Stop writing For loops. Start using underscore

Underscore:

Underscore.js is a JavaScript library which provides utility functions for common programming tasks. It is comparable to features provided by Prototype.js and the Ruby language, but opts for a functional programming design instead of extending object prototypes.

Underscore consists of a little more than 100 functions, which fall under four main categories depending on the datatypes which they manipulate: functions for manipulating arrays, functions for manipulating objects, functions for manipulating both arrays and objects (the name of the category is "Collections") and functions for manipulating other functions. There are also two utility categories : "Utility" and "Chaining".

Example:
for example if we use javascript to achieve some functionality we need to write the  below loop
var i,result = [];
for(i = 0; i < myArray.length; i++) {
  var myObject = myArray[i];
  if(myObject.isAwesome === true) {
      result.push(myArray[i]);
  }
}

The same functionality i can achieve  with underscore.js without loop.

var result = _.filter(myArray, function(myObject) {
  return myObject.isAwesome === true;
})

Underscore Reference : (http://underscorejs.org/)