Linq in your browser: underscore.js

While working on an Angular application, I ended in a situation where I had to add another tool in my toolbox: underscore.js. It not only offers over 100 functions that support functional helpers like map, filter, invoke — but also has a fluent API that allows to create LINQ style queries.

An example:

	"orders":[
	{"id":1, "description":"order 1", "orderDetails":[{"nr":1},{"nr":2}]},
	{"id":2, "description":"order 2", "orderDetails":[{"nr":3},{"nr":4}]},
	{"id":3, "description":"order 3", "orderDetails":[{"nr":5},{"nr":6}]},
	]

view raw orders.json hosted with ❤ by GitHub

	var orderDetails = _
	.chain(orders)
	.pluck('orderDetails')
	.flatten()
	.unique(function (orderDetail) { return orderDetail.nr; })
	.sortBy(function (orderDetail) { return orderDetail.nr; })
	.value();

view raw underscoresample.js hosted with ❤ by GitHub