Tag: node.js

Kill Node.JS service by port / Arrêter un service Node.JS avec son port

29/03/2022 Nicolas Baptista AWS, Fedora/CentOS/RedHat, Google Cloud, Javascript, Node.JS, Server Maintenance 0 Comments

🇬🇧Dear all, is it possible you want to kill a Node.JS service with your linux machine, that is running on a specific port

Il est possible que vous voulez arrêter un processus Node.JS sur un port précis sur votre machine linux🇫🇷

Here is the magic command to find and kill the Node.JS process

Voici la commande magique qui permet de trouver et arrêter de processus avec son port

netstat -pluton
It looks like the name of the famous planet / Moyen mémo-technique on pense à cette p’tite planete

Then you should be able to find the process (PID) with the port associated

Vous devriez avec cette commande trouver le nom du processus (PID) avec le port associé

PORT 4000:

Sort your result by distance – Node.JS

01/08/2021 Nicolas Baptista Javascript, JSON, Node.JS, REST API 0 Comments

Supposed that you return in your Node.JS backend a list of items, and you want to sort the results by distance.

For exemple, you do a GET /usersLocation and you have it:

[
   {
      name: "Paul",
      gender: "man",
      distance: 4.1
   },
   {
      name: "Philip",
      gender: "man",
      distance: 4.9
   },
   {
      name: "Elina",
      gender: "woman",
      distance: 2.5
   }
]

In your app you have the result to be listed by distance for exemple, so the user can know who is nearest first, and don’t have to scroll down to see that Elina is nearest. To do so, we can add this portion of code before returning the list of items:

    // items : variable containing all the items

    // SORT
    for(let a=items.length;a>0;a--)
    {
       for(let b=0;b<a-1;b++)
       {
          if(items[b].distance>items[b+1].distance) // we order by distance
          {
             // we swap the items
             tmp = items[b];
             items[b]=items[b+1];
             items[b+1]=tmp;
          }
       }
    }

    // returning the response for AWS Lambda
    const response = {
        statusCode: 200,
        body: JSON.stringify(items),
    };
    return response;
};

New response:

[
   {
      name: "Elina",
      gender: "woman",
      distance: 2.5
   },
   {
      name: "Paul",
      gender: "man",
      distance: 4.1
   },
   {
      name: "Philip",
      gender: "man",
      distance: 4.9
   }
]

Nicolas BAPTISTA