Globals

Globals.js

function Pure(fn, context) {
    this.context = context;
    eval('this.fn=' + fn.toString());
}

Pure.prototype.withGlobals = function(useGlobals) {
    this.useGlobals = 1;
    return this;
}
Pure.prototype.use = function(vars) {
    if (!this.useGlobals) {
        var windowVars = [];
        for (var w in window) {
            if (w.indexOf(['console']) < 0)
                windowVars.push(w);
        }
        eval('var ' + windowVars.join(',') + ';');
    }
    for (var i in vars) {
        eval('var ' + i + ' = vars[i]');
    }
    eval('this.fn=' + this.fn.toString());
    if (this.context) {
        this.fn = this.fn.bind(this.context);
    }
    return this.fn;
}