Remember JSUtil? Its a cool script include to do a lot of Javascript! To scratch an itch, and to do some more, I wrote(ported) another Script Include called JSUtil2, which is kinda port of Underscore.js.Hope you will find it useful:

/* * JSUtil already has some utility functions, Some more utility functions. * Written by diddigiabhi@gmail.com * Re-written for Service Now from underscore.js: http://underscorejs.org/ * */ var JSUtil2 = Class.create(); //Setting the version. JSUtil2.version = 0.1; //Collection functions start here//Checks if an object is empty//String,Arrays,Objects can be passed.JSUtil2.isEmpty = function(obj){ if(typeof obj == 'string' || obj == 'array') return obj.length === 0; for (var key in obj) if (! JSUtil2.has(obj, key)) return false ; return true; };//Checks if a key belongs to an Object//JSUtil has a method contains, you can either use that or this.JSUtil2.has = function(obj,key){ return hasOwnProperty.call(obj, key); };// One of the important functions,iterates over a given object as// per a given iterator.We don't use context much in Service Now, But if// you want to, pass it as 3rd parameter.JSUtil2.each = function(obj,iterator,context){ if(JSUtil.nil(obj)) {gs.log("JSUtil2 Error: Object not defined.");return;} if (typeof obj.length == 'number' ) { for (var i = 0, l = obj.length; i < l; i++) { if (iterator.call(context, obj, i, obj) === {}) return; } } else { for (var key in obj) { if (JSUtil2.has(obj, key)) { if (iterator.call(context, obj[key], key, obj) === {}) return; } } }};//produces a new array of values as per the iterator function defined.JSUtil2.map = function(obj, iterator, context){ var results = []; JSUtil2.each(obj, function(value,key,list){ results.push( iterator.call(context, value, key, list)); }); return results; };// properties is an array of key:value pairs. Find checks if the given Array of objects// has those properties, and outputs those objects as array of objects.JSUtil2.find = function(obj,properties){ //Properties is a JSON Object if(typeof properties != 'object') { gs.log("JSUtil2 Error: Properties are not Object."); return false; } for(var i in properties){//First check if the key is present in the object, if yes, then check if has the value that is specified.if(JSUtil2.has(obj,i) && obj == properties){ //do nothing continue; } else{ return false; } } return true; };//Looks through all the values of the object and return those//which satisfy the iterator defined.JSUtil2.filter = function(obj, iterator, context){ var retArr = []; if(JSUtil.nil(obj)) return; JSUtil2.each(obj, function(value, index , list){ if(iterator.call(context, value, index, list)) { retArr.push(value);} }); JSUtil.logObject(retArr); return retArr; };//Underscore.js's implementation of JSUtil2's find.JSUtil2.where = function(obj, properties){ if(JSUtil2.isEmpty(obj)) return []; return JSUtil2.filter(obj, function(value) { for (var key in properties) { if (properties[key] !== value[key]){return false;} } return true; }); };//extracts list of property values.JSUtil2.pluck = function(obj, key){ return JSUtil2.map(obj, function(value){ return value[key]; }); };// Array functions start here//Checks if the passed object is an arrayJSUtil2.checkArray = function(arr){ return JSUtil.notNil(arr) && typeof arr == 'object' && typeof (arr.length) == 'number';};//If n is specified, it returns first n items in the array.JSUtil2.first = function(arr,n){ if(! JSUtil2.checkArray(arr)) return '-infinity' ; if(arr.length == 0) return '-infinity'; return (n != null)? arr.slice( 0, n) : arr[0]; };//return the last item if n is not specified, else retuns n -last characters.JSUtil2.last = function(arr,n){ if(! JSUtil2.checkArray(arr)) return '-infinity' ; if(arr.length == 0) return '-infinity'; return (n != null)? arr.slice((arr.length-n), arr.length) : arr[arr.length-1]; };//Removes all the 'falsy' values returned. false,0,null,'', nan and undefined are//falsy values in Javascript.JSUtil2.compact = function(arg){ return JSUtil2.filter(arg, function(value){ return value; } ); };