Filter and delete filtered elements in an array

Question

I want to remove specific elements in the original array (which is var a). I filter() that array and splice() returned new array. but

Answer 1

another way is filtering in two list like below:

const originalList = [{condition:true}, {condition: false}, {condition: true}];

// wished lists
const listWithTrue = originalList.filter(x=>x.condition);
const listWithFalse = originalList.filter(x=>!x.condition); // inverse condition