CODEWITHSUNDEEP
javascript
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Reputation: 6158

trying to filter an array

I have this code:

console.log(this.productlist[this.productlist.length-1] === product); //says: true
this.productlist == this.productlist.filter(p => p !== product);
console.log(this.productlist);  //the product is still in the list

I want to filter the product(which is the last item in the list) out of this.productlist. The first console.log says true, so both objects are the same. But the second console.log shows that the product is still in the list.

I use the filter on other places and there it works. I am clueless. What can I do to find out why this is not working here?

Upvotes: 0

Views: 64

Answers (3)

Sachin Gupta
Sachin Gupta

Reputation: 5311

In line 2, you are using a == equality operator, not the assignment =.

Upvotes: 1

Niall Moore
Niall Moore

Reputation: 138

If you are specifically after the last element you can use pop.

let a = [1,2,3,4]
let b = a.pop()
console.log(a)
console.log(b)

Upvotes: 0

Sachin Gupta
Sachin Gupta

Reputation: 5311

Various methods to remove last item from array:

Use filter:

array = array.filter((elem,index) => index != array.length-1)

using splice:

array.splice(array.length-1)

using slice:

array.slice(0,array.length-1)

Upvotes: 1

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