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instance method · added in Ruby 3.1

Enumerable#compact

compact → array

static VALUE
enum_compact(VALUE obj)
{
    VALUE ary;

    ary = rb_ary_new();
    rb_block_call(obj, id_each, 0, 0, compact_i, ary);

    return ary;
}

Returns an array of all non-nil elements:

Example

a = [nil, 0, nil, 'a', false, nil, false, nil, 'a', nil, 0, nil]
a.compact # => [0, "a", false, false, "a", 0]

Ruby version changes

3.1
- Enumerable#compact is added. [Feature #17312]

See also #collect_concat #count #collect #cycle also in 4.1 · 4.0 · 3.4 · 3.3 · 3.1

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