The Lo-Dash JavaScript library provides us with a huge range of utility functions we can use in our code. Most functions will look familiar if you already have experience using functional programming languages. If you are already familiar with Underscore.js you will find this library very easy to learn.
The following code sample shows how simple it is to use this library. The following code sample shows how we can create new arrays based on arrays that already exist by using the _.map function.
<!DOCTYPE html>
<html>
<head>
<title>lodash demo</title>
<script type="text/javascript"
src="http://ajax.googleapis.com/ajax/libs/jquery/1.10.2/jquery.min.js">
</script>
<script type="text/javascript" src="lodash.js"></script>
</head>
<body>
<script type="text/javascript">
var vecA = [1,2,3,4,5];
var vecB = _.map(vecA, function(num) { return num * 2; });
for(var i=0; i<vecB.length; i++)
{
document.write("<br>"+vecB[i]);
}
</script>
</body>
</html>
The following video clip overviews the code above, shows its execution and explains each and every part of it.
You can find more video clips, code samples and training material for learning this JavaScript library in my Lo-Dash Basics new course at http://abelski.lifemichael.com.
