Keep Object as Object after filtering

Question

That is my datastructure

const data = Immutable.fromJS({
        1: {
            foo: 'bar'
            ...
        },
        2: {
            foo: 'foo'
            ...
        },
        3: {
            foo: 'foobar'
            ...
        },
    },
});

I want to filter the data and I need my filteredData to be of exactly the same type - Immutable Object. When I run

const filtered = data.get('data').valueSeq().filter(obj => {
    ...
    return obj;
});

I get this [{}, {}, {}, ...].

I need it to be like this (as the input data) {1: {...}, 2: {...}, 3: {...}}. What is the correct filter function for this so that the return type is already a Map and not an Array. Or is there nothing like this.

Answer 1

After filtering your object is still an ImmutableObject (see example)

const data = Immutable.fromJS({
    data: {
        1: {
            foo: 'bar'
        },
        2: {
            foo: 'foo'
        },
        3: {
            foo: 'foobar'
        },
    },
    kittens: {}
});

const res = data.get('data').filter(obj=>obj.get('foo') === 'bar');
console.log(res);

//still immutable object
console.log(res.get('1'));

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