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euclidean distance

0 likes • Nov 19, 2022
JavaScript
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Reverse a string

CodeCatch
0 likes • Nov 19, 2022
JavaScript
const reverse = str => str.split('').reverse().join('');
reverse('hello world');
// Result: 'dlrow olleh'

Composing components

CodeCatch
0 likes • Nov 19, 2022
JavaScript
function Welcome(props) {
return <h1>Hello, {props.name}</h1>;
}
function App() {
return (
<div>
<Welcome name="Sara" />
<Welcome name="Cahal" />
<Welcome name="Edite" />
</div>
);
}
ReactDOM.render(
<App />,
document.getElementById('root')
);

Authenticate Discord User

Test
0 likes • Mar 28, 2023
JavaScript
const Discord = require('discord.js');
const client = new Discord.Client();
const token = 'YOUR_BOT_TOKEN';
// When the bot is ready, log a message to the console
client.on('ready', () => {
console.log(`Logged in as ${client.user.tag}!`);
});
// When a user sends a message, check if they are authenticated
client.on('message', async (msg) => {
if (!msg.author.bot && !msg.author.authenticated) {
const filter = (m) => m.author.id === msg.author.id;
const collector = msg.channel.createMessageCollector(filter, { time: 15000 });
// Send an authentication message to the user
msg.author.send('Please authenticate yourself by clicking this link: ' + generateAuthURL(msg.author.id));
collector.on('collect', async (m) => {
// Check if the message contains the authentication code
if (m.content.startsWith('!auth ')) {
const code = m.content.slice(6);
const { access_token } = await getAccessToken(code);
// Set the user's authenticated status and access token
msg.author.authenticated = true;
msg.author.access_token = access_token;
collector.stop();
}
});
collector.on('end', () => {
if (!msg.author.authenticated) {
msg.author.send('Authentication timed out.');
}
});
}
});
// Generate an authentication URL for the user
function generateAuthURL(userId) {
const redirectURI = encodeURIComponent('YOUR_REDIRECT_URL');
const scopes = 'identify';
const clientID = 'YOUR_CLIENT_ID';
return `https://discord.com/api/oauth2/authorize?client_id=${clientID}&redirect_uri=${redirectURI}&response_type=code&scope=${scopes}&state=${userId}`;
}
// Exchange the authorization code for an access token
async function getAccessToken(code) {
const redirectURI = encodeURIComponent('YOUR_REDIRECT_URL');
const clientID = 'YOUR_CLIENT_ID';
const clientSecret = 'YOUR_CLIENT_SECRET';
const res = await fetch('https://discord.com/api/oauth2/token', {
method: 'POST',
headers: {
'Content-Type': 'application/x-www-form-urlencoded',
},
body: `grant_type=authorization_code&code=${code}&redirect_uri=${redirectURI}&client_id=${clientID}&client_secret=${clientSecret}`,
});
return await res.json();
}
client.login(token);

containsDuplicate

CodeCatch
0 likes • Nov 19, 2022
JavaScript
let nums = [1,2,3,1]
var containsDuplicate = function(nums) {
let obj = {};
for(let i =0; i< nums.length; i++){
if(obj[nums[i]]){
obj[nums[i]] += 1;
return true;
}else{
obj[nums[i]] = 1;
}
}
return false;
};
console.log(containsDuplicate(nums));

hamming distance

CodeCatch
0 likes • Nov 19, 2022
JavaScript
const hammingDistance = (num1, num2) =>
((num1 ^ num2).toString(2).match(/1/g) || '').length;
hammingDistance(2, 3); // 1

getURLParameters

CodeCatch
0 likes • Nov 19, 2022
JavaScript
const getURLParameters = url =>
(url.match(/([^?=&]+)(=([^&]*))/g) || []).reduce(
(a, v) => (
(a[v.slice(0, v.indexOf('='))] = v.slice(v.indexOf('=') + 1)), a
),
{}
);