Sort an array of objects using Boolean property in JavaScript
Given the JavaScript array containing Boolean values. The task is to sort the array on the basis of Boolean value with the help of JavaScript. There are two approaches that are discussed below:
Table of Content
- Using Array.sort() Method and === Operator
- Using Array.sort() and reverse() Methods
- Using a Custom Comparator Function for Objects
Using Array.sort() Method and === Operator
- Use JavaScript Array.sort() method.
- In the Comparison condition, Use === operator to compare the Boolean objects.
- Return 0, 1, and -1 means equal, greater, and smaller respectively depending upon the comparison.
Example: This example implements the above approach.
let arr = [false, true, false, true, false];
function GFG_Fun() {
arr.sort(function (x, y) {
return (x === y) ? 0 : x ? -1 : 1;
});
console.log("Sorted Array - [" + arr + "]");
}
GFG_Fun();
Output
Sorted Array - [true,true,false,false,false]
Using Array.sort() and reverse() Methods
- Use JavaScript Array.sort() method.
- In Comparison condition, Subtract the first element from the second one to compare the objects and return that value.
- Use .reverse() method, If the result is needed to be reversed.
Example: This example implements the above approach.
let arr = [false, true, false, true, false];
function GFG_Fun() {
arr.sort((a, b) => b - a).reverse();
console.log("Sorted Array - [" + arr + "]");
}
GFG_Fun();
Output
Sorted Array - [false,false,false,true,true]
Using a Custom Comparator Function for Objects
When dealing with objects that have a Boolean property, a custom comparator function can be used to sort the array based on the Boolean property.
Example: This example demonstrates sorting an array of objects based on a Boolean property.
let arr = [
{ name: "Alice", active: false },
{ name: "Bob", active: true },
{ name: "Charlie", active: false },
{ name: "David", active: true },
{ name: "Eve", active: false }
];
function sortObjectsByBoolean(arr) {
arr.sort((a, b) => b.active - a.active);
}
sortObjectsByBoolean(arr);
console.log(arr);
Output
[
{ name: 'Bob', active: true },
{ name: 'David', active: true },
{ name: 'Alice', active: false },
{ name: 'Charlie', active: false },
{ name: 'Eve', active: false }
]