instance method

Array#reject!

() { (Elem item) -> ::boolish } -> self?

() -> ::Enumerator[Elem, self?]

reject! {|element| ... } → self or nil

reject! → new_enumerator

static VALUE
rb_ary_reject_bang(VALUE ary)
{
    RETURN_SIZED_ENUMERATOR(ary, 0, 0, ary_enum_length);
    rb_ary_modify(ary);
    return ary_reject_bang(ary);
}

With a block given, calls the block with each element of self; removes each element for which the block returns a truthy value.

Returns self if any elements removed:

Example

a = [:foo, 'bar', 2, 'bat']
a.reject! {|element| element.to_s.start_with?('b') } # => [:foo, 2]

Returns nil if no elements removed.

With no block given, returns a new Enumerator.

Related: see Methods for Deleting.

See also #reject #repeated_combination #rassoc #repeated_permutation also in 4.1 · 3.4 · 3.3 · 3.2 · 3.1 · 3.0

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