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Aug 13, 2023CAS
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More JavaScript Posts

Zybooks?

Oct 29, 2020LeifMessinger

0 likes • 2 views

questions = Array.from(document.querySelectorAll(".multiple-choice-question"));
async function hackRadio(question){
if(question.querySelector(".question-chevron").getAttribute("aria-label") == "Question completed") return;
let answerChoices = question.querySelectorAll(".zb-radio-button");
async function guess(answerChoice){
answerChoice.querySelector("label").click();
}
let pause = 0;
for(let answerChoice of answerChoices){
setTimeout(()=>{guess(answerChoice)},pause); //No need to check given that it will record the correct answer anyways.
pause += 1000;
}
}
for(let question of questions){
hackRadio(question);
}
questions = Array.from(document.querySelectorAll(".short-answer-question"));
async function hackShortAnswer(question){
if(question.querySelector(".question-chevron").getAttribute("aria-label") == "Question completed") return;
question.querySelector("textarea").value = question.querySelector(".forfeit-answer").textContent;
//question.querySelector(".check-button").click(); They are smart bastards
}
for(let question of questions){
const showAnswerButton = question.querySelector(".show-answer-button");
showAnswerButton.click();
showAnswerButton.click();
hackShortAnswer(question);
}

React Short Circuit Evaluation

Feb 3, 2021C S

0 likes • 1 view

import React, { useState } from 'react' import Welcome from '../components/Welcome' function About() { const [showWelcome, setShowWelcome] = useState(false) return ( <div> {showWelcome ? <Welcome /> : null} </div> <div> {showWelcome && <Welcome /> } </div> ) } export default App

format duration

Nov 19, 2022CodeCatch

0 likes • 0 views

const formatDuration = ms => {
if (ms < 0) ms = -ms;
const time = {
day: Math.floor(ms / 86400000),
hour: Math.floor(ms / 3600000) % 24,
minute: Math.floor(ms / 60000) % 60,
second: Math.floor(ms / 1000) % 60,
millisecond: Math.floor(ms) % 1000
};
return Object.entries(time)
.filter(val => val[1] !== 0)
.map(([key, val]) => `${val} ${key}${val !== 1 ? 's' : ''}`)
.join(', ');
};
formatDuration(1001); // '1 second, 1 millisecond'
formatDuration(34325055574); // '397 days, 6 hours, 44 minutes, 15 seconds, 574 milliseconds'

Mee6 Spam Calculator

Mar 10, 2022LeifMessinger

0 likes • 1 view

//Use at https://mee6.xyz/leaderboard/732262089447702588
//Higher the spammy stat, the more spammy that person is.
//This is because mee doesn't give experience to people who post more comments in a minute.
function statBlock(title, value){
let elm = document.createElement("div");
elm.className = "leaderboardPlayerStatBlock";
let titleElm = document.createElement("div");
titleElm.className = "leaderboardPlayerStatName";
titleElm.textContent = title;
let valueElm = document.createElement("div");
valueElm.className = "leaderboardPlayerStatValue";
valueElm.textContent = value;
elm.appendChild(titleElm);
elm.appendChild(valueElm);
elm.remove = function(){
this.parentElement.removeChild(this);
}
return elm;
}
for(let player of Array.from(document.getElementsByClassName("leaderboardPlayer"))){
if(player.spamminess) player.spamminess.remove();
let messages = null;
let experience = null;
const statBlockArray = Array.from(player.querySelectorAll(".leaderboardPlayerStatBlock"));
for(let statBlock of statBlockArray){
const statName = statBlock.querySelector(".leaderboardPlayerStatName").textContent;
const text = statBlock.querySelector(".leaderboardPlayerStatValue").textContent;
const number = ((text.includes("k"))? (text.replace("k","") * 1000.0) : +(text));
if(statName.includes("MESSAGES")){
messages = number;
}else if(statName.includes("EXPERIENCE")){
experience = number;
}
}
const stats = player.querySelector(".leaderboardPlayerStats");
const messagesElement = stats.firstChild;
const spamminess = ((messages/experience)*2000.0).toFixed(2);
player.spamminess = stats.insertBefore(statBlock("SPAMMINESS", spamminess), messagesElement);
}

localStorage Cookie Consent

Oct 9, 2023Helper

0 likes • 278 views

import React, { useState, useEffect } from 'react';
import Link from 'next/link';
export default function CookieBanner() {
// Initialize with a default value (false if not previously set in localStorage)
const [cookieConsent, setCookieConsent] = useState(() =>
localStorage.getItem('cookieConsent') === 'true' ? true : false
);
useEffect(() => {
const newCookieConsent = cookieConsent ? 'granted' : 'denied';
window.gtag('consent', 'update', {
analytics_storage: newCookieConsent
});
localStorage.setItem('cookieConsent', String(cookieConsent));
}, [cookieConsent]);
return !cookieConsent && (
<div>
<div>
<p>
We use cookies to enhance the user experience.{' '}
<Link href='/privacy/'>View privacy policy</Link>
</p>
</div>
<div>
<button type="button" onClick={() => setCookieConsent(false)}>Decline</button>
<button type="button" onClick={() => setCookieConsent(true)}>Allow</button>
</div>
</div>
)
}

Invert Binary Tree

Oct 15, 2022CodeCatch

2 likes • 8 views

var invertTree = function(root) {
const reverseNode = node => {
if (node == null) {
return null
}
reverseNode(node.left);
reverseNode(node.right);
let holdLeft = node.left;
node.left = node.right;
node.right = holdLeft;
return node;
}
return reverseNode(root);
};