Create chain in lodash with custom functions

Issue

Is there way to get my own custom function in a chain of lodash. So for example like this:

var l = [1,2,3]
var add = function(a, b){return a+b}

var r =_.chain(l).find(function(a){return a>1}).add(5).value()

=>r = 7

Solution

What you look for is a way to extend the lodash prototype. It so nicely turns out that you can do it easily with a mixin utility function. Check here the docs:
http://lodash.com/docs#mixin

In your example it will look like:

var l = [1,2,3];
var  add = function(a, b){return a+b}


_.mixin({
    add: add 
});


var r =_.chain(l).find(function(a){return a>1}).add(5).value()
console.log(r); ==> 7

and here is live sample on fiddle: http://jsfiddle.net/g2A9C/

Answered By – stride

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