diff --git a/config.json b/config.json index 028568a..91f9ed4 100644 --- a/config.json +++ b/config.json @@ -85,6 +85,14 @@ "math" ] }, + { + "slug": "pop-count", + "name": "Eliud's Eggs", + "uuid": "9ef83f95-6fae-486a-9a42-d763961066cb", + "practices": [], + "prerequisites": [], + "difficulty": 2 + }, { "slug": "etl", "name": "ETL", diff --git a/exercises/practice/pop-count/.docs/instructions.md b/exercises/practice/pop-count/.docs/instructions.md new file mode 100644 index 0000000..b0c2df5 --- /dev/null +++ b/exercises/practice/pop-count/.docs/instructions.md @@ -0,0 +1,8 @@ +# Instructions + +Your task is to count the number of 1 bits in the binary representation of a number. + +## Restrictions + +Keep your hands off that bit-count functionality provided by your standard library! +Solve this one yourself using other basic tools instead. diff --git a/exercises/practice/pop-count/.docs/introduction.md b/exercises/practice/pop-count/.docs/introduction.md new file mode 100644 index 0000000..49eaffd --- /dev/null +++ b/exercises/practice/pop-count/.docs/introduction.md @@ -0,0 +1,47 @@ +# Introduction + +Your friend Eliud inherited a farm from her grandma Tigist. +Her granny was an inventor and had a tendency to build things in an overly complicated manner. +The chicken coop has a digital display showing an encoded number representing the positions of all eggs that could be picked up. + +Eliud is asking you to write a program that shows the actual number of eggs in the coop. + +The position information encoding is calculated as follows: + +1. Scan the potential egg-laying spots and mark down a `1` for an existing egg or a `0` for an empty spot. +2. Convert the number from binary to decimal. +3. Show the result on the display. + +Example 1: + +```text +Chicken Coop: + _ _ _ _ _ _ _ +|E| |E|E| | |E| + +Resulting Binary: + 1 0 1 1 0 0 1 + +Decimal number on the display: +89 + +Actual eggs in the coop: +4 +``` + +Example 2: + +```text +Chicken Coop: + _ _ _ _ _ _ _ _ +| | | |E| | | | | + +Resulting Binary: + 0 0 0 1 0 0 0 0 + +Decimal number on the display: +16 + +Actual eggs in the coop: +1 +``` diff --git a/exercises/practice/pop-count/.meta/config.json b/exercises/practice/pop-count/.meta/config.json new file mode 100644 index 0000000..36056b5 --- /dev/null +++ b/exercises/practice/pop-count/.meta/config.json @@ -0,0 +1,19 @@ +{ + "authors": [ + "BNAndras" + ], + "files": { + "solution": [ + "pop_count.vim" + ], + "test": [ + "pop_count.vader" + ], + "example": [ + ".meta/example.vim" + ] + }, + "blurb": "Count the 1 bits in a number", + "source": "Christian Willner, Eric Willigers", + "source_url": "https://forum.exercism.org/t/new-exercise-suggestion-pop-count/7632/5" +} diff --git a/exercises/practice/pop-count/.meta/example.vim b/exercises/practice/pop-count/.meta/example.vim new file mode 100644 index 0000000..a584d65 --- /dev/null +++ b/exercises/practice/pop-count/.meta/example.vim @@ -0,0 +1,14 @@ +function! EggCount(num) abort + let counter = 0 + + let working = a:num + while working != 0 + if working % 2 + let counter += 1 + endif + + let working /= 2 + endwhile + + return counter +endfunction diff --git a/exercises/practice/pop-count/.meta/tests.toml b/exercises/practice/pop-count/.meta/tests.toml new file mode 100644 index 0000000..e11683c --- /dev/null +++ b/exercises/practice/pop-count/.meta/tests.toml @@ -0,0 +1,22 @@ +# This is an auto-generated file. +# +# Regenerating this file via `configlet sync` will: +# - Recreate every `description` key/value pair +# - Recreate every `reimplements` key/value pair, where they exist in problem-specifications +# - Remove any `include = true` key/value pair (an omitted `include` key implies inclusion) +# - Preserve any other key/value pair +# +# As user-added comments (using the # character) will be removed when this file +# is regenerated, comments can be added via a `comment` key. + +[559e789d-07d1-4422-9004-3b699f83bca3] +description = "0 eggs" + +[97223282-f71e-490c-92f0-b3ec9e275aba] +description = "1 egg" + +[1f8fd18f-26e9-4144-9a0e-57cdfc4f4ff5] +description = "4 eggs" + +[0c18be92-a498-4ef2-bcbb-28ac4b06cb81] +description = "13 eggs" diff --git a/exercises/practice/pop-count/pop_count.vader b/exercises/practice/pop-count/pop_count.vader new file mode 100644 index 0000000..d81aaa4 --- /dev/null +++ b/exercises/practice/pop-count/pop_count.vader @@ -0,0 +1,20 @@ + +Execute (0 eggs): + let g:number = 0 + let g:expected = 0 + AssertEqual g:expected, EggCount(g:number) + +Execute (1 egg): + let g:number = 16 + let g:expected = 1 + AssertEqual g:expected, EggCount(g:number) + +Execute (4 eggs): + let g:number = 89 + let g:expected = 4 + AssertEqual g:expected, EggCount(g:number) + +Execute (13 eggs): + let g:number = 2000000000 + let g:expected = 13 + AssertEqual g:expected, EggCount(g:number) diff --git a/exercises/practice/pop-count/pop_count.vim b/exercises/practice/pop-count/pop_count.vim new file mode 100644 index 0000000..7d41370 --- /dev/null +++ b/exercises/practice/pop-count/pop_count.vim @@ -0,0 +1,14 @@ +" +" Given a base-ten number, compute how many 1 bits are present +" +" Examples: +" +" :echo EggCount(0) +" 0 +" +" :echo EggCount(16) +" 1 +" +function! EggCount(num) abort + " your code goes here +endfunction