Method: Array#map

Defined in:
array.c

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

Calls the block, if given, with each element of self; returns a new Array whose elements are the return values from the block:

a = [:foo, 'bar', 2]
a1 = a.map {|element| element.class }
a1 # => [Symbol, String, Integer]

Returns a new Enumerator if no block given:

a = [:foo, 'bar', 2]
a1 = a.map
a1 # => #<Enumerator: [:foo, "bar", 2]:map>

Array#collect is an alias for Array#map.

Overloads:

  • #map {|element| ... } ⇒ Object

    Yields:

    • (element) 


3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
 
# File 'array.c', line 3626

static VALUE
rb_ary_collect(VALUE ary)
{
    long i;
    VALUE collect;

    RETURN_SIZED_ENUMERATOR(ary, 0, 0, ary_enum_length);
    collect = rb_ary_new2(RARRAY_LEN(ary));
    for (i = 0; i < RARRAY_LEN(ary); i++) {
        rb_ary_push(collect, rb_yield(RARRAY_AREF(ary, i)));
    }
    return collect;
}