Skip to main content

array.filter remove undefined value

I have two arrays. My first array is multidimensional. I am looping over the first array and checking if the index matches HeaderIndex value on an object in my second array. If so I am returning a new array with updated object. However I do not want my returned array to have any undefined values... I tried using array.filter

Here is my code below

const Array1 = [
  ['Alex', 'Boe', 'MeowWolf', 'pizza', 'pink', 'MeowWolf', 'corsair', 'coarse hair'],
  ['Arron', 'Coe', 'Kmart', 'tofu', 'purple', 'purr pull'],
  ['Jane', 'Doe', 'Sears', 'tacos', 'orange', 'Sears', 'see ears'],
  ['John', 'Eoe', 'YugiOh', 'blueberries', 'magenta'],
  ['Suzie', 'Boe', 'Toyota', 'steroids', 'blue']
]


const Array2 = [{
    header: 'First name',
    HeaderIndex: 0
  },
  {
    header: 'Last name',
    HeaderIndex: 1
  },
  {
    header: 'Company',
    HeaderIndex: 2
  },
  {
    header: 'Favorite food',
    HeaderIndex: 3
  },
  {
    header: 'Favorite color',
    HeaderIndex: 4
  },
]

const testResult = Array1.map(
  (arr) => arr.map(
    (string, index) => {
      if (Array2.filter(
          (obj) => obj.HeaderIndex === index)[0])
        return {
          "ChosenHeader": Array2.filter(
            (obj) => obj.HeaderIndex === index),
          "content": string
        }
    }))

console.log(testResult);

I am getting this result

0: (8) [{…}, {…}, {…}, {…}, {…}, undefined, undefined, undefined]
1: (6) [{…}, {…}, {…}, {…}, {…}, undefined]
2: (7) [{…}, {…}, {…}, {…}, {…}, undefined, undefined]
3: (5) [{…}, {…}, {…}, {…}, {…}]
4: (5) [{…}, {…}, {…}, {…}, {…}]

But I want something like this

0: (5) [{…}, {…}, {…}, {…}, {…}]
1: (5) [{…}, {…}, {…}, {…}, {…}]
2: (5) [{…}, {…}, {…}, {…}, {…}]
3: (5) [{…}, {…}, {…}, {…}, {…}]
4: (5) [{…}, {…}, {…}, {…}, {…}]
Via Active questions tagged javascript - Stack Overflow https://ift.tt/2FdjaAW
Labels:

Comments

Post a Comment

Popular posts from this blog

Why is my reports service not connecting?

I am trying to pull some data from a Postgres database using Node.js and node-postures but I can't figure out why my service isn't connecting. my routes/index.js file: const express = require('express'); const router = express.Router(); const ordersCountController = require('../controllers/ordersCountController'); const ordersController = require('../controllers/ordersController'); const weeklyReportsController = require('../controllers/weeklyReportsController'); router.get('/orders_count', ordersCountController); router.get('/orders', ordersController); router.get('/weekly_reports', weeklyReportsController); module.exports = router; My controllers/weeklyReportsController.js file: const weeklyReportsService = require('../services/weeklyReportsService'); const weeklyReportsController = async (req, res) => { try { const data = await weeklyReportsService; res.json({data}) console...
Post a Comment
Read more

How to show number of registered users in Laravel based on usertype?

i'm trying to display data from the database in the admin dashboard i used this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count(); echo $users; ?> and i have successfully get the correct data from the database but what if i want to display a specific data for example in this user table there is "usertype" that specify if the user is normal user or admin i want to user the same code above but to display a specific usertype i tried this: <?php use Illuminate\Support\Facades\DB; $users = DB::table('users')->count()->WHERE usertype =admin; echo $users; ?> but it didn't work, what am i doing wrong? source https://stackoverflow.com/questions/68199726/how-to-show-number-of-registered-users-in-laravel-based-on-usertype
Post a Comment
Read more

The number of nodes and edges I calculated manually and by a method provided by networkx library dont match

I am trying to analyse a graph using networkx library in Python. I have implemented a function that returns the nodes and edges of that graph. After that I counted the number of nodes and edges by implementing the len() function for nodes and edges, which gave me 17 for both nodes and edges. However, when I used the method graph.number_of_nodes() of networkx library it gave me 53. My code: import pandas as pd import networkx as nx import matplotlib.pyplot as plt header_list = ["a","b","w"] E =pd.read_csv("aves-barn-swallow-contact-network.edges",sep=" ",header= None,names=header_list) # print(E.head()) # prints first few rows of the csv file G = nx.from_pandas_edgelist(E,"a","b",["w"]) nx.draw(G) plt.show() class GraphAnalyse: #finding nodes and edges def nodeEdge(self,Graph): nodes = Graph.nodes() edges = Graph.edges() ...
Post a Comment
Read more