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体验新版 GitCode,发现更多精彩内容 >>
提交
396f9df8
编写于
7月 16, 2008
作者:
J
Josh Owens
提交者:
Joshua Peek
7月 16, 2008
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差异文件
Hash#slice supports an array of keys [#613 state:resolved]
Signed-off-by:
N
Joshua Peek
<
josh@joshpeek.com
>
上级
7ae2105d
变更
2
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Showing
2 changed file
with
36 addition
and
21 deletion
+36
-21
activesupport/lib/active_support/core_ext/hash/slice.rb
activesupport/lib/active_support/core_ext/hash/slice.rb
+1
-0
activesupport/test/core_ext/hash_ext_test.rb
activesupport/test/core_ext/hash_ext_test.rb
+35
-21
未找到文件。
activesupport/lib/active_support/core_ext/hash/slice.rb
浏览文件 @
396f9df8
...
...
@@ -12,6 +12,7 @@ module Hash #:nodoc:
module
Slice
# Returns a new hash with only the given keys.
def
slice
(
*
keys
)
keys
.
flatten!
keys
=
keys
.
map!
{
|
key
|
convert_key
(
key
)
}
if
respond_to?
(
:convert_key
)
hash
=
{}
keys
.
each
{
|
k
|
hash
[
k
]
=
self
[
k
]
if
has_key?
(
k
)
}
...
...
activesupport/test/core_ext/hash_ext_test.rb
浏览文件 @
396f9df8
...
...
@@ -282,6 +282,20 @@ def test_slice
assert_equal
expected
,
original
end
# This is needed for something like hash.slice!(hash.keys.sort_by {rand} [0..4])
def
test_slice_with_array_keys
original
=
{
:a
=>
'x'
,
:b
=>
'y'
,
:c
=>
10
}
expected
=
{
:a
=>
'x'
,
:b
=>
'y'
}
# Should return a new hash with only the given keys, when given an array of keys.
assert_equal
expected
,
original
.
slice
([
:a
,
:b
])
assert_not_equal
expected
,
original
# Should replace the hash with only the given keys, when given an array of keys.
assert_equal
expected
,
original
.
slice!
([
:a
,
:b
])
assert_equal
expected
,
original
end
def
test_indifferent_slice
original
=
{
:a
=>
'x'
,
:b
=>
'y'
,
:c
=>
10
}.
with_indifferent_access
expected
=
{
:a
=>
'x'
,
:b
=>
'y'
}.
with_indifferent_access
...
...
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