if I have an object that looks like:
let object = {
name1 : {
number : .5,
otherVar : 'something'
},
name2 : {
number : .7,
otherVar : 'text'
},
name3 : {
number : -.1,
otherVar : 'some words'
}
};
how could I sort it by the number value and get an array:[ name3, name1, name2]?
Here is another es6 exampel:
let object = {
name1 : {
number : .5,
otherVar : 'something'
},
name2 : {
number : .7,
otherVar : 'text'
},
name3 : {
number : -.1,
otherVar : 'some words'
}
};
let k = Object.keys(object).sort(((a, b) => object[a].number > object[b].number));
console.log(k);
Here's a one liner:
Object.keys(object).map(key => object[key]).sort((a, b) => a.number - b.number)
let sorted = Object.keys(obj).map(key => obj[key]).sort((a, b) => a.number - b.number);
Explanation:
Object.keys(obj) will return an array of keys ['name1', 'name2'...].map will turn that array into an array of values.sort takes a compare function and returns the sorted array (see documentation)Recommendation: don't call your objects object :)
Make an array that contains the object properties with the names added to them:
var array = [];
for (var key in object) {
object[key].name = key;
array.push(object[key]);
}
Then sort that array by the number:
array.sort((a, b) => a.number - b.number);
Then get the names out of the array:
var sortedNames = array.map(e => e.name);
Full demo:
let object = {
name1 : {
number : .5,
otherVar : 'something'
},
name2 : {
number : .7,
otherVar : 'text'
},
name3 : {
number : -.1,
otherVar : 'some words'
}
};
var array = [];
for (var key in object) {
object[key].name = key;
array.push(object[key]);
}
array.sort((a, b) => a.number - b.number);
var sortedNames = array.map(e => e.name);
console.log(sortedNames);
var items = [];
items = JSON.parse(object);
}); //will give you an array
function compare(a,b) {
if (a.number < b.number)
return -1;
if (a.number > b.number)
return 1;
return 0;
}
items.sort(compare); //array will be sorted by number
JSON.parse(object) give you an array?It should do the dirty work, first you flat your object into an array of objects, then you create your custom compare function, finally sort, and voila!
var keys = Object.keys(object);
function compare(a,b) {
if (object[a].number < object[b].number)
return -1;
if (object[a].number > object[b].number)
return 1;
return 0;
}
var res = keys.sort(compare);
number property in the keys.