Method: Kernel#Integer

Defined in:

object.c

#Integer(arg, base = 0) ⇒ Integer

Converts arg to a Fixnum or Bignum. Numeric types are converted directly (with floating point numbers being truncated). base (0, or between 2 and 36) is a base for integer string representation. If arg is a String, when base is omitted or equals zero, radix indicators (0, 0b, and 0x) are honored. In any case, strings should be strictly conformed to numeric representation. This behavior is different from that of String#to_i. Non string values will be converted by first trying to_int, then to_i. Passing nil raises a TypeError.

Integer(123.999)    #=> 123
Integer("0x1a")     #=> 26
Integer(Time.new)   #=> 1204973019
Integer("0930", 10) #=> 930
Integer("111", 2)   #=> 7
Integer(nil)        #=> TypeError

Returns:

• (Integer)

# File 'object.c', line 2787

static VALUE
rb_f_integer(int argc, VALUE *argv, VALUE obj)
{
    VALUE arg = Qnil;
    int base = 0;

    switch (argc) {
      case 2:
	base = NUM2INT(argv[1]);
      case 1:
	arg = argv[0];
	break;
      default:
	/* should cause ArgumentError */
	rb_scan_args(argc, argv, "11", NULL, NULL);
    }
    return rb_convert_to_integer(arg, base);
}