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instance method

Set#collect!

() { (A) -> A } -> self

collect! {|element| ... } → self

collect! → enumerator

static VALUE
set_i_collect(VALUE set)
{
    RETURN_SIZED_ENUMERATOR(set, 0, 0, set_enum_size);
    rb_check_frozen(set);

    VALUE new_set = set_s_alloc(rb_obj_class(set));
    if (RSET_COMPARE_BY_IDENTITY(set)) {
        set_i_compare_by_identity(new_set);
    }
    set_iter(set, set_collect_i, (st_data_t)new_set);
    set_i_initialize_copy(set, new_set);

    return set;
}

With a block given, calls the block with each element in self; replaces the element with the block’s return value:

Example

Set[1, :one, 'one', 1.0].collect! {|element| element.class }
# => Set[Integer, Symbol, String, Float]

With no block given, returns an Enumerator.

Related: see Methods for Converting.

See also #clear #compare_by_identity #classify #compare_by_identity? also in 4.0 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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