node.js module for specific block of code

Question

node.js module for specific block of code

I have a specific block of code (the forEach loop) that I use all over the place in my code base, whenever I have an "item".

How can I refactor this into a module or a global function that I can call whenever I need to.

Here's the context:

Item.findById(itemid).populate('wants').exec(function(err, item){
        item.wants.forEach(function(person){
            person.avatar = gravatar.url(person.email, {size: 80, default: 'mm' });
        });

       //do some more stuff with item
});

I want to re-use this forEach loop in other places where I have an "item" object. I'm thinking I pass in the item object and return it again.

    item.wants.forEach(function(person){
        person.avatar = gravatar.url(person.email, {size: 80, default: 'mm' });
    });

Something like:

var myLib = require('./lib/myLib');
...
item = myLib.doStuff( item );

node.js

Answer 1

Your ./lib/myLib.js file would look like this:

module.exports.doStuff = function(item) {
    item.wants.forEach(function(person){
        person.avatar = gravatar.url(person.email, {size: 80, default: 'mm' });
    });
    return item;
}

You can then require and use like you outlined already:

var myLib = require('./lib/myLib');
item = myLib.doStuff( item );