I want to loop through this object and return the keys with the highest property values into an array.
Object {clear-spring: 3, deep-autumn: 2, warm-spring: 1, light-summer: 2, light-spring: 2, clear-summer: 3}
In this case, I want an array like this:
["clear-summer", "clear-spring"]
Is there an efficient way to do this with jQuery or pure javascript?
You simply need to iterate over your item once, keeping track of what ever the largest set is that you've found so far.
var a = {'clear-spring': 3, 'deep-autumn': 2, 'warm-spring': 1, 'light-summer': 2, 'light-spring': 2, 'clear-summer': 3};
var max = {
val: Number.NEGATIVE_INFINITY,
keys: []
}
for (var prop in a) {
if (a.hasOwnProperty(prop)) {
var n = a[prop];
if (n >= max.val) {
if (n > max.val) {
max.keys = [];
}
max.val = n;
max.keys.push(prop);
}
}
}
You may use for.. in to loop through the object
var object = {clear-spring: 3, deep-autumn: 2, warm-spring: 1, light-summer: 2, light-spring: 2, clear-summer: 3};
// Iterates over the oject
for (var key in object) {
if(object.hasOwnProperty(key)) {
// Key === 'clear-spring' (sample)
// object[key] === 3 (sample)
// do whatever you want
}
}
var o = {'clear-spring': 3, 'deep-autumn': 2, 'warm-spring': 1, 'light-summer': 2, 'light-spring': 2, 'clear-summer': 3};
var max = 0, result = [];
// find max:
for(var k in o) { if (o[k] > max) max = o[k] }
// find keys matching the max:
for(var k in o) { if (o[k] === max) result.push(k) }
// log result
console.log(result);
Not sure if most efficient, but first find the max value, then go back and pull out all the ones that match max value.
var obj = {'clear-spring': 3, 'deep-autumn': 2, 'warm-spring': 1, 'light-summer': 2, 'light-spring': 2, 'clear-summer': 3};
var ary = [];
var max = Number.NEGATIVE_INFINITY;
for (var prop in obj) {
if (obj[prop] > max) {
max = obj[prop];
}
}
for (var prop in obj) {
if (obj[prop] === max) {
ary.push(prop);
}
}
