// Is not being mantained anymore var pipe = function() { return Array.prototype.slice.call(arguments).reduce(function(v, f, i) { if (i === 1 && v && v.constructor === Function) { let exec = v(); if (exec && exec.then) { return exec.then(v => f(v)); } else { return f(exec); } } else if (v && v.then) { return v.then(v => f(v)); } else { return f(v); } }); };