How to split a dictionary in javascript?

April 12, 2022

I was wondering if there is a simple way, a built-in function to split a dictionary in javascript.

For example:

my dictionary is:

let data = {    "Is your salary above 1000$?":["yes","no",false,0],
              "Is your salary above 2000?":["yes","no",false,1],
              "Is your salary above 3000?":["yes","no",false,2],
              "Is your salary above 4000?":["yes","no",false,3],
              "Is your salary above 5000?":["yes","no",false,4]}

I want it to be:

 data1 = {    "Is your salary above 1000$?":["yes","no",false,0],
              "Is your salary above 2000?":["yes","no",false,1]}

 data2 = {     "Is your salary above 3000?":["yes","no",false,2],
              "Is your salary above 4000?":["yes","no",false,3],
              "Is your salary above 5000?":["yes","no",false,4]}

I can do it through looping but i was wondering if there is a faster way or a built in fuction, i did search but i didn’t find anything that does that.

>Solution :

Use Object.entries() to convert your object into an array of key-value pairs
slice it using Array.prototype.slice()
Convert back every Array of key-value pairs back into an Object use Object.fromEntries()

const data = {
  "Is your salary above 1000$?": ["yes", "no", false, 0],
  "Is your salary above 2000$?": ["yes", "no", false, 1],
  "Is your salary above 3000$?": ["yes", "no", false, 2],
  "Is your salary above 4000$?": ["yes", "no", false, 3],
  "Is your salary above 5000$?": ["yes", "no", false, 4],
};

const sliceAt = 2;
const dataArr = Object.entries(data);
const obA = Object.fromEntries(dataArr.slice(0, sliceAt));
const obB = Object.fromEntries(dataArr.slice(sliceAt));

console.log(obA);
console.log(obB);