替换 Javascript 对象中的属性值

Question

I have an array in this format:

var arr = [{id: 1, age: 25, money: 2500},{id: 10, age: 10, money: 100},{id: 115, age: 80, money: 1350}]

What I want is to replace every id value with null. My first idea would have been to build a regex im combination with a for loop. But is there maybe a more efficient way to do this?

Answer 1

See map method.

 const source = [{id: 1, age: 25, money: 2500},{id: 10, age: 10, money: 100},{id: 115, age: 80, money: 1350}]; const destination = source.map((el) => ({ ...el, id: null })); // For demo purpose console.log(destination);

Answer 2

 var arr = [{id: 1, age: 25, money: 2500},{id: 10, age: 10, money: 100},{id: 115, age: 80, money: 1350}] arr.forEach(item => { Object.keys(item).forEach(function(key) { if(key ==='id') { item[key] = null; } }); }) console.log(arr)

Answer 3

Read through documentation :

The RegExp object is used for matching text with a pattern.

Here, working with regex would be really unefficient since you work with objects

---

There are multiple ways of doing what you want :

You can use a for i loop to loop through your items

 const arr = [{id: 1, age: 25, money: 2500},{id: 10, age: 10, money: 100},{id: 115, age: 80, money: 1350}] for (let i=0; i<arr.length;i++){ arr[i].id = null } console.log(arr)

Or with the Array#forEach method on arrays :

 const arr = [{id: 1, age: 25, money: 2500},{id: 10, age: 10, money: 100},{id: 115, age: 80, money: 1350}] arr.forEach(item => { item.id = null }) console.log(arr)

---

You could also have used Array#Map

 const arr = [{id: 1, age: 25, money: 2500},{id: 10, age: 10, money: 100},{id: 115, age: 80, money: 1350}] const arrWithoutIds = arr.map(item => { item.id = null return item }) console.log(arrWithoutIds)