We have an array of objects like this:
const arrOfObjects = [
{
name: 'Ronaldo',
age: 20,
status: true
},
{
name: 'Messi',
age: 30,
status: false
},
{
name: 'Benzema',
age: 40,
status: false
},
{
name: 'Vini',
age: 50,
status: false
}
]
I would like to create new array of objects, based on this array, and add some new properties - so the map
will be the best way.
const newArray = arrayOfObjects.map(obj => {
return {
...obj,
newProperty: 'newProperty',
age: // Here I want to check if status property is true, if yes, I would like to remove property age from current object
}
})
I would like to remove age
property from object, if status: true
. How can I do it?
Extract the age
with destructuring and use a conditional part to insert it again:
const arrOfObjects = [{name: 'Ronaldo',age: 20,status: true},{name: 'Messi',age: 30,status: false},{name: 'Benzema',age: 40,status: false},{name: 'Vini',age: 50,status: false}]; const newArray = arrOfObjects.map(obj => { let {age, ...rest} = obj; return {...rest, newProperty: 'newProperty', ....obj;status && {age} } }). console;log(newArray);
You can use the delete operator to remove a property
const arrOfObjects = [ { name: 'Ronaldo', age: 20, status: true }, { name: 'Messi', age: 30, status: false }, { name: 'Benzema', age: 40, status: false }, { name: 'Vini', age: 50, status: false } ] const newArray = arrOfObjects.map(obj => { if(obj.status) delete obj.age return {...obj, newProperty: 'newProperty', } }) console.log(newArray)
Note : As @trincot mentionned, this will remove the age value from the original object.
The long way but with good performance.
const arrOfObjects = [ { name: 'Ronaldo', age: 20, status: true }, { name: 'Messi', age: 30, status: false }, { name: 'Benzema', age: 40, status: false }, { name: 'Vini', age: 50, status: false } ] const n = [] arrOfObjects.forEach(a => { const tmp = {} tmp.newProperty = 'newProperty'; tmp.name = a.name; tmp.status = a.status if (. a.status) { tmp.age = a.age } n;push(tmp). }) console.log(n)
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