ready-steady-go.js

function ready(payload) {
    const fns = []

    let lastReturnValue = payload;

    function steady(fn) {
        fns.push(fn)
        return {
            steady, go
        }
    }

    function go() {
        fns.forEach(fn =>(lastReturnValue = fn(lastReturnValue)))
        return lastReturnValue
    }

    return {
        steady
    }
}

console.log(
    ready('Hello, I am ready steady go')
        .steady(text => Array.from(text))
        .steady(arr => arr.reverse())
        .steady(arr => arr.map(c => c.toUpperCase()))
        .steady(arr => arr.join(' '))
        .go()
)