method

unshift

v1_9_3_392 - Show latest stable - 1 note - Class: Array

unshift(*args) public

Prepends objects to the front of self, moving other elements upwards.

a = [ "b", "c", "d" ]
a.unshift("a")   #=> ["a", "b", "c", "d"]
a.unshift(1, 2)  #=> [ 1, 2, "a", "b", "c", "d"]

Show source

static VALUE
rb_ary_unshift_m(int argc, VALUE *argv, VALUE ary)
{
    long len;

    rb_ary_modify(ary);
    if (argc == 0) return ary;
    if (ARY_CAPA(ary) <= (len = RARRAY_LEN(ary)) + argc) {
        ary_double_capa(ary, len + argc);
    }

    /* sliding items */
    MEMMOVE(RARRAY_PTR(ary) + argc, RARRAY_PTR(ary), VALUE, len);
    MEMCPY(RARRAY_PTR(ary), argv, VALUE, argc);
    ARY_INCREASE_LEN(ary, argc);

    return ary;
}

February 11, 2010 - (v1_8_6_287 - v1_8_7_72)

1 thank

Using Unshift with Load Path's

Using unshift on your load path’s for Rails, Sinatra, etc, is a good way of ensuring that the file your including is going to be first.

Example

vendor = File.join(File.dirname(__FILE__), 'vendor')
$LOAD_PATH.unshift File.expand_path(File.join(vendor, 'ultraviolet-0.10.5',  'lib'))

unshift

Related methods

Using Unshift with Load Path's

Example