从数组中获取价值的更简单方法

Question

I have an array with a structure like:

array = [
    { id: 1001 , info: {bunch of info in here} },
    { id: 1002 , info: {bunch of info in here} }
]

is there a way I can grab all the info of id = 1002 without having to loop through the array with .each()?

Answer 1

No, but you can pre-process:

var map = {};
array.forEach(function(item) {map[item.id] = item.info;});

Then you can access properties by ID much more easily.

Answer 2

In case possible, chnage your array to map, where the key will be ID value and value will be Info.

Something like:

array[1002] = [
    { id: 1002 , info: {bunch of info in here} }
]
array[1001] = [
    { id: 1001 , info: {bunch of info in here} }
]

Answer 3

I know the tags are Javascript and Jquery only but have a look at underscorejs. It has a lot of useful stuff to work with array. Fo example where function from underscorejs would give you what you are actually trying to achive.

Hope it helps!