Best way to mutate immutables?

ImmutableJS sucked becauase of its overly verbose way to access data. But it had nice mutators.

If I’m using it properly, seamless-immutable relies on what methods return a new value, so we’re missing a lot of how to mutate data. Is there a cleaner way to push a new element onto an array? Currently I’m doing something like this:

    let updatedArray = this.state.arr.asMutable();
    updatedArray.push(newElement);
    this.setState({arr: new Immutable(updatedArray)});

[tad-lispy]

That’s true, that delete would be useful, however the name doesn’t seem safe - it can easily collide with reserved keyword. I would actually call it without.

In one of my projects I came up with this helper function:

remove_item = function(index, array) {
    return array.slice(0, index).concat(array.slice(index + 1));
};

Then you can remove 3rd item by calling:

arr = remove_item(2, arr)

I can make a PR to use it as a method of immutable array. What do you think, @rtfeldman ?

As for the push - is there anything wrong with concat?

[slashwhatever]

Did this ever get implemented or discussed?