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author | Nobuyoshi Nakada <nobu@ruby-lang.org> | 2021-03-28 09:48:45 +0900 |
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committer | Nobuyoshi Nakada <nobu@ruby-lang.org> | 2021-03-28 09:48:45 +0900 |
commit | fb6ebe55d91187d9635e0183d47dbf38e95b1141 (patch) | |
tree | e6544df386d120b3a9218643873725a2af0197c1 | |
parent | 5e5fb72f99701dc27c66ab148471893f14e6d6f0 (diff) |
Hide an intermediate array
-rw-r--r-- | hash.c | 6 |
1 files changed, 4 insertions, 2 deletions
@@ -3239,7 +3239,7 @@ rb_hash_transform_keys(int argc, VALUE *argv, VALUE hash) return result; } -static VALUE rb_hash_flatten(int argc, VALUE *argv, VALUE hash); +static int flatten_i(VALUE key, VALUE val, VALUE ary); /* * call-seq: @@ -3269,7 +3269,8 @@ rb_hash_transform_keys_bang(int argc, VALUE *argv, VALUE hash) if (!RHASH_TABLE_EMPTY_P(hash)) { long i; VALUE new_keys = hash_alloc(0); - VALUE pairs = rb_hash_flatten(0, NULL, hash); + VALUE pairs = rb_ary_tmp_new(RHASH_SIZE(hash) * 2); + rb_hash_foreach(hash, flatten_i, pairs); for (i = 0; i < RARRAY_LEN(pairs); i += 2) { VALUE key = RARRAY_AREF(pairs, i), new_key, val; @@ -3292,6 +3293,7 @@ rb_hash_transform_keys_bang(int argc, VALUE *argv, VALUE hash) rb_hash_aset(hash, new_key, val); rb_hash_aset(new_keys, new_key, Qnil); } + rb_ary_clear(pairs); rb_hash_clear(new_keys); } return hash; |