From dc93f17286f6afabd4e0fd218d52297387577c0f Mon Sep 17 00:00:00 2001
From: Stefan Bringuier <2709082+stefanbringuier@users.noreply.github.com>
Date: Mon, 1 Nov 2021 17:11:26 -0700
Subject: [PATCH 1/6] Update PeriodicTable.jl

Add utility functions to return list of passed `Element` field from `Elements`.
---
 src/PeriodicTable.jl | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/PeriodicTable.jl b/src/PeriodicTable.jl
index a51a369..4feb280 100644
--- a/src/PeriodicTable.jl
+++ b/src/PeriodicTable.jl
@@ -166,6 +166,10 @@ Base.get(e::Elements, i::Integer, default) = get(e.bynumber, i, default)
 Base.get(e::Elements, i::AbstractString, default) = get(e.byname, lowercase(i), default)
 Base.get(e::Elements, i::Symbol, default) = get(e.bysymbol, i, default)
 
+# Utility functions
+getlist(e::Elements, i::Symbol) = getfield.(e,i)
+getlist(e::Elements, i::AbstractString) = getfield.(e,Symbol(i))
+
 # support iterating over elements
 Base.eltype(e::Elements) = Element
 Base.length(e::Elements) = length(e.data)

From 1d8285036e0b3073eeb68508a231d4815501413b Mon Sep 17 00:00:00 2001
From: Stefan Bringuier <2709082+stefanbringuier@users.noreply.github.com>
Date: Mon, 1 Nov 2021 17:23:11 -0700
Subject: [PATCH 2/6] Update PeriodicTable.jl

Additional method if a Vector{Element} is passed, i.e., slice of elements.
---
 src/PeriodicTable.jl | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/PeriodicTable.jl b/src/PeriodicTable.jl
index 4feb280..0e3c956 100644
--- a/src/PeriodicTable.jl
+++ b/src/PeriodicTable.jl
@@ -169,6 +169,8 @@ Base.get(e::Elements, i::Symbol, default) = get(e.bysymbol, i, default)
 # Utility functions
 getlist(e::Elements, i::Symbol) = getfield.(e,i)
 getlist(e::Elements, i::AbstractString) = getfield.(e,Symbol(i))
+getlist(e::Vector{Element}, i) = getlist(Elements(e),i)
+
 
 # support iterating over elements
 Base.eltype(e::Elements) = Element

From 3caa5b2b00daea4c18e99f0d5fc2710a2d482259 Mon Sep 17 00:00:00 2001
From: Stefan Bringuier <2709082+stefanbringuier@users.noreply.github.com>
Date: Mon, 1 Nov 2021 17:26:33 -0700
Subject: [PATCH 3/6] Update PeriodicTable.jl

Add module export of `getlist`.
---
 src/PeriodicTable.jl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/PeriodicTable.jl b/src/PeriodicTable.jl
index 0e3c956..4fb9a32 100644
--- a/src/PeriodicTable.jl
+++ b/src/PeriodicTable.jl
@@ -10,6 +10,7 @@ e.g. `elements[:O]`.
 """
 module PeriodicTable
 export Element, elements
+export getlist
 
 import Unitful: u, g, cm, K, J, mol, Quantity
 

From 133af55e02eebea945b703b206b0d3c6f1f8df23 Mon Sep 17 00:00:00 2001
From: Stefan Bringuier <2709082+stefanbringuier@users.noreply.github.com>
Date: Mon, 1 Nov 2021 17:41:55 -0700
Subject: [PATCH 4/6] Update runtests.jl

Add tests for utility function.
---
 test/runtests.jl | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/test/runtests.jl b/test/runtests.jl
index f56173a..ce38f30 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -81,3 +81,9 @@ for z in eachindex(elements)
     @test haskey(elmdict, elements[z])
     @test elmdict[elements[z]] == z
 end
+
+# Test utility function
+@test length(getlist(elements,:symbol)) == length(elements)
+@test getlist(elements[1:2],:name) == ["Hydrogen","Helium"]
+@test getlist(elements[3:4],"symbol") == ["Li","Be"]
+@test getlist(elements[[6,74]],:density) = [1.821u"g*cm^-3",13.51u"g*cm^-3"]

From 4fe8fb75c4ef5f1ccf52f125fa42fceb3c1e9642 Mon Sep 17 00:00:00 2001
From: Stefan Bringuier <2709082+stefanbringuier@users.noreply.github.com>
Date: Mon, 1 Nov 2021 17:50:58 -0700
Subject: [PATCH 5/6] Update runtests.jl

Typo fix.
---
 test/runtests.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/runtests.jl b/test/runtests.jl
index ce38f30..4977707 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -86,4 +86,4 @@ end
 @test length(getlist(elements,:symbol)) == length(elements)
 @test getlist(elements[1:2],:name) == ["Hydrogen","Helium"]
 @test getlist(elements[3:4],"symbol") == ["Li","Be"]
-@test getlist(elements[[6,74]],:density) = [1.821u"g*cm^-3",13.51u"g*cm^-3"]
+@test getlist(elements[[6,74]],:density) == [1.821u"g*cm^-3",13.51u"g*cm^-3"]

From fbda705d066b2934a782a918ddbccc54c9b4fe2e Mon Sep 17 00:00:00 2001
From: Stefan Bringuier <2709082+stefanbringuier@users.noreply.github.com>
Date: Mon, 1 Nov 2021 17:59:29 -0700
Subject: [PATCH 6/6] Update runtests.jl

Fix typo.
---
 test/runtests.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/test/runtests.jl b/test/runtests.jl
index 4977707..6caf1fc 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -86,4 +86,4 @@ end
 @test length(getlist(elements,:symbol)) == length(elements)
 @test getlist(elements[1:2],:name) == ["Hydrogen","Helium"]
 @test getlist(elements[3:4],"symbol") == ["Li","Be"]
-@test getlist(elements[[6,74]],:density) == [1.821u"g*cm^-3",13.51u"g*cm^-3"]
+@test getlist(elements[[6,74]],:density) == [1.821u"g*cm^-3",19.25u"g*cm^-3"]