how to write algorithms in javascript code example

Example: javascript algorithms

export let ArrayView = (
    array,
    start = 0,
    end = array.length,
) => ({
    length: end - start,
    toArray: () => array.slice(start, end),
    slice: () => ,
    get: () => ,
});

let binarySearchWithArrayView = (array, ...args) =>
    binarySearchWithArraySplitting(ArrayView(array), ...args)