pipeline.js

function pipelineOld() {
    var args = [].slice.call(arguments);
    var fns = (Array.isArray(args[0])) ? args[0] : args;
    
    return function() {
        var memo = arguments[0];
        fns.forEach(function(fn) {
            memo = fn(memo);
        });

        return memo;
    };
}

/**
 * More than 20% faster than `pipeline`
 */
function pipeline(...args) {
    const fns = (Array.isArray(args[0])) ? args[0] : args;
    const composedFn = (seed) => {
        return fns.reduce((result, fn) => fn(result), seed);
    };
    
    return composedFn;
}