Method: Hash#transform_values!

Defined in:

hash.c

#transform_values! {|value| ... } ⇒ Hash #transform_values! ⇒ Object

Invokes the given block once for each value in hsh, replacing it with the new value returned by the block, and then returns hsh. This method does not change the keys.

h = { a: 1, b: 2, c: 3 }
h.transform_values! {|v| v * v + 1 }  #=> { a: 2, b: 5, c: 10 }
h.transform_values!(&:to_s)           #=> { a: "2", b: "5", c: "10" }
h.transform_values!.with_index {|v, i| "#{v}.#{i}" }
                                      #=> { a: "2.0", b: "5.1", c: "10.2" }

If no block is given, an enumerator is returned instead.

Overloads:

• #transform_values! {|value| ... } ⇒ Hash

  Yields:

  • (value)

  Returns:

  • (Hash)

# File 'hash.c', line 3165

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)) {
        rb_hash_stlike_foreach_with_replace(hash, transform_values_foreach_func, transform_values_foreach_replace, 0);
    }

    return hash;
}