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exporting logic as a function in express.js


exporting logic as a function in express.js

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exporting logic as a function in express.js
Tag : javascript , By : Hitesh Prajapati
Date : November 24 2020, 09:00 AM

hop of those help? There is a problem exporting basic logic from a API controller in express.js. Below is the code before (working) and then with the logic exported into an external function (not working). , Just pass the results to the function ?
function unpack(results) {
  return {
    'etsy': JSON.parse(results[0]),
    'ebay': JSON.parse(results[1])
  };
}; 

// ...

function(err, results){
  if (!err) { return res.json( unpack(results) )};
    return err
})

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How does exporting the express instance work


Tag : asp.net-mvc , By : Cowtung
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I've came across code that goes like this
app = module.exports = express()
app = express()
app.get('/blah', function(a,b){});
app.post('/blah', function(a,b){});
module.exports = app
function createServer() {
    //the magic happens in the next line:
    function app(req, res, next){ app.handle(req, res, next); } 
    utils.merge(app, proto);
    utils.merge(app, EventEmitter.prototype);
    app.route = '/';
    app.stack = [];
    for (var i = 0; i < arguments.length; ++i) {
        app.use(arguments[i]);
    }
    return app;
};

Separating logic from Express router and still access Express functions


Tag : javascript , By : Simone
Date : March 29 2020, 07:55 AM
To fix this issue req and res are just ordinary objects passed as arguments to the controller function. You don't have to require anything special in Parent.controller.js. Just make sure the parameters for createChild are req, res. And next if you needed. Like so:
module.exports.createChild = (req, res, next) => {
   res.status(200).json({ message: 'OK' });
}
const express = require('express');
const Parent = require('Parent.controller');

const router = express.Router();

Router.post('/create-child', Parent.createChild);

Exporting and importing Express modules


Tag : development , By : Milander
Date : March 29 2020, 07:55 AM
it helps some times You can export the friends array from your friends.js module like this:
// array of objects
const friends = [
    {   
        routeName: "ahmed",
        name:"Ahmed",
        photourl:"https://media.licdn.com/mpr/mpr/shrinknp_400_400/p/6/005/064/1bd/3435aa3.jpg",
        questions:[
                    5,
                    1,
                    4,
                    4,
                    5,
                    1,
                    2,
                    5,
                    4,
                    1
        ]
    }   
];

module.exports = function(app){

    //retreiving stored objects with person's data
    app.post("/survey", function(req, res){
        var incomingPerson = req.body;
        incomingPerson.routeName = incomingPerson.name.replace(/\s+/g, "").toLowerCase();
        console.log(incomingPerson);
        // friends.push(person);
    });
    return friends;

};

module.exports.friends = friends;
const friends = require('./friends.js').friends;

Exporting Ladder Logic in Tia 14


Tag : development , By : Sebastian Gift
Date : March 29 2020, 07:55 AM
this will help Your third option you listed may be the best way to do this. You can use the Openness API that is a .net dll. You can quite easily export a plc block (in xml) then import the function block into another project. you don't even have to look at the xml to do this.
Here is an example code of how to do so
//Import blocks
private static void ImportBlocks(PlcSoftware plcSoftware)
{
   PlcBlockGroup blockGroup = plcSoftware.BlockGroup;
   IList<PlcBlock> blocks = blockGroup.Blocks.Import(new 
        FileInfo(@"D:\Blocks\myBlock.xml"), ImportOptions.Override);
}


private static void ExportBlock(PlcSoftware plcSoftware)
{
  PlcBlock plcBlock = plcSoftware.BlockGroup.Blocks.Find("MyBlock");
  plcBlock.Export(new FileInfo(string.Format(@”D:\Samples\{0}.xml”, 
  plcBlock.Name)),
  ExportOptions.WithDefaults);
}

Exporting and importing in Node express


Tag : javascript , By : Der Ketzer
Date : March 29 2020, 07:55 AM
this one helps. In your .js file, you can export whatever functions you would like to use in other parts of your code base. The below is an example of what should go at the bottom of your .js file. It will export the 3 functions you defined.
module.exports = {
    findByEmail, 
    updateUser, 
    deleteUser
}
const commonMethods = require('./commonMethods.js')
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