Use array as sort order

Question

I want to use an array of strings as template how to order other arrays.

var sort = ["this","is","my","custom","order"];

and then i want to sort an array of objects depending on a key (content) by that order:

var myObjects = [
    {"id":1,"content":"is"},
    {"id":2,"content":"my"},
    {"id":3,"content":"this"},
    {"id":4,"content":"custom"},
    {"id":5,"content":"order"}
];

so that my result is:

sortedObject = [
    {"id":3,"content":"this"},        
    {"id":1,"content":"is"},
    {"id":2,"content":"my"},
    {"id":4,"content":"custom"},
    {"id":5,"content":"order"}    
];

how would i do that?

Answer 1

You can do something like this with help of sort() and indexOf()

 var sort = ["this", "is", "my", "custom", "order"]; var myObjects = [{ "id": 1, "content": "is" }, { "id": 2, "content": "my" }, { "id": 3, "content": "this" }, { "id": 4, "content": "custom" }, { "id": 5, "content": "order" }]; var sortedObj = myObjects.sort(function(a, b) { return sort.indexOf(a.content) - sort.indexOf(b.content); }); document.write('<pre>' + JSON.stringify(sortedObj, null, 3) + '</pre>'); 

Answer 2

you need to use .map

 var sort = ["this", "is", "my", "custom", "order"]; var myObjects = [{ "id": 1, "content": "is" }, { "id": 2, "content": "my" }, { "id": 3, "content": "this" }, { "id": 4, "content": "custom" }, { "id": 5, "content": "order" }]; var myObjectsSort = sort.map(function(e, i) { for (var i = 0; i < myObjects.length; ++i) { if (myObjects[i].content == e) return myObjects[i]; } }); document.write('<pre>' + JSON.stringify(myObjectsSort , null, 3) + '</pre>'); 

Answer 3

Create a new array and place the every object from myObjects considering index of the sort

Try this:

 var sort = ["this", "is", "my", "custom", "order"]; var myObjects = [{ "id": 1, "content": "is" }, { "id": 2, "content": "my" }, { "id": 3, "content": "this" }, { "id": 4, "content": "custom" }, { "id": 5, "content": "order" }]; var newArr = []; myObjects.forEach(function(item) { var index = sort.indexOf(item.content); newArr[index] = item; }); console.log(newArr); 

 <script src="http://gh-canon.github.io/stack-snippet-console/console.min.js"></script> 

Answer 4

I suggest to use an object for the storing of the sort order.

 var sort = ["this", "is", "my", "custom", "order"], sortObj = {}, myObjects = [{ "id": 1, "content": "is" }, { "id": 2, "content": "my" }, { "id": 3, "content": "this" }, { "id": 4, "content": "custom" }, { "id": 5, "content": "order" }]; sort.forEach(function (a, i) { sortObj[a] = i; }); myObjects.sort(function (a, b) { return sortObj[ a.content] - sortObj[ b.content]; }); document.write('<pre>' + JSON.stringify(myObjects, 0, 4) + '</pre>');