method

reverse

Ruby latest stable (v1_8_6_287) - 0 notes - Class: String

1_8_6_287 (0)
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reverse() public

Returns a new string with the characters from str in reverse order.

   "stressed".reverse   #=> "desserts"

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/*
 *  call-seq:
 *     str.reverse   => new_str
 *  
 *  Returns a new string with the characters from <i>str</i> in reverse order.
 *     
 *     "stressed".reverse   #=> "desserts"
 */

static VALUE
rb_str_reverse(str)
    VALUE str;
{
    VALUE obj;
    char *s, *e, *p;

    if (RSTRING(str)->len <= 1) return rb_str_dup(str);

    obj = rb_str_new5(str, 0, RSTRING(str)->len);
    s = RSTRING(str)->ptr; e = s + RSTRING(str)->len - 1;
    p = RSTRING(obj)->ptr;

    while (e >= s) {
        *p++ = *e--;
    }
    OBJ_INFECT(obj, str);

    return obj;
}

reverse

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