This is my array
const arr = [
{ id: "1", hello: "hello1" },
{ id: "2", hello: "hello2" },
];
I want this code
const finalarr = [
{ id: "1", hello: "hello1", bye: 'bye1' },
{ id: "2", hello: "hello2", bye: 'bye2' },
];
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What have you tried, and what exactly is the problem with it? Do you know how to add a prop to an object? How to loop over an array?jonrsharpe– jonrsharpe2020-05-09 14:37:45 +00:00Commented May 9, 2020 at 14:37
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thanks jonrsharpe I created this for object but I don't understand how to create for an array var addToObject = function (obj, key, value, index) { var temp = {}; var i = 0; for (var prop in obj) { if (obj.hasOwnProperty(prop)) { // If the indexes match, add the new item if (i === index && key && value) { temp[key] = value; } // Add the current item in the loop to the temp obj temp[prop] = obj[prop]; // Increase the count i++; } } if (!index && key) { temp[key] = value; } return temp; };Hamidur Rahman– Hamidur Rahman2020-05-09 14:49:49 +00:00Commented May 9, 2020 at 14:49
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Then edit to give a minimal reproducible example.jonrsharpe– jonrsharpe2020-05-09 14:51:03 +00:00Commented May 9, 2020 at 14:51
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2 Answers
Try with map:
var arr = [{ id: "1", hello: "hello1" },{ id: "2", hello: "hello2" }];
result = arr.map(elem=>({...elem, 'bye':`bye${elem.id}`})); // with attaching the id
result2 = arr.map((elem,i)=>({...elem, 'bye':`bye${i+1}`})); // by generating id;
console.log(result);
console.log(result2);
Comments
By using the below loop in your code you can get ur required output.
for (var i =0;i<arr.length;i++){
arr[i]["bye"] = "bye"+(i+1);
}
