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Array filterUntil function implementation for javascript

This is not natively available in javascscript, so I just made a tiny utility function. It returns an array of 1 item so you can use it consistently with frameworks like Rx etc which prefer to work with Arrays. This effectively also gives you an idea of how to break from a loop, especially an alternative to using a forEach.

function filterUntil(arr, condition) {
    for (var item of arr) {
        if (condition(item)) {
            return [item];
        }
    }

    return [];
}

Why is this useful?

The advantage of using this over the primitive filter is that if you only care about the first matched value, you save computation time by not iterating through the entire array.

Example usage

filterUntil([1,2,3,4], function(item) { console.log('here'); return item === 3})

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Also Read:

1. es6 iterators and iterables - creating custom iterators
2. Pure vs Impure functions
3. Using es6 modules with simple examples
4. gzip compress and cache api response in express
5. Passing arguments from one function to another in javascript

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