small.js

function expand(stream, iterator) {
    return flatten(map(stream, iterator))
}

function forEach(stream, iterator) {
    return stream.pipe(to(iterator))
}

function prop(name) {
    return function (item) { return item[name] }
}

function method(name) {
    return function (item) { return item[name]() }
}

function isTruthy(v) {
    return !!v
}