Delete object from ImmutableJS List based upon property value

Question

What would be the simplest way to delete an object from a List based on a value of a property?

I'm looking for an equivalent of the $pull in MongoDB.

My List looks simple like this:

[{a: '1' , b: '1'},{a: '2' , b: '2'}]

And I'd like to remove from the array the object with property a set to '1'. In MongoDB, I'd do it like this:

Model.update({_id: getCorrectParentObj},{ $pull: {listIDeleteFrom: { a: '1' } } },(err, result)=>{});

How can I get the same result with ImmutableJS?

Answer 1

You could simply filter the immutable list:

var test = Immutable.List.of(Immutable.Map({a: '1'}), Immutable.Map({a: '2'}));
test = test.filter(function(item) { return item.get('a') !== '1' });

However, filter on non-empty List would result a different immutable list, thus you may want to check the occurrence of {a: 1} first:

if (test.some(function(item) { return item.get('a') === '1'; })) {
    test = test.filter(function(item) { return item.get('a') !== '1' });
}