logo
down
shadow

Set operation with condition


Set operation with condition

By : liron
Date : November 17 2020, 01:00 AM
Hope that helps Unfortunately, MongoDB queries are not flexible enough to trigger an post query event. You could do it in two ways, but both involve firing more than a single query:
The first approach, involves:
code :
db.items.update({
    "unpaid": {
        $gte: 500
    }
}, {
    $inc: {
        "unpaid": -500
    }
});

db.items.update({
    "unpaid":0,"paid":false
}, {
    $set: {
        "paid": true
    }
});
var bulk = db.items.initializeUnorderedBulkOp();
db.items.find({"unpaid":{$gte:500}}).forEach(function(doc){
 var unpaid = doc.unpaid-500;
 var update = {$set:{"unpaid":unpaid}};
 if(unpaid <= 0){
  update.$set["paid"] = true;
 }
  bulk.find({"_id":doc._id }).update(update);
})
bulk.execute();


Share : facebook icon twitter icon
How to block an operation until a condition is met?

How to block an operation until a condition is met?


By : Zaber
Date : March 29 2020, 07:55 AM
hope this fix your issue Assuming you are using .NET 4, I'd suggest switching RecievedMessageBuffer to be a BlockingCollection. When you are putting messages into it, call it's Add method. When you want to retrieve a message, call it's Take or TryTake methods. Take will block the reading thread until a message is available, without burning CPU like your original example.
code :
// Somewhere else
BlockingCollection<SomethingLikeAMessage> RecievedMessageBuffer = new BlockingCollection<SomethingLikeAMessage>();


// Something like this where your example was
while (this.IsListening)
{
    SomethingLikeAMessage message;
    if (RecievedMessageBuffer.TryTake(out message, 5000);
    {
        message.Reconstruct();
        message.HandleMessage(messageHandler);
    }
}
How to do the same operation until it reaches one condition

How to do the same operation until it reaches one condition


By : Christian
Date : March 29 2020, 07:55 AM
With these it helps You need to use while loop:
code :
<?php
  $n = rand(5,157);
  while ($n != 63) {
    $n = rand(5,157); // n is not 63, get another number
  }

  echo 'ok';
?>
Why both condition are checked in logical AND operation in csh if first condition return false

Why both condition are checked in logical AND operation in csh if first condition return false


By : ezra
Date : March 29 2020, 07:55 AM
Does that help use $? to check if the var is defined:
if ($?HOME_EXIST) then (do whatever you want) endif
For each in list, do operation until condition is met

For each in list, do operation until condition is met


By : NLCJ
Date : March 29 2020, 07:55 AM
it fixes the issue This happens because flatMap is used for concurrent processing of observables while you need sequential. To fix that you just need to change your flatMap to concatMap to ensure sequential flow of observables in your getCorrectSafeCombination method:
code :
Maybe<Integer> getCorrectSafeCombination() {
    return getPossibleCombinations()
            .toObservable()
            .flatMapIterable(combinations -> combinations)
            //this one
            .concatMap(combination -> tryToOpenSafeWithCombination(combination).toObservable()
                    .map(isCorrect -> new CombinationCheckResult(combination, isCorrect)))
            .filter(result -> result.isCorrect)
            .map(result -> result.combination)
            .firstElement();

}
Async operation in an if condition

Async operation in an if condition


By : smpl47
Date : March 29 2020, 07:55 AM
Does that help I cannot reproduce this either – if isReady returns false, check will print "fail" in the console.
code :
async function isReady() {
  return new Promise((resolve, reject) => {
      window.setTimeout(() => resolve(false), 1000);
    });
}

async function check() {
  if (await isReady()) {
    console.log("success");
  } else {
    console.log("fail");
  }
}

check();
Related Posts Related Posts :
  • Why do we need an 'arbiter' in MongoDB replication?
  • How to create tree like compound index in mongodb
  • Call stored function in mongodb
  • Mongodb update deeply nested subdocument
  • how do non-ACID RethinkDB or MongoDB maintain secondary indexes for non-equal queries
  • How to set "arbiterOnly" to an existing node in a replicaset, from MongoDB MMS portal?
  • MongoDB: Using $geoIntersects or $geoWithin with $near in one query
  • [METEOR $addToSet]Cannot insert into object '$addToSet' is empty
  • How to increment a field in mongodb?
  • "For" loop with meteor
  • howto route with collection's param in iron router Meteor JS
  • Connect to MongoDB on Azure (from client)
  • Aggregating filter for Key
  • Powershell Mongodb Authentication
  • Consequences of using $unwind on nested arrays?
  • How to create database schema for multiuser application (No SQL)
  • MongoDB data files created in wrong directory while changing oplog size
  • mongodb , wildcard in $in
  • shadow
    Privacy Policy - Terms - Contact Us © ourworld-yourmove.org