Remove an item from array using UnderscoreJS

Question

Say I have this code

var arr = [{id:1,name:\'a\'},{id:2,name:\'b\'},{id:3,name:\'c\'}];

and I want to remove the item with id = 3 from the array. Is th

Answer 1

Use can use plain JavaScript's Array#filter method like this:

var arr = [{id:1,name:'a'},{id:2,name:'b'},{id:3,name:'c'}];

var filteredArr = arr.filter(obj => obj.id != 3);

console.log(filteredArr);

Or, use Array#reduce and Array#concat methods like this:

var arr = [{id:1,name:'a'},{id:2,name:'b'},{id:3,name:'c'}];

var reducedArr = arr.reduce((accumulator, currObj) => {
  return (currObj.id != 3) ? accumulator.concat(currObj) : accumulator;
}, []);

console.log(reducedArr);

NOTE:

• Both of these are pure functional approach (i.e. they don't modify the existing array).
• No, external library is required in these approach (Vanilla JavaScript is enough).