integer-sorting/radix-sort

import assert from 'assert';

const compose = (sigma, tau) => {
    console.debug('compose', sigma, tau);
    const N = sigma.length;
    assert(sigma.length === tau.length);
    for (let i = 0; i < N; ++i) {
        tau[i] = sigma[tau[i]];
    }
};

export default compose;