diff options
author | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-02-14 15:45:43 +0000 |
---|---|---|
committer | nobu <nobu@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2009-02-14 15:45:43 +0000 |
commit | 766df600db46f3cc8a2bd0c0af2dfceeec2d8fb3 (patch) | |
tree | 8bb6919bce8e548a62a4ce323c5075f97af91305 /array.c | |
parent | e1646e639a14f8430046dd424c1b745bea7f9840 (diff) | |
download | ruby-766df600db46f3cc8a2bd0c0af2dfceeec2d8fb3.tar.gz |
* array.c (rb_ary_uniq_bang, rb_ary_uniq): unique by the result of
given block. [ruby-dev:37998]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22307 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'array.c')
-rw-r--r-- | array.c | 91 |
1 files changed, 74 insertions, 17 deletions
@@ -2887,15 +2887,43 @@ ary_add_hash(VALUE hash, VALUE ary) return hash; } -static VALUE -ary_make_hash(VALUE ary) +static inline VALUE +ary_tmp_hash_new(void) { VALUE hash = rb_hash_new(); RBASIC(hash)->klass = 0; + return hash; +} + +static VALUE +ary_make_hash(VALUE ary) +{ + VALUE hash = ary_tmp_hash_new(); return ary_add_hash(hash, ary); } +static VALUE +ary_add_hash_by(VALUE hash, VALUE ary) +{ + long i; + + for (i = 0; i < RARRAY_LEN(ary); ++i) { + VALUE v = rb_ary_elt(ary, i), k = rb_yield(v); + if (rb_hash_lookup2(hash, k, Qundef) == Qundef) { + rb_hash_aset(hash, k, v); + } + } + return hash; +} + +static VALUE +ary_make_hash_by(VALUE ary) +{ + VALUE hash = ary_tmp_hash_new(); + return ary_add_hash_by(hash, ary); +} + static inline void ary_recycle_hash(VALUE hash) { @@ -3010,6 +3038,13 @@ rb_ary_or(VALUE ary1, VALUE ary2) return ary3; } +static int +push_value(st_data_t key, st_data_t val, st_data_t ary) +{ + rb_ary_push((VALUE)ary, (VALUE)val); + return ST_CONTINUE; +} + /* * call-seq: * array.uniq! -> array or nil @@ -3022,6 +3057,8 @@ rb_ary_or(VALUE ary1, VALUE ary2) * a.uniq! #=> ["a", "b", "c"] * b = [ "a", "b", "c" ] * b.uniq! #=> nil + * c = [ "a:def", "a:xyz", "b:abc", "b:xyz", "c:jkl" ] + * c.uniq! {|s| s[/^\w+/]} #=> [ "a:def", "b:abc", "c:jkl" ] */ static VALUE @@ -3030,18 +3067,28 @@ rb_ary_uniq_bang(VALUE ary) VALUE hash, v; long i, j; - hash = ary_make_hash(ary); - - if (RARRAY_LEN(ary) == RHASH_SIZE(hash)) { - return Qnil; + if (rb_block_given_p()) { + hash = ary_make_hash_by(ary); + if (RARRAY_LEN(ary) == (i = RHASH_SIZE(hash))) { + return Qnil; + } + ary_resize_capa(ary, i); + ARY_SET_LEN(ary, 0); + st_foreach(RHASH_TBL(hash), push_value, ary); } - for (i=j=0; i<RARRAY_LEN(ary); i++) { - st_data_t vv = (st_data_t)(v = rb_ary_elt(ary, i)); - if (st_delete(RHASH_TBL(hash), &vv, 0)) { - rb_ary_store(ary, j++, v); + else { + hash = ary_make_hash(ary); + if (RARRAY_LEN(ary) == RHASH_SIZE(hash)) { + return Qnil; } + for (i=j=0; i<RARRAY_LEN(ary); i++) { + st_data_t vv = (st_data_t)(v = rb_ary_elt(ary, i)); + if (st_delete(RHASH_TBL(hash), &vv, 0)) { + rb_ary_store(ary, j++, v); + } + } + ARY_SET_LEN(ary, j); } - ARY_SET_LEN(ary, j); ary_recycle_hash(hash); return ary; @@ -3055,19 +3102,29 @@ rb_ary_uniq_bang(VALUE ary) * * a = [ "a", "a", "b", "b", "c" ] * a.uniq #=> ["a", "b", "c"] + * c = [ "a:def", "a:xyz", "b:abc", "b:xyz", "c:jkl" ] + * c.uniq {|s| s[/^\w+/]} #=> [ "a:def", "b:abc", "c:jkl" ] */ static VALUE rb_ary_uniq(VALUE ary) { - VALUE hash = ary_make_hash(ary), v; - VALUE uniq = ary_new(rb_obj_class(ary), RHASH_SIZE(hash)); + VALUE hash, uniq, v; long i; - for (i=0; i<RARRAY_LEN(ary); i++) { - st_data_t vv = (st_data_t)(v = rb_ary_elt(ary, i)); - if (st_delete(RHASH_TBL(hash), &vv, 0)) { - rb_ary_push(uniq, v); + if (rb_block_given_p()) { + hash = ary_make_hash_by(ary); + uniq = ary_new(rb_obj_class(ary), RHASH_SIZE(hash)); + st_foreach(RHASH_TBL(hash), push_value, uniq); + } + else { + hash = ary_make_hash(ary); + uniq = ary_new(rb_obj_class(ary), RHASH_SIZE(hash)); + for (i=0; i<RARRAY_LEN(ary); i++) { + st_data_t vv = (st_data_t)(v = rb_ary_elt(ary, i)); + if (st_delete(RHASH_TBL(hash), &vv, 0)) { + rb_ary_push(uniq, v); + } } } ary_recycle_hash(hash); |