instance method

Hash#transform_values!

() -> ::Enumerator[V, self]

() { (V) -> V } -> self

transform_values! {|old_value| ... } → self

transform_values! → new_enumerator

static VALUE
rb_hash_transform_values_bang(VALUE hash)
{
    RETURN_SIZED_ENUMERATOR(hash, 0, 0, hash_enum_size);
    rb_hash_modify_check(hash);

    if (!RHASH_TABLE_EMPTY_P(hash)) {
        transform_values(hash);
    }

    return hash;
}

With a block given, changes the values of self as determined by the block; returns self.

For each entry key/old_value in self, calls the block with old_value, captures its return value as new_value, and sets self[key] = new_value:

Example

h = {foo: 0, bar: 1, baz: 2}
h.transform_values! {|value| value * 100} # => {foo: 0, bar: 100, baz: 200}

With no block given, returns a new Enumerator.

See also #transform_values #update #transform_keys! #value? also in 4.1 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

‹ prev#transform_values next ›#update