Posted By

jswaringen on 10/17/12

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javascript

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Last Edited at 10/17/12 02:11am

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JavaScript: StringBuilder

/ Published in: JavaScript

Emulates the StringBuilder() function found in .NET Languages

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/*****************************************************************
 * Stringbuilder Class - emulates the C#/VB.NET stringbuilder
 * @constructor
 *****************************************************************/
function StringBuilder() {
    var strings = [];

this.append = function (string)
    {
        string = verify(string);
        if (string.length > 0) {
            strings[strings.length] = string;
        }
    };

this.appendLine = function (string)
    {
        string = verify(string);
        if (this.isEmpty())
        {
            if (string.length > 0) {
                strings[strings.length] = string;
            }
            else {
                return;
            }
        }
        else {
            strings[strings.length] = string.length > 0 ? "
" + string : "
";
        }
    };

this.clear = function () { strings = []; };

this.isEmpty = function () { return strings.length == 0; };

this.toString = function () { return strings.join(""); };

var defined = function (el)
    {
        return el != null && typeof(el) != "undefined";
    };

var getType = function (instance)
    {
        if (!defined(instance.constructor)) {
            throw new Error("Unexpected object type");
        }
        var type = String(instance.constructor).match(/function\s+(\w+)/);

return defined(type) ? type[1] : "undefined";
    };
}

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