thiscodeWorks - Saving, organizing & sharing the best of code online

How to Save HTML Form Data in JSON - Express

<form action="/new" method="post">
 
  <input name="title" type="text">
  <input name="description" type="text">
  <button type="submit">Submit Form</button>
 
</form>

> More steps

#javascript

Get URL and URL Parts in JavaScript

@FlowerFine

var newURL = window.location.protocol + "//" + window.location.host + "/" + window.location.pathname + window.location.search

f5

@buildadev

function greet(name)
{
    console.log("Hello "+name);
};

res = greet("john");
console.log(res);

#historicalcode #numbers

The Vancouver Stock Exchange’s Rounding Error that Dropped the Market Value by Half

@chrissyjones

- return floor(value)
+ return round(value)

#java #howto #interviewquestions #mobile

How to use Java Swing to create a button

@price_the_ice

import javax.swing.*;  
public class FirstSwingExample {  
public static void main(String[] args) {  
JFrame f=new JFrame();//creating instance of JFrame  
          
JButton b=new JButton("click");//creating instance of JButton  
b.setBounds(130,100,100, 40);//x axis, y axis, width, height  
          
f.add(b);//adding button in JFrame  
          
f.setSize(400,500);//400 width and 500 height  
f.setLayout(null);//using no layout managers  
f.setVisible(true);//making the frame visible  
}  
}

#javascript #nodejs #commandline

HTTPS Redirect in Nodejs

@mishka

npm install heroku-ssl-redirect

> More steps

Debloat Windows 10 in 2021 – Chris Titus Tech

@admariner

iex ((New-Object System.Net.WebClient).DownloadString('https://git.io/JJ8R4'))

#javascript

Full Stack Developer

@rajesh

function full_stack_developer() {
    full_stack_developer();
}

Detecting combination keypresses (Control, Alt, + Keyboard Letter)

@sid

document.addEventListener %28"keydown", function (zEvent%29 {
    if (zEvent.ctrlKey  &&  zEvent.altKey  &&  zEvent.key === "e") {  // case sensitive
        // DO YOUR STUFF HERE
    }
} );

#html #javascript #jsfunctions #dom #dommanipulation

getAttribute() - how to get the value of any attribute of HTML element

@_right_away_

<html>

<input id="contact" name="address">

<script>

    var x = document.getElementById("contact").getAttribute('name');

</script>

</html>

#ios #swift #howto #appdevelopment #apps

Alert Controller for Swift 5 in Xcode

@0musicon0

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>IDECodeSnippetCompletionPrefix</key>
	<string>snippetAlert</string>
	<key>IDECodeSnippetCompletionScopes</key>
	<array>
		<string>All</string>
	</array>
	<key>IDECodeSnippetContents</key>
	<string>let alertController = UIAlertController(title: &lt;#T##String?#&gt;, message: &lt;#T##String?#&gt;, preferredStyle: &lt;#T##UIAlertController.Style#&gt;)
let firstAction = UIAlertAction(title: &lt;#T##String?#&gt;, style: .default, handler: &lt;#T##((UIAlertAction) -&gt; Void)?##((UIAlertAction) -&gt; Void)?##(UIAlertAction) -&gt; Void#&gt;)
let cancelAction = UIAlertAction(title: &lt;#T##String?#&gt;, style: .cancel, handler: nil)

alertController.addAction(firstAction)
alertController.addAction(cancelAction)
present(alertController, animated: true)</string>
	<key>IDECodeSnippetIdentifier</key>
	<string>8C458AD7-C631-457B-85CC-D2501E425D59</string>
	<key>IDECodeSnippetLanguage</key>
	<string>Xcode.SourceCodeLanguage.Swift</string>
	<key>IDECodeSnippetSummary</key>
	<string></string>
	<key>IDECodeSnippetTitle</key>
	<string>UIAlertController</string>
	<key>IDECodeSnippetUserSnippet</key>
	<true/>
	<key>IDECodeSnippetVersion</key>
	<integer>2</integer>
</dict>
</plist>

#javascript

Replace Textarea with Codemirror editor

@mishka

<link rel="stylesheet" type="text/css" href="plugin/codemirror/lib/codemirror.css">

<body>
	<textarea class="codemirror-textarea"></textarea>
</body>

<script>

$(document).ready(function(){
    var codeText = $(".codemirror-textarea")[0];
    var editor = CodeMirror.fromTextArea(codeText, {
        lineNumbers : true
    });
});

</script>

<script type="text/javascript" src="plugin/codemirror/lib/codemirror.js"></script>

#react.js #redux

Check if token expires and logout user

@davidTheNerdy

const [ user, setUser ] = useState(JSON.parse(localStorage.getItem('profile'))); //convert to object

const logout = () =>{
        dispatch({type: 'LOGOUT'});
        history.push("/");
        setUser(null);
    }

    useEffect(()=>{
        const token = user?.token;

        //JWT check if token expired
        if(token){
            const decodedToken = decode(token)
            if(decodedToken.exp*1000 < newDate().getTime()) logout();
        }
        setUser(JSON.parse(localStorage.getItem('profile')))
    },[location])

#javascript #javascript #functions #parameters

Required Parameters for Functions in JavaScript

@Dimples

 const isRequired = () => { throw new Error('param is required'); };

const hello = (name = isRequired()) => { console.log(`hello ${name}`) };

// These will throw errors
hello();
hello(undefined);

// These will not
hello(null);
hello('David');
The idea here is that it uses default parameters, like how the b parameter here has a default if you don’t send it anything:
function multiply(a, b = 1) {
  return a * b;
}

#javascript

Mapping an Object

@sid

const object1 = {
  a: 'somestring',
  b: 42
};

for (let [key, value] of Object.entries(object1)) {
  console.log(`${key}: ${value}`);
}

#javascript #nodejs

Save to MongoDB without Duplicates Using Mongoose

@bravocoder

var mongoose = require('mongoose');
var Schema = mongoose.Schema;

const exampleSchema = new Schema({
    title: { type: String , required: true},
    content: [{type: String}]
});


var Example = mongoose.model('Example', exampleSchema);
module.exports = Example;

> More steps

01-addNums

@anvarbek

def addNums(a,b):
    summa = a + b
    return summa

#javascript

Add event listener to multiple buttons with the same class

@mishka

    btns = document.getElementsByClassName("saveBtn");
    for (var i = 0; i < btns.length; i++) {
        btns[i].addEventListener("click", function () {
			//Add function here
        });
    }

#commandline #interesting #windows #ubuntu #linux

Useful snippet to easily access Ubuntu from Windows (in WSL2)

@swellcuban

ip addr | grep eth0 | grep inet | awk '{print $2}' | awk -F '/' '{print $1}' | awk '{printf "%s:3000", $0}' | clip.exe

#javascript

Copy Text to Clipboard with Line Breaks

@mishka

function copyToClipboard(){

    var codeToBeCopied = document.getElementById('code-snippet').innerText;
    var emptyArea = document.createElement('TEXTAREA');
    emptyArea.innerHTML = codeToBeCopied;
    const parentElement = document.getElementById('post-title');
    parentElement.appendChild(emptyArea);

    emptyArea.select();
    document.execCommand('copy');

    parentElement.removeChild(emptyArea);
    M.toast({html: 'Code copied to clipboard'})

    }

#javascript #jquery

jQuery.post() - AJAX for post requests

@prince333

$.ajax({
  type: "POST",
  url: url,
  data: data,
  success: success,
  dataType: dataType
});

#python

Getting the index of an item in a list containing it in Python

@bravocoder

>>> ["foo", "bar", "baz"].index("bar")
1

#javascript

Detect click outside element (vanilla JavaScript) - Stack Overflow

@mishka

var specifiedElement = document.getElementById(%27a%27);

//I%27m using "click" but it works with any event
document.addEventListener(%27click%27, function(event) {
  var isClickInside = specifiedElement.contains(event.target);

  if (!isClickInside) {
    //the click was outside the specifiedElement, do something
  }
});

#dart #flutter #layouts

How to make height of all widgets inside Row equal the tallest widget

@loop_ifthen

Widget build(BuildContext context) {
  return Scaffold(
    appBar: AppBar(title: Text('IntrinsicWidth')),
    body: Center(
      child: IntrinsicHeight(
        child: Row(
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: <Widget>[
            RaisedButton(
              onPressed: () {},
              child: Text('Short'),
            ),
            RaisedButton(
              onPressed: () {},
              child: Text('A bit Longer'),
            ),
            RaisedButton(
              onPressed: () {},
              child: Text('The Longest text button'),
            ),
          ],
        ),
      ),
    ),
  );
}

#javascript #promises #howto

How to Get the Domain From A URL Using Javascript

@saint_r0ses

var url = "http://scratch99.com/web-development/javascript/";
var urlParts = url.replace('http://','').replace('https://','').split(/[/?#]/);
var domain = urlParts[0];

Lambda expression Stream API doselect

@BHUPSAHU

import java.util.*;
import java.util.function.*;
import java.util.stream.Stream;
class Employee {
    String name;
    int salary;
    Employee(String name,int salary){
        this.name=name;
        this.salary=salary;
        }
        public String getName(){
            return name;
        }
        public int getSalary(){
            return salary;
        }
            public void setName(String name){
        this.name=name;
            }
            
        public void setSalary(int salary){
            this.salary=salary;
        }


    @Override
    public String toString() {
        StringBuilder sb = new StringBuilder("<");
        sb.append("name: ");
        sb.append(name);
        sb.append(" salary: ");
        sb.append("" + salary+">");
        return sb.toString();

    }
}
class EmployeeInfo{
    enum SortMethod {
        BYNAME,BYSALARY;
    };

    public List<Employee> sort(List<Employee> emps, final SortMethod method){
        if(method.equals(method.BYNAME)){
         
             Collections.sort(emps,(e1,e2)->{return e1.name.compareTo(e2.name);
             });
        }
             else if(method.equals(method.BYSALARY)){
                 
                Collections.sort(emps,(e1,e2)->{
                int i =e1.salary - e2.salary;
                if(i==0) {
                    return e1.name.compareTo(e2.name);
                }
                else {
                    return i;
                }
            });
             }
             return emps;
    }
   public boolean isCharacterPresentInAllNames(Collection<Employee> entities, String character){
       Predicate<Employee> p1=s -> s.name.contains(character);
        boolean b1 = entities.stream().allMatch(p1);
        return b1;
   }


}

#go

go - How to convert a zero-terminated byte array to string? - Stack Overflow

@tigran

  //split by separator and pick the first one. 
  //This has all the characters till null excluding null itself.
  retByteArray := bytes.Split(byteArray[:], []byte{0}) [0]

  // OR 

  //If you want a true C-like string including the null character
  retByteArray := bytes.SplitAfter(byteArray[:], []byte{0}) [0]

#css #html

Background Image That Doesn't Scroll on Webpage

@mishka

body{
    background-image: url("img_tree.gif");
    background-repeat: no-repeat;
    background-attachment: fixed;
}

#html

Bootstrap Starter Template

@mishka

<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">

    <title>Hello, world!</title>
  </head>
  <body>
    <h1>Hello, world!</h1>

    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
  </body>
</html>

Laravel vendor folder is missing - Easy way to regenerate it

@mebean

composer update

#javascript

javascript - Error: Request failed with status code 401 axios in React JS - Stack Overflow

@Avirup

axios.post('http://10.0.1.14:8001/api/logout',request_data, {
          headers: {
              'Content-Type': 'application/json',
              'Authorization': 'Bearer '+token
          },      
      })      
      .then((response) => {
        console.log('response',response.data)

      })
      .catch((error) => {
        alert('error',error.response)
        dispatch(userUpdateProfileFail())

      })

  // console.log('----cheers---------',data)
dispatch(userUpdateProfileSuccess(data))

#php

Elementor Form Block Eric Jones Email Spam

@Alz

//// Validate if Email field is spam
add_action( 'elementor_pro/forms/validation/email', function( $field, $record, $ajax_handler ) {
    // Looking if email found in spam array, you can add to the array
  $spamemails = array("ericjonesonline@outlook.com", "eric@talkwithwebvisitor.com");
    if ( in_array( $field['value'] , $spamemails) ) {
        $ajax_handler->add_error( $field['id'], 'אנחנו לא אוהבים ספאם, נסו מייל אחר' );
    }
}, 10, 3 );

#javascript

Loops and iteration - JavaScript | MDN

@bob

for (let step = 0; step < 5; step++) {
  // Runs 5 times, with values of step 0 through 4.
  console.log('Walking east one step');
}

#javascript

Add a Number to Two Variables At Once

@AngelGirl

 foo += -bar + (bar += 5);
// foo and bar are now 15

#ios #swift

Add Button Response in Swift

@mishka

@IBAction func doSomething()
@IBAction func doSomething(sender: UIButton)
@IBAction func doSomething(sender: UIButton, forEvent event: UIEvent)

#c++

nqueen

@rushi

#include<iostream>
using namespace std;
bool issafe(int** arr,int x,int y,int n){
    for(int row=0;row<=x;row++){
        if(arr[x][y]==1){
            return false;
        }
    }
    int row=x;
    int col=y;
    while(row>=0 && col>=0){
        if(arr[row][col]==1){
            return false;
        }
        row--;
        col--;
    }
     row=x;
     col=y;
    while(row>=0 && col<n){
        if(arr[row][col]==1){
            return false;
        }
        row--;
        col++;
    }
    return true ;
}
bool nqueen(int** arr,int x,int n){
    if(x>=n){
        return true;
    }
    for(int col=0;col<=n;col++){
        if(issafe(arr,x,col,n)){
            arr[x][col]==1;
            if(nqueen(arr,x+1,n)){
                return true;
            }
            arr[x][col]=0;  //backtracking
            
        }
    }
    return false;
}
int main(){
    int n;
    cin>>n;
    int** arr=new int*[n];
    for(int i=0;i<n;i++){
        arr[i]=new int[n];
        for(int j=0;j<n;j++){
            arr[i][j]=0;

        }
    }
    if(nqueen(arr,0,n)){
        for(int i=0;i<n;i++){
            for(int j=0;j<n;j++){
                cout<<arr[i][j]<<"";
            }cout<<endl;
        }
    }


    return 0;
}

#javascript

(1) Profile - Roblox

@fox_y09876

<span class="rbx-text-navbar-right text-header" id="nav-robux-amount">960</span>

01-faktorial

@anvarbek

def faktorial(N):
    i=1
    fakt=1
    while i!=N+1:
        fakt = fakt*i        
        i += 1
    return fakt

print(faktorial(5))

#python

Could not build wheels for tokenizers which use PEP 517 and cannot be installed directly

@_thiscodeworks

https://github.com/pydata/bottleneck/issues/281

#html #alpinejs

Set boolean to true after scrolling on page using Alpine.js

@klick

<div
    class="justify-between py-6 md:flex"
    x-data="{
        open: false,
        hasScrolled: false,
        reactOnScroll() {
            if (this.$el.getBoundingClientRect().top < 120 && window.scrollY > 120) {
                this.hasScrolled = true;
            } else {
                this.hasScrolled = false;
            }
        } 
    }"
    x-init="reactOnScroll()"
    @scroll.window="reactOnScroll()"
>

#javascript

Javascript / jQuery - map a range of numbers to another range of numbers - Stack Overflow

@arhan

const scale = (num, in_min, in_max, out_min, out_max) => {
  return (num - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}

How to extract date from text using Python regular expression?

@arielvol

import datetime
from datetime import date
import re
s = "Jason's birthday is on 1991-09-21"
match = re.search(r'\d{4}-\d{2}-\d{2}', s)
date = datetime.datetime.strptime(match.group(), '%Y-%m-%d').date()
print date

Turbo Drive

@delitescere

<h2>Turbo Drive</h2>
<div>
  <a href="/greeting/?person=Josh">Click here to greet Josh (fast)</a>
</div>
<div>
    <a href="/greeting/?person=Josh&sleep=true">Click here to greet Josh (slow)</a>
</div>

#c++

**8.11 (Game: nine heads and tails)

@mahmoud hussein

#include <iostream>
#include<cmath>
#include<ctime>
#include<string>
#include <iomanip>
#include <fstream>

using namespace std;




void decToBinary(int n)
{
    // array to store binary number 
    int binaryNum[3][3];
    
    //converting to binary 
    for (int i = 0; i < 3; i++) 
    {
        for (int j = 0; j < 3; j++)
        {
            binaryNum[i][j] = n % 2;
            n = n / 2;

        }
     }       

    // printing binary> array in reverse order 
    for (int i = 3-1; i >= 0; i--){
        for (int j = 3 - 1; j >= 0; j--)
        {
            if (binaryNum[i][j] == 0)
                cout << "H" << " ";
            else
                cout << "T" << " ";
        }
        cout << endl;
    }
    
 }

int main()
{
    int n;
    cout << "Enter a decimal number between 1 and 512 ";
    cin >> n;

    decToBinary(n);
    return 0;
}

##kotlin,#java,#android

view binding android

@swalia

// Android Studio 4.0
android {
    buildFeatures {
        viewBinding = true
    }
}

#javascript

Prevent duplicate values to be added to an array.

@mvieira

if (array.includes(value) === false) array.push(value);

Retrieving Fields in Open XML WordprocessingML Documents | Eric White

@ourexpertize

static void Main(string[] args)
{
    using (WordprocessingDocument doc =
        WordprocessingDocument.Open(“Test.docx”, false))
    {
        foreach (var f in doc.MainDocumentPart.Fields())
            Console.WriteLine(“Id: {0} InstrText: {1}”, f.Id, f.InstrText);
    }
}

#nodejs

Memcached Cloud session store with express-session to preserve sessions off-server

@mishka

var express = require("express");
var app = express();
const session = require('express-session');
var MemcachedStore = require('connect-memjs')(session);

// configure sessions
var store = new MemcachedStore({servers: [process.env.MEMCACHEDCLOUD_SERVERS], username: process.env.MEMCACHEDCLOUD_USERNAME, password: process.env.MEMCACHEDCLOUD_PASSWORD});
app.use(session({ secret: 'keyboard cat',
   resave: true,
   saveUninitialized: true,
   cookie: { secure: true }, 
   store: store
}))

#java #java #arraylists #while-loops #equala

How to insert ArrayList into While-condition?

@SunLoves

List<String> songList = new ArrayList<>();
songList.add("Some song"); //Repeat until satisfied

System.out.println("\n\tWelcome! Please choose a song!");
String songChoice = scan.nextLine();
while (!songList.contains(songChoice)) {
    //Do stuff when input is not a recognised song
}

#C#

Using csvHelper to read cell content into List or Array

@Anier

The TypeConverter class is under namespace CsvHelper.TypeConversion

The TypeConverterAttribute is under namespace CsvHelper.Configuration.Attributes

    public class ToIntArrayConverter : TypeConverter
    {
        public override object ConvertFromString(string text, IReaderRow row, MemberMapData memberMapData)
        {
            string[] allElements = text.Split(',');
            int[] elementsAsInteger = allElements.Select(s => int.Parse(s)).ToArray();
            return new List<int>(elementsAsInteger);
        }

        public override string ConvertToString(object value, IWriterRow row, MemberMapData memberMapData)
        {
            return string.Join(',', ((List<int>)value).ToArray());
        }
    }
To use this converter, simply add the following TypeConverterAttribute annotations on top of your properties:
To use this converter, simply add the following TypeConverterAttribute annotations on top of your properties:

    public class Names
    {
        [Name("name")]
        public string Name { get; set; }

        [Name("numbersA")]
        [TypeConverter(typeof(ToIntArrayConverter))]
        public List<int> NumbersA { get; set; }

        [Name("numbersB")]
        [TypeConverter(typeof(ToIntArrayConverter))]
        public List<int> NumbersB { get; set; }
    }

How to Save HTML Form Data in JSON - Express

Get URL and URL Parts in JavaScript

f5

The Vancouver Stock Exchange’s Rounding Error that Dropped the Market Value by Half

How to use Java Swing to create a button

HTTPS Redirect in Nodejs

Debloat Windows 10 in 2021 – Chris Titus Tech

Full Stack Developer

Detecting combination keypresses (Control, Alt, + Keyboard Letter)

getAttribute() - how to get the value of any attribute of HTML element

Alert Controller for Swift 5 in Xcode

Replace Textarea with Codemirror editor

Check if token expires and logout user

Required Parameters for Functions in JavaScript

Mapping an Object

Save to MongoDB without Duplicates Using Mongoose

01-addNums

Add event listener to multiple buttons with the same class

Useful snippet to easily access Ubuntu from Windows (in WSL2)

Copy Text to Clipboard with Line Breaks

jQuery.post() - AJAX for post requests

Getting the index of an item in a list containing it in Python

Detect click outside element (vanilla JavaScript) - Stack Overflow

How to make height of all widgets inside Row equal the tallest widget

How to Get the Domain From A URL Using Javascript

Lambda expression Stream API doselect

go - How to convert a zero-terminated byte array to string? - Stack Overflow

Background Image That Doesn't Scroll on Webpage

Bootstrap Starter Template

Laravel vendor folder is missing - Easy way to regenerate it

javascript - Error: Request failed with status code 401 axios in React JS - Stack Overflow

Elementor Form Block Eric Jones Email Spam

Loops and iteration - JavaScript | MDN

Add a Number to Two Variables At Once

Add Button Response in Swift

nqueen

(1) Profile - Roblox

01-faktorial

Could not build wheels for tokenizers which use PEP 517 and cannot be installed directly

Set boolean to true after scrolling on page using Alpine.js

Javascript / jQuery - map a range of numbers to another range of numbers - Stack Overflow

How to extract date from text using Python regular expression?

Turbo Drive

**8.11 (Game: nine heads and tails)

view binding android

Prevent duplicate values to be added to an array.

Retrieving Fields in Open XML WordprocessingML Documents | Eric White

Memcached Cloud session store with express-session to preserve sessions off-server

How to insert ArrayList into While-condition?

Using csvHelper to read cell content into List or Array

Save snippets that work with our extensions