instance method
Hash#delete_if
() { (K, V) -> ::boolish } -> self
() -> ::Enumerator[[ K, V ], self]
delete_if {|key, value| ... } → self
delete_if → new_enumerator
hash.c
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VALUE
rb_hash_delete_if(VALUE hash)
{
RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
rb_hash_modify_check(hash);
if (!RHASH_TABLE_EMPTY_P(hash)) {
rb_hash_foreach(hash, delete_if_i, hash);
compact_after_delete(hash);
}
return hash;
}
With a block given, calls the block with each key-value pair, deletes each entry for which the block returns a truthy value, and returns self:
Example
h = {foo: 0, bar: 1, baz: 2} h.delete_if {|key, value| value > 0 } # => {foo: 0}
With no block given, returns a new Enumerator.
Related: see Methods for Deleting.