I have the following array:
var arr = [{"userId":"12j219","name":"Harry"},{"userId":"232j32", "name":"Nancy"}]
I want to delete a whole object when the following condition is met:
userId == 12j219
For that, I've done the following:
arr.filter((user)=>{
if(user.userId != "12j219"){
return user;
}
})
It does the job, but for sure it does not delete anything. How can I delete the object from the array?
filter() returns a new array. From the docs:
Return value: A new array with the elements that pass the test.
You need assign the resultant array to arr variable.
Try:
var arr = [{"userId":"12j219","name":"Harry"},{"userId":"232j32", "name":"Nancy"}]
arr = arr.filter((user) => {
return user.userId !== '12j219'
})
If you have multiple references to the same array in different places of the code, you can just assign it to itself.
arr = arr.filter(user => user.userId !== "12j219");
Basically array filter iterates on all the elements from array, expects a true or false return. If false that element is removed and if true it stays.
var newArr = arr.filter(function(el){
return el.userId != "12j219";
});
filterreturns a new array.filteredArray = arr.filter(user => user.userId !== '12j219').