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* enum.c (enum_find_index): a new method Enumerable#find_index.

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[ruby-talk:178495]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9898 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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matz 2006-02-05 15:26:53 +00:00
parent 84aa2febd6
commit 6458906292
2 changed files with 45 additions and 0 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
Mon Feb 6 00:14:57 2006 Yukihiro Matsumoto <matz@ruby-lang.org>
* enum.c (enum_find_index): a new method Enumerable#find_index.
[ruby-talk:178495]
Sun Feb 5 23:29:31 2006 Tanaka Akira <akr@m17n.org>
* ruby.h (struct RStruct): embed 3 or less elements structs.

40
enum.c
View file

@ -165,6 +165,45 @@ enum_find(int argc, VALUE *argv, VALUE obj)
return Qnil;
}
static VALUE
find_index_i(VALUE i, VALUE *memo)
{
if (RTEST(rb_yield(i))) {
memo[0] = UINT2NUM(memo[1]);
rb_iter_break();
}
memo[1]++;
return Qnil;
}
/*
* call-seq:
* enum.find_index(ifnone = nil) {| obj | block } => int
*
* Passes each entry in <i>enum</i> to <em>block</em>. Returns the
* index for the first for which <em>block</em> is not <code>false</code>.
* If no object matches, returns <code>nil</code>
*
* (1..10).find_index {|i| i % 5 == 0 and i % 7 == 0 } #=> nil
* (1..100).find_index {|i| i % 5 == 0 and i % 7 == 0 } #=> 35
*
*/
static VALUE
enum_find_index(VALUE obj)
{
VALUE memo[2];
RETURN_ENUMERATOR(obj, 0, 0);
memo[0] = Qundef;
memo[1] = 0;
rb_block_call(obj, id_each, 0, 0, find_index_i, (VALUE)memo);
if (memo[0] != Qundef) {
return memo[0];
}
return Qnil;
}
static VALUE
find_all_i(VALUE i, VALUE ary)
{
@ -1173,6 +1212,7 @@ Init_Enumerable(void)
rb_define_method(rb_mEnumerable,"count", enum_count, -1);
rb_define_method(rb_mEnumerable,"find", enum_find, -1);
rb_define_method(rb_mEnumerable,"detect", enum_find, -1);
rb_define_method(rb_mEnumerable,"find_index", enum_find_index, 0);
rb_define_method(rb_mEnumerable,"find_all", enum_find_all, 0);
rb_define_method(rb_mEnumerable,"select", enum_find_all, 0);
rb_define_method(rb_mEnumerable,"reject", enum_reject, 0);