Feature #6118 » 000_ruby_hash_keys_of.patch
| ChangeLog (working copy) | ||
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Mon Mar 27 01:20:05 2012 Sambasiva Rao Suda <sambasivarao@gmail.org>
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* hash.c (rb_hash_keys_of): Adding new method Hash#keys_of(value),
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which will return array having all the keys of the given value.
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[ruby-dev:45310][Feature #6118]
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Mon Mar 26 23:43:04 2012 Shugo Maeda <shugo@ruby-lang.org>
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* lib/net/ftp.rb (parse227, parse228, parse229): don't use $~.
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| hash.c (working copy) | ||
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return args[1];
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}
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static int
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keys_of_i(VALUE key, VALUE value, VALUE ary)
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{
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VALUE arg = rb_ary_entry(ary, 0);
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if (rb_equal(value, arg)) {
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rb_ary_push(ary, key);
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}
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return ST_CONTINUE;
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}
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/*
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* call-seq:
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* hsh.keys_of(value) -> [key]
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*
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* Returns the keys of a given value. If the value is
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* not found, returns <code>[]</code>.
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*
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* h = { "a" => 100, "b" => 200, "c" => 300, "d" => 300}
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* h.key(200) #=> ["b"]
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* h.key(300) #=> ["c", "d"]
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* h.key(999) #=> []
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*
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*/
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static VALUE
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rb_hash_keys_of(VALUE hash, VALUE value)
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{
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VALUE ary;
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ary = rb_ary_new();
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rb_ary_push(ary, value);
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rb_hash_foreach(hash, keys_of_i, ary);
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rb_ary_shift(ary);
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return ary;
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}
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/* :nodoc: */
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static VALUE
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rb_hash_index(VALUE hash, VALUE value)
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| test/ruby/test_hash.rb (working copy) | ||
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def setup
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@cls = Hash
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@h = @cls[
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1 => 'one', 2 => 'two', 3 => 'three',
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1 => 'one', 2 => 'two', 3 => 'three', 4 => 'two'
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self => 'self', true => 'true', nil => 'nil',
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'nil' => nil
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]
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| ... | ... | |
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assert_equal(nil, @cls[].key('gumby'))
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end
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def test_keys_of
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assert_equal([1], @h.keys_of('one'))
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assert_equal([2, 4], @h.keys_of('two'))
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assert_equal([], @h.keys_of('nil'))
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assert_equal([], @h.keys_of('gumby'))
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assert_equal([], @cls[].keys_of('gumby'))
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end
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def test_values_at
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res = @h.values_at('dog', 'cat', 'horse')
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assert(res.length == 3)
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