JavaScript StringBuilder

a simple StringBuilder class that pushes individual strings into an array and then uses the join method to produce the concatenated output string.

	/ Initializes a new instance of the StringBuilder class
	// and appends the given value if supplied
	function StringBuilder(value)
	{
	this.strings = new Array("");
	this.append(value);
	}
	// Appends the given value to the end of this instance.
	StringBuilder.prototype.append = function (value)
	{
	if (value)
	{
	this.strings.push(value);
	}
	}
	// Clears the string buffer
	StringBuilder.prototype.clear = function ()
	{
	this.strings.length = 1;
	}
	// Converts this instance to a String.
	StringBuilder.prototype.toString = function ()
	{
	return this.strings.join("");
	}

view raw StringBuilder.cs hosted with ❤ by GitHub

The code is simple and straightforward that it should be self-explanatory. Now here's an example of how to use it:

// create a StringBuilder
var sb = new StringBuilder();

// append some text
sb.append("Lorem ipsum dolor sit amet, consectetuer adipiscing elit, ");
sb.append("sed diem nonummy nibh euismod tincidunt ut lacreet dolore ");
sb.append("magna aliguam erat volutpat.");

// get the full string value
var s = sb.toString();