ready-steady-go.js

function ready(payload) {


    let lastReturnValue = payload;

    function steady(fn) {
        lastReturnValue = fn(lastReturnValue)
        return {
            steady,
            get value() {
               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(' '))
        .value
)