从数组中的所有javascript对象添加特定属性的值

Question

I have an array of javascript objects:

var myObjects = [{figure: 3}, {figure: 5}, {figure: 2}];

I would like code that could give me a total of 10 based on the addition of all figure properties of objects in myObjects .

What I've Tried/Done

I could loop through using jQuery's .each() but I don't feel like iterating (and using a temporary 'store' variable) is the most elegant.

Obviously I could also do:

myObjects[0] + myObjects[1] etc. - but assume there is an arbitrary amount of objects.

I've done something similar for getting the minimum already:

var lowest = Math.min.apply(null, myObjects.map(function (x) { return x['figure']; }));

But would like the equivalent for total.

Answer 1

You could use Array.prototype.reduce :

var data = [{figure: 3}, {figure: 5}, {figure: 2}],
    sum = data.reduce(function(memo, c) { return memo + c.figure }, 0);

reduce is part of ECMAScript 5, so it is available in IE9+ and recent versions of all other browsers - see this compatibility table .