method

rpartition

v1_8_7_330 - Show latest stable - 1 note - Class: String

rpartition(p1) public

Searches sep in the string from the end of the string, and returns the part before it, the sep, and the part after it. If sep is not found, returns two empty strings and str.

"hello".rpartition("l")         #=> ["hel", "l", "o"]
"hello".rpartition("x")         #=> ["", "", "hello"]

Show source

/*
 *  call-seq:
 *     str.rpartition(sep)            => [head, sep, tail]
 *  
 *  Searches <i>sep</i> in the string from the end of the string, and
 *  returns the part before it, the <i>sep</i>, and the part after it.
 *  If <i>sep</i> is not found, returns two empty strings and
 *  <i>str</i>.
 *     
 *     "hello".rpartition("l")         #=> ["hel", "l", "o"]
 *     "hello".rpartition("x")         #=> ["", "", "hello"]
 */

static VALUE
rb_str_rpartition(str, sep)
    VALUE str;
    VALUE sep;
{
    long pos = RSTRING(str)->len;

    if (TYPE(sep) != T_REGEXP) {
        VALUE tmp;

        tmp = rb_check_string_type(sep);
        if (NIL_P(tmp)) {
            rb_raise(rb_eTypeError, "type mismatch: %s given",
                     rb_obj_classname(sep));
        }
        sep = get_arg_pat(tmp);
    }
    pos = rb_reg_search(sep, str, pos, 1);
    if (pos < 0) {
        return rb_ary_new3(3, rb_str_new(0,0),rb_str_new(0,0), str);
    }
    sep = rb_reg_nth_match(0, rb_backref_get());
    return rb_ary_new3(3, rb_str_substr(str, 0, pos),
                          sep,
                          rb_str_substr(str, pos+RSTRING(sep)->len,
                                             RSTRING(str)->len-pos-RSTRING(sep)->len));
}

March 19, 2014 - (v1_8_6_287 - v1_9_3_392)

1 thank

Right Partitioning Filename extension

1.9.3p392 :013 > x = “picture.2.jpg”

=> "picture.2.jpg"

1.9.3p392 :015 > x.rpartition(‘.’)

=> ["picture.2", ".", "jpg"]

rpartition

Related methods

Right Partitioning Filename extension