static mrb_value
mrb_hash_shift(mrb_state *mrb, mrb_value hash)
{
khash_t(ht) *h = RHASH_TBL(hash);
khiter_t k;
mrb_value delKey, delVal;
mrb_hash_modify(mrb, hash);
if (h) {
if (kh_size(h) > 0) {
for (k = kh_begin(h); k != kh_end(h); k++) {
if (!kh_exist(h,k)) continue;
delKey = kh_key(h,k);
mrb_gc_protect(mrb, delKey);
delVal = mrb_hash_delete_key(mrb, hash, delKey);
mrb_gc_protect(mrb, delVal);
return mrb_assoc_new(mrb, delKey, delVal);
}
}
}
if (MRB_RHASH_PROCDEFAULT_P(hash)) {
return mrb_funcall(mrb, RHASH_PROCDEFAULT(hash), "call", 2, hash, mrb_nil_value());
}
else {
return RHASH_IFNONE(hash);
}
}
/*
* call-seq:
* hsh.delete(key) -> value
* hsh.delete(key) {| key | block } -> value
*
* Deletes and returns a key-value pair from <i>hsh</i> whose key is
* equal to <i>key</i>. If the key is not found, returns the
* <em>default value</em>. If the optional code block is given and the
* key is not found, pass in the key and return the result of
* <i>block</i>.
*
* h = { "a" => 100, "b" => 200 }
* h.delete("a") #=> 100
* h.delete("z") #=> nil
* h.delete("z") { |el| "#{el} not found" } #=> "z not found"
*
*/
static mrb_value
mrb_hash_delete(mrb_state *mrb, mrb_value self)
{
mrb_value key;
mrb_get_args(mrb, "o", &key);
return mrb_hash_delete_key(mrb, self, key);
}
void
nstringhash_delete(nstringhash *hash, const char *key)
{
mrb_hash_delete_key(__LIBN_R, hash->_hash,
mrb_str_new_cstr(__LIBN_R, key));
}