<pre class="shiki github-dark shaku"><code>// interface Laziness {// sleep: (time: number) =&gt; Laziness// sleepFirst: (time: number) =&gt; Laziness// eat: (food: string) =&gt; Laziness// }/*** @param {string} name* @param {(log: string) =&gt; void} logFn* @returns {Laziness}*/function LazyMan(name, logFn) {let queue = [];queue.push((next) =&gt; {logFn(`Hi, I'm ${name}.`);next();});const execute = () =&gt; {if(queue.length == 0)return;const task = queue.shift();task(() =&gt; {execute();})}const obj = {eat: (food) =&gt; {queue.push((next) =&gt;{logFn(`Eat ${food}.`);next();});return obj;},sleep: (wait) =&gt; {queue.push((next) =&gt; setTimeout(() =&gt; {logFn(`Wake up after ${wait} ${wait == 1 ? 'second' : 'seconds'}.`)next();}, wait * 1000))return obj;},sleepFirst: (wait) =&gt; {queue.unshift((next) =&gt; setTimeout(() =&gt; {logFn(`Wake up after ${wait} ${wait == 1 ? 'second' : 'seconds'}.`)next();}, wait * 1000))return obj;}}setTimeout(execute, 0);return obj;}</code></pre>

my solution

LazyMan is very lazy, he only eats and sleeps. LazyMan(name: string, logFn: (log: string) => void) would output a message, the passed logFn is used. L…