PC/packages/linq.js.3.0.1-beta2/Content/Scripts/linq.js

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/*--------------------------------------------------------------------------
 * linq.js - LINQ for JavaScript
 * ver 3.0.1-Beta2 (July. 26th, 2012)
 *
 * created and maintained by neuecc <ils@neue.cc>
 * licensed under MIT License
 * http://linqjs.codeplex.com/
 *------------------------------------------------------------------------*/

(function (root, undefined) {
    // ReadOnly Function
    var Functions = {
        Identity: function (x) { return x; },
        True: function () { return true; },
        Blank: function () { }
    };

    // const Type
    var Types = {
        Boolean: typeof true,
        Number: typeof 0,
        String: typeof "",
        Object: typeof {},
        Undefined: typeof undefined,
        Function: typeof function () { }
    };

    // private utility methods
    var Utils = {
        // Create anonymous function from lambda expression string
        createLambda: function (expression) {
            if (expression == null) return Functions.Identity;
            if (typeof expression == Types.String) {
                if (expression == "") {
                    return Functions.Identity;
                }
                else if (expression.indexOf("=>") == -1) {
                    var regexp = new RegExp("[$]+", "g");

                    var maxLength = 0;
                    var match;
                    while (match = regexp.exec(expression)) {
                        var paramNumber = match[0].length;
                        if (paramNumber > maxLength) {
                            maxLength = paramNumber;
                        }
                    }

                    var argArray = [];
                    for (var i = 1; i <= maxLength; i++) {
                        var dollar = "";
                        for (var j = 0; j < i; j++) {
                            dollar += "$";
                        }
                        argArray.push(dollar);
                    }

                    var args = Array.prototype.join.call(argArray, ",");

                    return new Function(args, "return " + expression);