
[%w[a b c], %w[c a b]].map(&:index.call { |element| element == "b" }) # [1, 2]
%w[1.out 2.in].map(&:sub.call(/\./) { |bullet| bullet + " " }) # ["1. out", "2. in"]
[1, 2, 3].map(&:to_s.call) # ["1", "2", "3"]#call without any arguments should be avoided in order to not incur extra processing costs since the original symbol-to-proc call can be used instead.
To contribute, run:
git clone https://github.com/bkuhlmann/refinements
cd refinements
bin/setupYou can also use the IRB console for direct access to all objects:
bin/console-
Built with Gemsmith.
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Engineered by Brooke Kuhlmann.