method

last

Ruby latest stable (v1_8_6_287) - 1 note - Class: Array

last(...) public

Returns the last element(s) of self. If the array is empty, the first form returns nil.

   [ "w", "x", "y", "z" ].last   #=> "z"

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/*
 *  call-seq:
 *     array.last     ->  obj or nil
 *     array.last(n)  ->  an_array
 *  
 *  Returns the last element(s) of <i>self</i>. If the array is empty,
 *  the first form returns <code>nil</code>.
 *     
 *     [ "w", "x", "y", "z" ].last   #=> "z"
 */

static VALUE
rb_ary_last(argc, argv, ary)
    int argc;
    VALUE *argv;
    VALUE ary;
{
    if (argc == 0) {
        if (RARRAY(ary)->len == 0) return Qnil;
        return RARRAY(ary)->ptr[RARRAY(ary)->len-1];
    }
    else {
        VALUE nv, result;
        long n, i;

        rb_scan_args(argc, argv, "01", &nv);
        n = NUM2LONG(nv);
        if (n > RARRAY(ary)->len) n = RARRAY(ary)->len;
        result = rb_ary_new2(n);
        for (i=RARRAY(ary)->len-n; n--; i++) {
            rb_ary_push(result, RARRAY(ary)->ptr[i]);
        }
        return result;
    }
}

August 18, 2008

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Last element of an array alternative

You can also access the last element of an array with -1

 [ "w", "x", "y", "z" ][-1]  #=> "z"

last

Related methods

Last element of an array alternative