To get items from array that match array of values I use this:
var result =_(response).keyBy('id').at(arrayOfIDs).value();
How can I do the opposite? Get items that does not match array of values.
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3 Answers
This is easily done with vanilla JS.
var nonMatchingItems = response.filter(function (item) {
return arrayOfIDs.indexOf(item.id) === -1;
});
The same approach is possible with lodash's _.filter(), if you positively must use lodash.
ES6 version of the above:
var nonMatchingItems = response.filter(item => arrayOfIDs.indexOf(item.id) === -1);
// or, shorter
var nonMatchingItems = response.filter(item => !arrayOfIDs.includes(item.id));
Comments
You don't need lodash, just use plain javascript; it's easier to read as well...
function getId (val) {
return val.id;
}
function notMatchId (val) {
return arrayOfIDs.indexOf(val) === -1;
}
var result = response.map(getId).filter(notMatchId);
1 Comment
Tomalak
Not really correct, this returns a list of IDs, the OP wants the associated items.
I think you're looking for the pullAll (https://lodash.com/docs/4.17.15#pullAll) function :
const result = _.pullAll([...response], arrayOfIDs);