English : Português

Description : Code : Example : Help : Rank

Concatenates a substring until the determinated length is reached without loops.
Created: 2005.11.20

//+ Jonas Raoni Soares Silva
//@ http://jsfromhell.com/string/pad [rev. #1]

String.prototype.pad = function(l, s, t){
    return s || (s = " "), (l -= this.length) > 0 ? (s = new Array(Math.ceil(l / s.length)
        + 1).join(s)).substr(0, t = !t ? l : t == 1 ? 0 : Math.ceil(l / 2))
        + this + s.substr(0, l - t) : this;
};

<script type="text/javascript">
//<![CDATA[

var s = "Jonas";
document.write(
    '<h2>S = '.bold(), s, "</h2>",
    'S.pad(20, "[]", 0) = '.bold(), s.pad(20, "[]", 0), "<br />",
    'S.pad(20, "[====]", 1) = '.bold(), s.pad(20, "[====]", 1), "<br />",
    'S.pad(20, "~", 2) = '.bold(), s.pad(20, "~", 2)
);

//]]>
</script>

String.pad(length: Integer, [substring: String = " "], [type: Integer = 0]): String

Returns the string with a substring padded on the left, right or both sides.

length

amount of characters that the string must have

substring

string that will be concatenated

type

specifies the side where the concatenation will happen, where: 0 = left, 1 = right and 2 = both sides

0 1 2 3 4 5