method

chr

v1_9_1_378 - Show latest stable - 0 notes - Class: Integer

chr(*args) public

Returns a string containing the character represented by the receiver’s value according to encoding.

65.chr    #=> "A"
230.chr   #=> "\346"
255.chr(Encoding::UTF_8)   #=> "\303\277"

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static VALUE
int_chr(int argc, VALUE *argv, VALUE num)
{
    char c;
    int n;
    long i = NUM2LONG(num);
    rb_encoding *enc;
    VALUE str;

    switch (argc) {
      case 0:
        if (i < 0 || 0xff < i) {
          out_of_range:
            rb_raise(rb_eRangeError, "%"PRIdVALUE " out of char range", i);
        }
        c = i;
        if (i < 0x80) {
            return rb_usascii_str_new(&c, 1);
        }
        else {
            return rb_str_new(&c, 1);
        }
      case 1:
        break;
      default:
        rb_raise(rb_eArgError, "wrong number of arguments (%d for 0 or 1)", argc);
        break;
    }
    enc = rb_to_encoding(argv[0]);
    if (!enc) enc = rb_ascii8bit_encoding();
    if (i < 0 || (n = rb_enc_codelen(i, enc)) <= 0) goto out_of_range;
    str = rb_enc_str_new(0, n, enc);
    rb_enc_mbcput(i, RSTRING_PTR(str), enc);
    return str;
}

chr

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