paiza.ioでelixir その101

概要

paiza.ioでelixirやってみた。
Enum使ってみた。

サンプルコード

Enum.all?([1, 2, 3])
|> IO.inspect
Enum.all?([1, nil, 3])
|> IO.inspect
Enum.all?([2, 4, 6], fn x -> 
	rem(x, 2) == 0 
end)
|> IO.inspect
Enum.all?([2, 3, 4], fn x -> 
	rem(x, 2) == 0 
end)
|> IO.inspect
Enum.any?([false, false, false])
|> IO.inspect
Enum.any?([false, true, false])
|> IO.inspect
Enum.any?([2, 4, 6], fn x -> 
	rem(x, 2) == 1 
end)
|> IO.inspect
Enum.any?([2, 3, 4], fn x -> 
	rem(x, 2) == 1 
end)
|> IO.inspect
Enum.at([2, 4, 6], 0)
|> IO.inspect
Enum.chunk_by([1, 2, 2, 3, 4, 4, 6, 7, 7], &(rem(&1, 2) == 1))
|> IO.inspect
Enum.chunk_every([1, 2, 3, 4, 5, 6], 2)
|> IO.inspect
chunk_fun = fn element, acc ->
	if rem(element, 2) == 0 do
		{:cont, Enum.reverse([element | acc]), []}
	else
		{:cont, [element | acc]}
	end
end
after_fun = fn
	[] -> 
		{:cont, []}
	acc -> 
		{:cont, Enum.reverse(acc), []}
end
Enum.chunk_while(1..10, [], chunk_fun, after_fun)
|> IO.inspect
Enum.concat([1..3, 4..6, 7..9])
|> IO.inspect
Enum.concat(1..3, 4..6)
|> IO.inspect
Enum.count([1, 2, 3])
|> IO.inspect
Enum.count([1, 2, 3, 4, 5], fn x -> 
	rem(x, 2) == 0 
end)
|> IO.inspect
Enum.count_until(1..20, 5)
|> IO.inspect
Enum.count_until(1..20, fn x -> 
	rem(x, 2) == 0 
end, 7)
|> IO.inspect
Enum.dedup([1, 2, 3, 3, 2, 1])
|> IO.inspect
Enum.dedup_by([{1, :a}, {2, :b}, {2, :c}, {1, :a}], fn {x, _} -> 
	x 
end)
|> IO.inspect
Enum.drop([1, 2, 3], 2)
|> IO.inspect
Enum.drop_every(1..10, 2)
|> IO.inspect
Enum.drop_while([1, 2, 3, 2, 1], fn x -> 
	x < 3 
end)
|> IO.inspect
Enum.each(["some", "example"], fn x -> 
	IO.puts(x) 
end)
|> IO.inspect
Enum.empty?([])
|> IO.inspect
Enum.fetch([2, 4, 6], 0)
|> IO.inspect
Enum.fetch!([2, 4, 6], 0)
|> IO.inspect
Enum.filter([1, 2, 3], fn x -> 
	rem(x, 2) == 0 
end)
|> IO.inspect
Enum.find([2, 3, 4], fn x -> 
	rem(x, 2) == 1 
end)
|> IO.inspect
Enum.find_index([2, 4, 6], fn x -> 
	rem(x, 2) == 1 
end)
|> IO.inspect
Enum.find_index([2, 3, 4], fn x -> 
	rem(x, 2) == 1 
end)
|> IO.inspect
Enum.find_value([2, 3, 4], fn x ->
	if x > 2, do: x * x
end)
|> IO.inspect
Enum.flat_map([:a, :b, :c], fn x -> 
	[x, x] 
end)
|> IO.inspect
enumerable = 1..100
n = 3
Enum.flat_map_reduce(enumerable, 0, fn x, acc ->
	if acc < n, do: {[x], acc + 1}, else: {:halt, acc}
end)
|> IO.inspect
Enum.frequencies(~w{ant buffalo ant ant buffalo dingo})
|> IO.inspect
Enum.frequencies_by(~w{aa aA bb cc}, &String.downcase/1)
|> IO.inspect
Enum.group_by(~w{ant buffalo cat dingo}, &String.length/1)
|> IO.inspect
Enum.intersperse([1, 2, 3], 0)
|> IO.inspect
Enum.into([1, 2], [])
|> IO.inspect
Enum.into([2, 3], [3], fn x -> 
	x * 3 
end)
|> IO.inspect
Enum.join([1, 2, 3])
|> IO.inspect
Enum.map([1, 2, 3], fn x -> 
	x * 2 
end)
|> IO.inspect
Enum.map_every(1..10, 2, fn x -> 
	x + 1000 
end)
|> IO.inspect
Enum.map_intersperse([1, 2, 3], :a, &(&1 * 2))
|> IO.inspect
Enum.map_join([1, 2, 3], &(&1 * 2))
|> IO.inspect
Enum.map_reduce([1, 2, 3], 0, fn x, acc -> 
	{x * 2, x + acc} 
end)
|> IO.inspect
Enum.max([1, 2, 3])
|> IO.inspect
Enum.max_by(["a", "aa", "aaa"], fn x -> 
	String.length(x) 
end)
|> IO.inspect
Enum.member?(1..10, 5)
|> IO.inspect
Enum.min([1, 2, 3])
|> IO.inspect
Enum.min_by(["a", "aa", "aaa"], fn x -> 
	String.length(x) 
end)
|> IO.inspect
Enum.min_max([2, 3, 1])
|> IO.inspect
Enum.min_max_by(["aaa", "bb", "c"], fn x -> 
	String.length(x) 
end)
|> IO.inspect
Enum.product([])
|> IO.inspect
Enum.product([2, 3, 4])
|> IO.inspect
:rand.seed(:exsss, {100, 101, 102})
Enum.random([1, 2, 3])
|> IO.inspect
Enum.reduce([1, 2, 3, 4], fn x, acc -> 
	x * acc 
end)
|> IO.inspect
Enum.reduce([1, 2, 3], 0, fn x, acc -> 
	x + acc 
end)
|> IO.inspect
Enum.reduce_while(1..100, 0, fn x, acc ->
	if x < 5, do: {:cont, acc + x}, else: {:halt, acc}
end)
|> IO.inspect
Enum.reject([1, 2, 3], fn x -> 
	rem(x, 2) == 0 
end)
|> IO.inspect
Enum.reverse([1, 2, 3])
|> IO.inspect
Enum.reverse([1, 2, 3], [4, 5, 6])
|> IO.inspect
Enum.reverse_slice([1, 2, 3, 4, 5, 6], 2, 4)
|> IO.inspect
Enum.scan(1..5, &(&1 + &2))
|> IO.inspect
Enum.scan(1..5, 0, &(&1 + &2))
|> IO.inspect
:rand.seed(:exsss, {1, 2, 3})
Enum.shuffle([1, 2, 3])
|> IO.inspect
Enum.slice(1..100, 5..10)
|> IO.inspect
Enum.slice(1..100, 5, 10)
|> IO.inspect
Enum.sort([3, 2, 1])
|> IO.inspect
Enum.sort([1, 2, 3], &(&1 >= &2))
|> IO.inspect
Enum.sort_by(["some", "kind", "of", "monster"], &byte_size/1)
|> IO.inspect
Enum.split([1, 2, 3], 2)
|> IO.inspect
Enum.split_while([1, 2, 3, 4], fn x -> 
	x < 3 
end)
|> IO.inspect
Enum.split_with([5, 4, 3, 2, 1, 0], fn x -> 
	rem(x, 2) == 0 
end)
|> IO.inspect
Enum.sum([1, 2, 3])
|> IO.inspect
Enum.take([1, 2, 3], 2)
|> IO.inspect
Enum.take_every(1..10, 2)
|> IO.inspect
:rand.seed(:exsss, {1, 2, 3})
Enum.take_random(1..10, 2)
|> IO.inspect
Enum.take_while([1, 2, 3], fn x -> 
	x < 3 
end)
|> IO.inspect
Enum.to_list(1..3)
|> IO.inspect
Enum.uniq([1, 2, 3, 3, 2, 1])
|> IO.inspect
Enum.uniq_by([{1, :x}, {2, :y}, {1, :z}], fn {x, _} -> 
	x 
end)
|> IO.inspect
Enum.unzip([{:a, 1}, {:b, 2}, {:c, 3}])
|> IO.inspect
Enum.with_index([:a, :b, :c])
|> IO.inspect
Enum.zip([[1, 2, 3], [:a, :b, :c], ["foo", "bar", "baz"]])
|> IO.inspect
Enum.zip([1, 2, 3], [:a, :b, :c])
|> IO.inspect
enums = [[1, 1], [2, 2], [3, 3]]
Enum.zip_reduce(enums, [], fn elements, acc ->
	 [List.to_tuple(elements) | acc]
end)
|> IO.inspect
Enum.zip_reduce([1, 2], [3, 4], 0, fn x, y, acc -> 
	x + y + acc 
end)
|> IO.inspect
Enum.zip_with([[1, 2], [3, 4], [5, 6]], fn [x, y, z] -> 
	x + y + z 
end)
|> IO.inspect
Enum.zip_with([1, 2], [3, 4], fn x, y -> 
	x + y 
end)
|> IO.inspect

実行結果

true
false
true
false
false
true
false
true
2
[[1], [2, 2], [3], [4, 4, 6], '\a\a']
[[1, 2], [3, 4], [5, 6]]
[[1, 2], [3, 4], [5, 6], '\a\b', '\t\n']
[1, 2, 3, 4, 5, 6, 7, 8, 9]
[1, 2, 3, 4, 5, 6]
3
2
5
7
[1, 2, 3, 2, 1]
[{1, :a}, {2, :b}, {1, :a}]
[3]
[2, 4, 6, 8, 10]
[3, 2, 1]
some
example
:ok
true
{:ok, 2}
2
[2]
3
nil
1
9
[:a, :a, :b, :b, :c, :c]
{[1, 2, 3], 3}
%{"ant" => 3, "buffalo" => 2, "dingo" => 1}
%{"aa" => 2, "bb" => 1, "cc" => 1}
%{3 => ["ant", "cat"], 5 => ["dingo"], 7 => ["buffalo"]}
[1, 0, 2, 0, 3]
[1, 2]
[3, 6, 9]
"123"
[2, 4, 6]
[1001, 2, 1003, 4, 1005, 6, 1007, 8, 1009, 10]
[2, :a, 4, :a, 6]
"246"
{[2, 4, 6], 6}
3
"aaa"
true
1
"a"
{1, 3}
{"c", "aaa"}
1
24
2
24
6
10
[1, 3]
[3, 2, 1]
[3, 2, 1, 4, 5, 6]
[1, 2, 6, 5, 4, 3]
[1, 3, 6, 10, 15]
[1, 3, 6, 10, 15]
[3, 2, 1]
[6, 7, 8, 9, 10, 11]
[6, 7, 8, 9, 10, 11, 12, 13, 14, 15]
[1, 2, 3]
[3, 2, 1]
["of", "some", "kind", "monster"]
{[1, 2], [3]}
{[1, 2], [3, 4]}
{[4, 2, 0], [5, 3, 1]}
6
[1, 2]
[1, 3, 5, 7, 9]
[3, 1]
[1, 2]
[1, 2, 3]
[1, 2, 3]
[{1, :x}, {2, :y}]
{[:a, :b, :c], [1, 2, 3]}
[a: 0, b: 1, c: 2]
[{1, :a, "foo"}, {2, :b, "bar"}, {3, :c, "baz"}]
[{1, :a}, {2, :b}, {3, :c}]
[{1, 2, 3}, {1, 2, 3}]
10
'\t\f'
[4, 6]

#成果物

以上。