JavaScript

Promises

const gatherRocketParts = () =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log("Gathered rocket parts");
      resolve();
    }, 1000);
  });

const assembleRocket = () =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log("Assembled rocket");
      resolve();
    }, 1500);
  });

const fuelRocket = rocket =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log("Fueled rocket");
      resolve();
    }, 2000);
  });

const performPreLaunchChecks = () =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log("Performed pre-launch checks");
      resolve();
    }, 1000);
  });

const launchRocket = () =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      const launchSuccess = true;
      if (launchSuccess) {
        resolve("Rocket launched!");
      } else {
        reject("Rocket launch failed.");
      }
    }, 2000);
  });

const initiateRocketLaunch = async () => {
  await gatherRocketParts();
  await assembleRocket();
  await fuelRocket();
  await performPreLaunchChecks();
  const launchStatus = await launchRocket();
  console.log(launchStatus);

};

initiateRocketLaunch();

const gatherRocketParts = () =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log("Gathered rocket parts");
      resolve();
    }, 1000);
  });

const assembleRocket = () =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log("Assembled rocket");
      resolve();
    }, 1500);
  });

const fuelRocket = () =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log("Fueled rocket");
      resolve();
    }, 2000);
  });

const performPreLaunchChecks = () =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      console.log("Performed pre-launch checks");
      resolve();
    }, 1000);
  });

const launchRocket = () =>
  new Promise((resolve, reject) => {
    setTimeout(() => {
      const launchSuccess = true;
      if (launchSuccess) {
        console.log("Launched rocket!");
        resolve("Rocket launched!");
      } else {
        reject("Rocket launch failed.");
      }
    }, 2000);
  });

const initiateRocketLaunch = async () => {
  await gatherRocketParts();
  await assembleRocket();
  await fuelRocket();
  await performPreLaunchChecks();
  const launchStatus = await launchRocket();
  console.log(launchStatus);
};

initiateRocketLaunch();
console.log("This happens right after 'launchRocket' call.");