Method: Array#map!

Defined in:
array.c

#collect! {|element| ... } ⇒ Object #collect! ⇒ Object #map! {|element| ... } ⇒ Object #map! ⇒ Object

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

a = [:foo, 'bar', 2]
a.map! { |element| element.class } # => [Symbol, String, Integer]

With no block given, returns a new Enumerator.

Related: #collect; see also Methods for Converting.

Overloads:

  • #collect! {|element| ... } ⇒ Object

    Yields:

    • (element)
  • #map! {|element| ... } ⇒ Object

    Yields:

    • (element) 


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# File 'array.c', line 3671

static VALUE
rb_ary_collect_bang(VALUE ary)
{
    long i;

    RETURN_SIZED_ENUMERATOR(ary, 0, 0, ary_enum_length);
    rb_ary_modify(ary);
    for (i = 0; i < RARRAY_LEN(ary); i++) {
        rb_ary_store(ary, i, rb_yield(RARRAY_AREF(ary, i)));
    }
    return ary;
}