Example 1: how to filter an array of objects in javascript
let arr=[{id:1,title:'A', status:true}, {id:3,title:'B',status:true}, {id:2, title:'xys', status:true}];
//find where title=B
let x = arr.filter((a)=>{if(a.title=='B'){return a}});
console.log(x)//[{id:3,title:'B',status:true}]
Example 2: filter array object by its elements
const things = {
thing: [
{ place: 'here', name: 'stuff' },
{ place: 'there', name: 'morestuff1' },
{ place: 'there', name: 'morestuff2' },
],
};
const removeDuplicates = (array, key) => {
return array.reduce((arr, item) => {
const removed = arr.filter(i => i[key] !== item[key]);
return [...removed, item];
}, []);
};
console.log(removeDuplicates(things.thing, 'place'));
// > [{ place: 'here', name: 'stuff' }, { place: 'there', name: 'morestuff2' }]
Example 3: javascript filter array of objects
let people = [
{ name: "Steve", age: 27, country: "America" },
{ name: "Jacob", age: 24, country: "America" }
];
let filteredPeople = people.filter(function (currentElement) {
// the current value is an object, so you can check on its properties
return currentElement.country === "America" && currentElement.age < 25;
});
console.log(filteredPeople);
// [{ name: "Jacob", age: 24, country: "America" }]
Example 4: javascript filter array of objects
function isBigEnough(value) {
return value >= 10
}
let filtered = [12, 5, 8, 130, 44].filter(isBigEnough)
// filtered is [12, 130, 44]