Category: javascript

So I am following a tutorial about APIs and in the very first steps i got stuck

so my code is :

const PORT = 8000;
const express = require("express");
const axios = require("axios");
const cheerio = require("cheerio");

const app = express();

app.get(
  "/",
  (
    req: Request<P, XMLHttpRequestBodyInit, ResQuery, Locals>,
    res: Response<ResBody, Locals>
  ) => {
    res.json("welcome to my api");
  }
);

app.listen(PORT, () => console.log(`server running on port ${PORT}`));

I am getting this error and i don’t really know why

the error i am getting:

req: Request<P, XMLHttpRequestBodyInit, ResQuery, Locals>,
^
SyntaxError: Unexpected token ‘:’

I have already searched for an answer and got a solution that didn’t work for me

which suggested that I should disable the builtin TypeScript and JavaScript Language Features in vs code and to download and enable flow language support extension

I tried that but still got the same error

Am I missing some extensions or certain packages ?

I have a piece of code where I am calling my server to fetch some values and update the table if that value isn’t present there. After the updation, I want the user to be notified of the row where the value was updated, by making it’s cell value bold for n seconds.

var table=document.getElementById("employee_details");

var jsonString = JSON.stringify(array);

$.ajax({
    url: '/server.php',
    type: 'POST',
    data: {"input":"calculate_charges",
           data:jsonString},
    cache: false,
    success:function(response){

        const arr3=JSON.parse(response);

        for(var i=0; i<arr3.length; i++){

            if(table.rows[i+1].cells.item(10).innerHTML!=arr3[i][2]){

                 table.rows[i+1].scrollIntoView({
                     behavior: 'smooth',
                     block: 'center'
                 });

                 table.rows[i+1].cells.item(10).innerHTML=arr3[i][2];

                 setTimeout(function(){
                       table.rows[i+1].cells.item(10).style.fontWeight = "500";
                 },7000);

                 setTimeout(function(){
                       table.rows[i+1].cells.item(10).style.fontWeight = "900";
                 },4000);
            }
        }
    }
    complete:function(){}
});

Upon executing the code, I keep getting this error in the console:

Uncaught TypeError: Cannot read properties of undefined (reading
‘cells’)

And the cell item doesn’t get bold. How do I fix this issue?

Javascript expected object result not getting when sorting on value numbers( and both key and value are also numbers)

let team_id_Point = {
  26: 15,
  32: 1,
  127: 21,
};

function sortObjectbyValue(obj = {}, asc = true) {
  const ret = {};
  Object.keys(obj)
    .sort((a, b) => obj[asc ? a : b] - obj[asc ? b : a])
    .forEach((s) => (ret[s] = obj[s]));
  return JSON.stringify(ret);
}

console.log(sortObjectbyValue(team_id_Point, false));

result from above:

{"26":15,"32":1,"127":21}

required output:

{"127":21,"26":15,"32":1}

i am building an website about warehouse management system . so, there’s a task that I have to put a number in the input field and there’s a button next to it so after the putting the number I have to click the button and the result will show in quantity items field. but I don’t know how to do it

I am building a simple client-server app using React for the frontend and Node for the backend. For my client side:

function App() {

  useEffect(() => {
    fetch("/api")
    .then(response => response.json())
    .then(json => {
      console.log(json)
    })
  }, [])

  return (
    <div className="App">
    </div>
  )
}

and my server side:

const express = require("express")
const app = express()

app.get("/api", (req, res) => {
    res.json({"users": ["Alvin", "Ben", "Charlie"]})
    console.log("GET request succeeded")
})

app.listen(5000, () => {console.log("server running on port 5000")})

And I’ve added "proxy": "http://localhost:5000", to my package.json

Now everything works, and I can see the response JSON being printed out. The only thing that I don’t understand is why is my request URL http://localhost:3000/api when I’m actually requesting from http://localhost:5000/api?

I am running a mongo query from the Order database which aims to fetch the orders of a particular user by using his email-id. This is done using an API, but I am getting the complete object with some unnecessary details.

Code

I have written the following API in nextJS name myorders

import Order from "../../models/Order";
import connectDB from "../../middleware/mongoose";
import jsonwebtoken from "jsonwebtoken";

const handler = async(req, res) => {
    const token = req.body.token;
    const data = jsonwebtoken.verify(token,process.env.JWT_SECRET);
    console.log(data)
    let mere_orders = Order.find({email: data.email})
    console.log("mereorders12 = ", mere_orders)
    res.status(200).json({mere_orders});
  }
  

export default connectDB(handler);

And console.log("mereorders12 = ", mere_orders) gives me this

mereorders12 =  Query {
  _mongooseOptions: {},
  _transforms: [],
  _hooks: Kareem { _pres: Map(0) {}, _posts: Map(0) {} },
  _executionStack: null,
  mongooseCollection: Collection {
    collection: Collection { s: [Object] },
    Promise: [Function: Promise],
    modelName: 'Order',
    _closed: false,
    opts: {
      autoIndex: true,
      autoCreate: true,
      schemaUserProvidedOptions: [Object],
      capped: false,
      Promise: [Function: Promise],
      '$wasForceClosed': undefined
    },
    name: 'orders',
    collectionName: 'orders',
    conn: NativeConnection {
      base: [Mongoose],
      collections: [Object],
      models: [Object],
      config: {},
      replica: false,
      options: null,
      otherDbs: [],
      relatedDbs: {},
      states: [Object: null prototype],
      _readyState: 1,
      _closeCalled: undefined,
      _hasOpened: true,
      plugins: [],
      id: 0,
      _queue: [],
      _listening: false,
      _connectionString: 'mongodb://localhost:27017/chesswear',
      _connectionOptions: [Object],
      client: [MongoClient],
      '$initialConnection': [Promise],
      db: [Db],
      host: 'localhost',
      port: 27017,
      name: 'chesswear'
    },
    queue: [],
    buffer: false,
    emitter: EventEmitter {
      _events: [Object: null prototype] {},
      _eventsCount: 0,
      _maxListeners: undefined,
      [Symbol(kCapture)]: false
    }
  },
  model: Model { Order },
  schema: Schema {
    obj: {
      email: [Object],
      orderId: [Object],
      paymentInfo: [Object],
      products: [Object],
      address: [Object],
      subtotal: [Object],
      status: [Object]
    },
    paths: {
      email: [SchemaString],
      orderId: [SchemaString],
      paymentInfo: [SchemaString],
      products: [Mixed],
      address: [SchemaString],
      subtotal: [SchemaNumber],
      status: [SchemaString],
      _id: [ObjectId],
      updatedAt: [SchemaDate],
      createdAt: [SchemaDate],
      __v: [SchemaNumber]
    },
    aliases: {},
    subpaths: {},
    virtuals: { id: [VirtualType] },
    singleNestedPaths: {},
    nested: {},
    inherits: {},
    callQueue: [],
    _indexes: [],
    methods: { initializeTimestamps: [Function (anonymous)] },
    methodOptions: {},
    statics: {},
    tree: {
      email: [Object],
      orderId: [Object],
      paymentInfo: [Object],
      products: [Object],
      address: [Object],
      subtotal: [Object],
      status: [Object],
      _id: [Object],
      updatedAt: [Function: Date],
      createdAt: [Object],
      __v: [Function: Number],
      id: [VirtualType]
    },
    query: {},
    childSchemas: [],
    plugins: [ [Object], [Object], [Object], [Object], [Object] ],
    '$id': 1,
    mapPaths: [],
    s: { hooks: [Kareem] },
    _userProvidedOptions: { timestamps: true },
    options: {
      timestamps: true,
      typeKey: 'type',
      id: true,
      _id: true,
      validateBeforeSave: true,
      read: null,
      shardKey: null,
      discriminatorKey: '__t',
      autoIndex: null,
      minimize: true,
      optimisticConcurrency: false,
      versionKey: '__v',
      capped: false,
      bufferCommands: true,
      strictQuery: true,
      strict: true,
      pluralization: true
    },
    '$timestamps': { createdAt: 'createdAt', updatedAt: 'updatedAt' },
    '$globalPluginsApplied': true,
    _requiredpaths: [ 'status', 'subtotal', 'address', 'products', 'orderId', 'email' ]
  },
  op: 'find',
  options: {},
  _conditions: { email: '[email protected]' },
  _fields: undefined,
  _update: undefined,
  _path: undefined,
  _distinct: undefined,
  _collection: NodeCollection {
    collection: Collection {
      collection: [Collection],
      Promise: [Function: Promise],
      modelName: 'Order',
      _closed: false,
      opts: [Object],
      name: 'orders',
      collectionName: 'orders',
      conn: [NativeConnection],
      queue: [],
      buffer: false,
      emitter: [EventEmitter]
    },
    collectionName: 'orders'
  },
  _traceFunction: undefined,
  '$useProjection': true
}

But I should return order like this

{  
 orders: [
 { 
 
 "_id":"62693ae3f7fd0b7d87c8eb9c"},
 "email":"[email protected]",
 "orderId":"1389629752594",
 "paymentInfo":"No payment info",
 "products":{...},
 "address":"adasdklfasflka",
 "subtotal":4,
 "status":"Paid",
 "createdAt":{"$date":"2022-04-27T12:45:23.352Z"},
 "updatedAt":{"$date":"2022-04-27T12:45:23.352Z"},"__v":0

}
,
 { 
 
 "_id":"62693ae3f7fd0b7d87c8eb9c"},
 "email":"[email protected]",
 "orderId":"1389629752594",
 "paymentInfo":"No payment info",
 "products":{...},
 "address":"adasdklfasflka",
 "subtotal":14,
 "status":"Paid",
 "createdAt":{"$date":"2022-04-27T12:45:23.352Z"},
 "updatedAt":{"$date":"2022-04-27T12:45:23.352Z"},"__v":0

}

]

}

Additionally this is the model schema of Order

const mongoose = require("mongoose");

const OrderSchema = new mongoose.Schema(
  {
    email: { type: String, required: true },
    orderId: { type: String, required: true },
    paymentInfo: { type: String, default: "No payment info" },
    products: { type: Object, required: true },
    address: { type: String, required: true },
    subtotal: { type: Number, required: true },
    status: { type: String, required: true, default: "Pending" },
  },
  { timestamps: true }
);

export default mongoose.models.Order || mongoose.model("Order", OrderSchema);

Please help ??

I am supposed to store queries for users in the cardsData and I need to map through the data in cardsData but if I run the code on my terminal i get this error. I am a newbie and I have searched a lot of forums that suggest that cardsData is supposed to be an array but I do not know how to go forward from there. I am just following a youTube tutorial and that was exactly what was done in the tutorial.
it worked on the youTube why can’t it work for me too?

please somebody help.

[enter image description here][1]import { useContext } from 'react'
import { TinderContext } from '../context/TinderContext'
import { SiTinder } from 'react-icons/si'
import CardHeader from './CardHeader'
import CardFooter from './CardFooter'
import TinderCardItem from './TinderCardItem'

const style = {
  wrapper: `h-[45rem] w-[27rem] flex flex-col rounded-lg overflow-hidden`,
  cardMain: `w-full flex-1 relative flex flex-col justify-center items-center bg-gray-500`,
  noMoreWrapper: `flex flex-col justify-center items-center absolute`,
  tinderLogo: `text-5xl text-red-500 mb-4`,
  noMoreText: `text-xl text-white`,
  swipesContainer: `w-full h-full overflow-hidden`,
}

const Card = () => {
  const { cardsData } = useContext(TinderContext)

  return (
    <div className={style.wrapper}>
      <CardHeader />
      <div className={style.cardMain}>
        <div className={style.noMoreWrapper}>
          <SiTinder className={style.tinderLogo} />
          <div className={style.noMoreText}>
            No More Profiles in your Location...
          </div>
        </div>
        <div className={style.swipesContainer}>
          {cardsData.map((card, index) => (
            <TinderCardItem card={card} key={index} />
          ))}
        </div>
      </div>
      <CardFooter />
    </div>
  )
}

export default Card

At first I created a guildMemberAdd event in my main.js folder:

client.on('guildMemberAdd', guildMember =>{
    let welcomeRole = ('885616406538899517');
    guildMember.roles.add(welcomeRole);
});

I want to check if the guildMember is joined my guild or others.

Notes: I want to use the if statement.

//example:
if(guildMember.guild.id == '847071265100791849'){
let welcomeRole = ('885616406538899517');
    guildMember.roles.add(welcomeRole);
} else return;

I am using discord.js v13 and node.js v16.14.2

So i have been trying to write a sudoku solver and i had to complet methods inside an extend class here’s the head of the code:

class Board extends EventEmitter {
  constructor(board) {
    super();

    this.board = board || [
      [0, 0, 0, 0, 0, 0, 0, 0, 0],
      [0, 0, 0, 0, 0, 0, 0, 0, 0],
      [0, 0, 0, 0, 0, 0, 0, 0, 0],
      [0, 0, 0, 0, 0, 0, 0, 0, 0],
      [0, 0, 0, 0, 0, 0, 0, 0, 0],
      [0, 0, 0, 0, 0, 0, 0, 0, 0],
      [0, 0, 0, 0, 0, 0, 0, 0, 0],
      [0, 0, 0, 0, 0, 0, 0, 0, 0],
      [0, 0, 0, 0, 0, 0, 0, 0, 0],
    ];
  }

  getRow(index) {
    return this.board[index];
  }

here i have to check if all the rows inside that board are valid (from 1 to 9 no repet):

allrowsValid() {
  for (let c = 0; c < 9; ++c) {
    **var row = this.getRow(c)** ***//what i need to fix***

      for ( let num = 1; num <= 9; ++num){
        if (this.board[row][c] === num) {
          return false;
      }
      }
    }
    return true;
    }

How can i solve it ?
thanks !

I have a problem with proper grouping of objects in an array.

I have an array in this format:

const places = [
  {
    id: 1,
    name: "p 1",
    icon: "icon-p",
    parent_id: null,
  },
  {
    id: 2,
    name: "p 2",
    icon: "icon-p",
    parent_id: 1,
  },
  {
    id: 3,
    name: "p 3",
    icon: "icon-p",
    parent_id: 1,
  },
  {
    id: 4,
    name: "t 1",
    icon: "icon-t",
    parent_id: null,
  },
  {
    id: 5,
    name: "t 2",
    icon: "icon-t",
    parent_id: 4,
  },
  {
    id: 6,
    name: "t 3",
    icon: "icon-t",
    parent_id: 4,
  },
  {
    id: 7,
    name: "a 1",
    icon: "icon-a",
    parent_id: null,
  },
  {
    id: 8,
    name: "b 1",
    icon: "icon-b",
    parent_id: null,
  },
  {
    id: 9,
    name: "h 1",
    icon: "icon-h",
    parent_id: null,
  },
  {
    id: 11,
    name: "h 2",
    icon: "icon-h",
    parent_id: 9,
  },
  {
    id: 12,
    name: "h 3",
    icon: "icon-h",
    parent_id: 9,
  },
  {
    id: 13,
    name: "h 4",
    icon: "icon-h",
    parent_id: 9,
  },
];


const groupReultsByIcon = places.reduce((r, { icon, ...object }) => {
  let temp = r.find((o) => o.icon === icon);
  if (!temp) r.push((temp = { icon, children: [] }));
  temp.children.push(object);
  return r;
}, []);


groupReultsByIcon.forEach(({ icon, children }) => {
  console.log('icon-name: ', icon);
  console.log('children-array: ', children);
});

The code that I have managed to prepare so far is, unfortunately, only grouping by icon.

I am trying to get such an array:

const newArrayObject = [
  {
    id: 1,
    icon: "icon-p",
    children: [
      {
        id: 1,
        name: "p 1",
        icon: "icon-p",
        parent_id: null,
      },
      {
        id: 2,
        name: "p 2",
        icon: "icon-p",
        parent_id: 1,
      },
      {
        id: 3,
        name: "p 3",
        icon: "icon-p",
        parent_id: 1,
      },
    ],
  },
  {
    id: 4,
    icon: "icon-t",
    children: [
      {
        id: 4,
        name: "t 1",
        icon: "icon-t",
        parent_id: null,
      },
      {
        id: 5,
        name: "t 2",
        icon: "icon-t",
        parent_id: 4,
      },
      {
        id: 6,
        name: "t 3",
        icon: "icon-t",
        parent_id: 4,
      },
    ],
  },
  {
    id: 7,
    icon: "icon-a",
    children: [
      {
        id: 7,
        name: "a 1",
        icon: "icon-a",
        parent_id: null,
      },
    ],
  },
  {
    id: 8,
    icon: "icon-b",
    children: [
      {
        id: 8,
        name: "b 1",
        icon: "icon-b",
        parent_id: null,
      },
    ],
  },
  {
    id: 9,
    icon: "icon-h",
    children: [
      {
        id: 9,
        name: "h 1",
        icon: "icon-h",
        parent_id: null,
      },
      {
        id: 11,
        name: "h 2",
        icon: "icon-h",
        parent_id: 9,
      },
      {
        id: 12,
        name: "h 3",
        icon: "icon-h",
        parent_id: 9,
      },
      {
        id: 13,
        name: "h 4",
        icon: "icon-h",
        parent_id: 9,
      },
    ],
  },
];

As you can see grouping should follow parent_id and id
An object that parent_id === null should have children and in it itself as well as objects with its id.

I have a form where I calculate the price based on the checkboxes checked. But I am having trouble as its not updating the final price correctly. I did some jquery coding but its not functioning properly. Please someone help me debug the code and help me fix it.

//Price Calculator
$(document).ready(function(){
  
  function Calculator(){
    let totalAmount = 0;
    if($('input[datasource=service_0]').is(':checked')){  // First Checkbox targeted using datasource attribute
      totalAmount = 395;
      return totalAmount;
    }else if($('input[datasource=service_1]').is(':checked')){   // First Checkbox targeted using datasource attribute
      totalAmount = 392;
      return totalAmount;
    }else if ($("input[datasource=service_0]:checked,input[datasource=service_1]:checked").length == 2) {
      totalAmount = 397;
      return totalAmount;
    }
  }
  //Insert Updated Amount to Budget field
  $("input[type=checkbox]").on("click", function(){
    if ($("input[datasource=service_0]:checked,input[datasource=service_1]:checked").length == 2){
      $("input[name=wpcf-book-amount]").val(Calculator());
    } else{
      $("input[name=wpcf-book-amount]").val(Calculator());
    }
  })
  
})

Form containing the fields responsible to calculate the booking amount

How do I properly count the amount of replaced strings in Javascript. my increment function is in the replacement part of replace function bellow gives me a “0”.

function newrep() {
  var fid = document.getElementById('find').value;
  var regexp = new RegExp(fid, "gi");

  var rv = document.getElementById('replace').value;
 
  var inp = document.getElementById('message').value;

 let str2=(inp.replace(regexp,rv,function(x){count+=1;return"1"}))

  document.getElementById("message").value = str2;
  document.getElementById("ChCtr").innerHTML = count;

}

<main/> Message:
<br />
<textarea id="message" name="message" rows="3" cols="20">Hello </textarea>
<span id="ChCtr"></span> //display here
<br/><br/> Find:


<br />
<input type="text" id="find" name="find" size="30"><br />

<br/><br/> Replace:


<br />
<input type="text" id="replace" name="replace" size="30"><br />
<br/><br/>


<button onclick="newrep()">Find and Replace</button>
<br/><br/>
</main>

I am building project which I want to deploy on my own static ip server (apache2). I am using postgresql database and python api (want to use it just as API not frontend), currently I am making frontend where I need to use node packages because I need to download and install OpenLayers for usage with OSM maps, when I build nodejs project I get dist/ directory which I need to put to production. I would like to know if it means that I can just put it to /var/www/html directory and if no please where should put it? Or please some explanation how it works 🙂 Thank you very much.

I am creating with javascript that when I select the like button it prints Hi.
I don’t understand why when inspecting it is not selecting the button.
I don’t understand what I’m doing wrong.
Can it be that I do not get the javascript url?

index.hmtl

<script src="{% static 'network/index.js' %}"></script>

<form method="post">{%csrf_token%}
        <button onclick="darLike()">Like</button>
        <a id="resultado"></a>
        <svg xmlns="http://www.w3.org/2000/svg" width="16 " height="16 " fill="currentColor " class="bi bi-heart " viewBox="0 0 16 16 ">
            <path d="m8 2.748-.717-.737C5.6.281 2.514.878 1.4 3.053c-.523 1.023-.641 2.5.314 4.385.92 1.815 2.834 3.989 6.286 6.357 3.452-2.368 5.365-4.542 6.286-6.357.955-1.886.838-3.362.314-4.385C13.486.878 10.4.28 8.717 2.01L8 2.748zM8 15C-7.333
            4.868 3.279-3.04 7.824 1.143c.06.055.119.112.176.171a3.12 3.12 0 0 1 .176-.17C12.72-3.042 23.333 4.867 8 15z "/>
        </svg>
    </form>

index.js

document.addEventListener('DOMContentLoaded', function() {
    document.addEventListener('click', () => function darLike() {
        const contenido = document.querySelector('#resultado')
        fetch(`like/${post.id}`, {
                method: 'POST',
                headers: {
                    'X-CSRFToken': csrftoken
                }
            })
            // Put response into json form
            .then(response => response.json())
            .then(data => {
                console.log(data);
                contenido.innerHTML = "Hi"
            })
            // Catch any errors and log them to the console
            .catch(error => {
                console.log('Error:', error);
            });
    });
    // Prevent default submission
    return false;
})

I’m using TUI Calendar as a scheduler and all works as expected up until trying to prevent schedules from overlapping. There doesn’t seem to be a config item for this like on FullCalendar which uses slotEventOverlap: false,.

I was wondering if anyone has come into this problem and has resolved it another way as I don’t think TUI Calendar has a similar config item?

I have tried using the beforeCreateSchedule event to compare against other schedule items but can’t seem to gain access to the other schedules on the calendar.