CODEWITHSUNDEEP
node.jsloops
Pika
Pika

Reputation: 35

Don't loop again until completed

In my app, is there a way that I can make a while loop not go through unless everything inside it has been ran through once? This is what I'm doing:

while (runs > 0) {
  message.channel.send("run")
  await collector.on('collect', async msg => {
        if (msg.content.startsWith("success")) {
          succeeds += 1
        }
        runs -= 1
      }

If I have runs set to 10, each time the if statement got triggered it adds to succeeds variable. At the end when its done, console.log(succeeds) shows 18-22 instead.

The point of this while loop is to have it execute something x times.

Upvotes: 0

Views: 54

Answers (2)

AnandShiva
AnandShiva

Reputation: 1339

You can use async/await and promises to make your while loop wait. Use the resolve of promise to make your single iteration pause.

const waitingWhileFunction = async () => {
  let runs = 10;
  while (run > 0) {
    await new Promise((resolve, reject) => {
      collector.on('collect', (msg) => {
        if (msg.content.startsWith('success')) {
          succeeds += 1;
        }
        resolve();
      });
    });
    runs -= 1;
  }
};

waitingWhileFunction();

Upvotes: 1

Shihab
Shihab

Reputation: 2679

You can catch error inside the loop so that it doesn't break. Example:

let loop = true;
while(loop) {
  try {
    // do something 1
    // do something 2
    // do something N
    loop = false;
  } catch(e) {
    // Did not succeed. Run again
  }
}

Upvotes: 0

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