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rawpatchinlineside by side (parent: 4918e5e)
rawpatchinlineside by side (parent: 4918e5e)
| author | Jun Hiroe <[email protected]> | |
| Fri, 18 Apr 2014 12:57:11 +0000 (18 21:57 +0900) | ||
| committer | Jun Hiroe <[email protected]> | |
| Fri, 18 Apr 2014 14:13:02 +0000 (18 23:13 +0900) |
| mrbgems/mruby-array-ext/mrblib/array.rb | patchblobblamehistory | |
| mrbgems/mruby-array-ext/test/array.rb | patchblobblamehistory |
class Array
##
# call-seq:
- # ary.uniq! -> ary or nil
+ # ary.uniq! -> ary or nil
+ # ary.uniq! { |item| ... } -> ary or nil
#
# Removes duplicate elements from +self+.
# Returns <code>nil</code> if no changes are made (that is, no
# a.uniq! #=> ["a", "b", "c"]
# b = [ "a", "b", "c" ]
# b.uniq! #=> nil
+ # c = [["student","sam"], ["student","george"], ["teacher","matz"]]
+ # c.uniq! { |s| s.first } # => [["student", "sam"], ["teacher", "matz"]]
#
- def uniq!
+ def uniq!(&block)
ary = self.dup
result = []
- while ary.size > 0
- result << ary.shift
- ary.delete(result.last)
+ if block
+ hash = {}
+ while ary.size > 0
+ val = ary.shift
+ key = block.call(val)
+ hash[key] = val unless hash.has_key?(key)
+ end
+ hash.each_value do |value|
+ result << value
+ end
+ else
+ while ary.size > 0
+ result << ary.shift
+ ary.delete(result.last)
+ end
end
if result.size == self.size
nil
b = [ "a", "b", "c" ]
assert_nil b.uniq!
+
+ c = [["student","sam"], ["student","george"], ["teacher","matz"]]
+ assert_equal [["student", "sam"], ["teacher", "matz"]], c.uniq! { |s| s.first }
+
+ d = [["student","sam"], ["teacher","matz"]]
+ assert_nil d.uniq! { |s| s.first }
end
assert("Array#uniq") do