javascriptlodashequivalentexternal-dependenciesmaxby

Equivalent of Lodash’s .maxBy in JavaScript


What is the JavaScript equivalent of Lodash’s .maxBy? I saw the code _.maxBy(values, ...) in a YouTube tutorial on minimax. I didn’t want to use any external dependencies, but when I googled my question, I couldn’t find anything that answered my question.
I do have a guess though - forEach except it also finds the maximum value


Solution

  • You can see the implementation here, it's open source:

    function maxBy(array, iteratee) {
        let result;
        if (array == null) {
            return result;
        }
        let computed;
        for (const value of array) {
            const current = iteratee(value);
    
            if (
                current != null &&
                (computed === undefined
                    ? current === current && !isSymbol(current)
                    : current > computed)
            ) {
                computed = current;
                result = value;
            }
        }
        return result;
    }