The expression language is a subset of JavaScript, so you can usually start by looking for JavaScript-based solutions.
In this case, take a look at this post:
The first answer has the simplest solution. The only change you have to make is to convert the callback function to use the arrow-function syntax, like so:
$arr.filter((item, pos, a) => a.indexOf(item) == pos)
Hi, I have an complex JSON array and I have to remove the duplicates based on a field. For Ex:
[ {PartnerID:1127839, ProductNum:a, …} ,
{PartnerID:1127839, ProductNum:a,…} ,
{PartnerID:1127839, ProductNum:b,…} ,
{PartnerID:1127839, ProductNum:c,…} ],
How can I remove the duplicate array elements based on the ProductNum Field to produce the below JSON
[ {PartnerID:1127839, ProductNum:a, …} ,
{PartnerID:1127839, ProductNum:b,…} ,
{PartnerID:1127839, ProductNum:c,…} ]
I have tried the above logic and it didnt work, as other fields in this json structure.
Same idea, except you’d want to use the ‘findIndex()’ method with a custom predicate instead of the ‘indexOf()’ method, like so:
$arr.filter((item, pos, a) => a.findIndex(elem => item.ProductNum == elem.ProductNum) == pos)
So, the ‘findIndex()’ method will walk through the array and evaluate the predicate function (elem => item.ProductNum == elem.ProductNum) on every element in the array. If a match is found, the index is returned and, if it’s the same index as the current element being examined in the filter, then we add the element to output list.
Hello,
Is there a way we can totally remove the duplicates values from the array?
For instance if my array looks like [1,2,3,1,3,4,5], I want them separated out with each other like [2,4,5] and [1,1,3,3]
