CODEWITHSUNDEEP
javascriptarraysecmascript-6
Jeka
Jeka

Reputation: 1690

Javascript Arbitrary sort array based on values of a field

So I have an array of object which looks like this:

var myArray = [{priority : "low"}, {priority: "critical"}, {priority: "high"}]

I need to sort in this way: 1)Critical, 2) High and 3) Low.

how can this be done?

Upvotes: 2

Views: 918

Answers (2)

Nina Scholz
Nina Scholz

Reputation: 386654

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

If you need a default value for sorting, you could use a value for sorting unknown priority to start or to the end.

var sort = ['critical', 'high', 'low'],
    defaultValue = Infinity,
    sortObj = {},
    myArray = [{ priority: "unknown" }, { priority: "low" }, { priority: "critical" }, { priority: "high" }];

sort.forEach(function (a, i) { sortObj[a] = i + 1; });

myArray.sort(function (a, b) {
    return (sortObj[a.priority] || defaultValue) - (sortObj[b.priority] || defaultValue);
});
	
console.log(myArray);

Upvotes: 7

Barmar
Barmar

Reputation: 781096

Use an object that maps priority names to numbers, then sort based on that.

var priorities = {
  low: 0,
  high: 1,
  critical: 2
};

var myArray = [{
  priority: "low"
}, {
  priority: "critical"
}, {
  priority: "high"
}]

myArray.sort(function(a, b) {
  return priorities[b.priority] - priorities[a.priority];
});

console.log(myArray);

Upvotes: 5

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