method

to_i

v1_8_6_287 - Show latest stable - 0 notes - Class: String

to_i(...) public

Returns the result of interpreting leading characters in str as an integer base base (2, 8, 10, or 16). Extraneous characters past the end of a valid number are ignored. If there is not a valid number at the start of str, 0 is returned. This method never raises an exception.

   "12345".to_i             #=> 12345
   "99 red balloons".to_i   #=> 99
   "0a".to_i                #=> 0
   "0a".to_i(16)            #=> 10
   "hello".to_i             #=> 0
   "1100101".to_i(2)        #=> 101
   "1100101".to_i(8)        #=> 294977
   "1100101".to_i(10)       #=> 1100101
   "1100101".to_i(16)       #=> 17826049

Show source

/*
 *  call-seq:
 *     str.to_i(base=10)   => integer
 *  
 *  Returns the result of interpreting leading characters in <i>str</i> as an
 *  integer base <i>base</i> (2, 8, 10, or 16). Extraneous characters past the
 *  end of a valid number are ignored. If there is not a valid number at the
 *  start of <i>str</i>, <code>0</code> is returned. This method never raises an
 *  exception.
 *     
 *     "12345".to_i             #=> 12345
 *     "99 red balloons".to_i   #=> 99
 *     "0a".to_i                #=> 0
 *     "0a".to_i(16)            #=> 10
 *     "hello".to_i             #=> 0
 *     "1100101".to_i(2)        #=> 101
 *     "1100101".to_i(8)        #=> 294977
 *     "1100101".to_i(10)       #=> 1100101
 *     "1100101".to_i(16)       #=> 17826049
 */

static VALUE
rb_str_to_i(argc, argv, str)
    int argc;
    VALUE *argv;
    VALUE str;
{
    VALUE b;
    int base;

    rb_scan_args(argc, argv, "01", &b);
    if (argc == 0) base = 10;
    else base = NUM2INT(b);

    if (base < 0) {
        rb_raise(rb_eArgError, "illegal radix %d", base);
    }
    return rb_str_to_inum(str, base, Qfalse);
}

to_i

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