This content originally appeared on DEV Community and was authored by Matin Imam
JavaScript is an incredibly versatile and powerful programming language, widely used for web development. Whether you're a seasoned developer or just starting out, having a handy set of JavaScript snippets can save you time and streamline your coding process. In this article, I've compiled 15 short and sweet JavaScript snippets that cover a variety of tasks. Let's dive in!
01. Get current data and time
const currentDateTime = new Date();
console.log(currentDateTime);
02. Find max number in array
const number = [5, 2, 7, 10, 1]
const maxNumber = Math.max(...number)
// 10
03. Shuffle array
function shuffleArray(array) {
return array.sort(() => Math.random() - 0.5);
}
04. Generate random number between 1 and 10
const randomNumber = Math.floor(Math.random() * 10) + 1;
console.log(randomNumber);
// 7
05. Convert string to lowercase
const str = 'Hello, World!''
console.log(str.toLowerCase());
// hello, world!
06. Check if even or odd number
const num = 5;
if (num % 2 === 0) {
console.log('Number is even');
} else {
console.log('Number is odd');
}
// 'Number is odd'
07. Create a simple 10 second countdown timer
let seconds = 5;
const countdown = setInterval(() => {
console.log(seconds);
seconds--;
if (seconds < 0) {
clearInterval(countdown);
console.log('Countdown finished!');
}
}, 1000);
// 5
// 4
// 3
// 2
// 1
// Countdown finsihed!
08. Convert array of numbers to array of strings
const numbers = [1, 2, 3, 4, 5];
const strings = numbers.map(String);
console.log(strings);
// ['1', '2', '3', '4', '5']
09. Remove duplicates
let arr = ["apple", "mango", "apple", "orange", "mango", "mango"];
const removeDuplicates = arr => [...new Set(arr)];
console.log(removeDuplicates(arr));
// ['apple', 'mango', 'orange']
10. Convert sentence to array of words
const sentence = "This is a sentence";
const words = sentence.split(" ");
console.log(words);
// ['This', 'is', 'a', 'sentence']
11. Repeat string
function repeatString(str, n){
return str.repeat(n);
}
const repeatedStr = ('abc', 3);
console.log(repeatedStr);
// 'abcabcabc'
12. Find intersection of arrays
// Define the intersection function
const intersection = (a, b) => a.filter(value => b.includes(value));
// Example arrays
const arrayA = [1, 2, 3, 4, 5];
const arrayB = [4, 5, 6, 7, 8];
// Use the intersection function to find common elements
const result = intersection(arrayA, arrayB);
// Log the result to the console
console.log(result);
// [4, 5]
13. Create dynamic strings
const name = 'Matin Imam';
const greeting = `Hello, ${name}!`;
console.log(greeting); // "Hello, Matin Imam!"
14. Merge objects
const person = {name: 'Matin'};
const details = {work: 'Developer'};
const fullDetails = {...person, ...details};
console.log(fullDetails);
// {name: 'Matin', age: 30}
15. Redirect to new URL after a delay
setTimeout(() => location.href = https://www.linkedin.com/in/matin-imam/", 5000);
These 15 JavaScript snippets are just a glimpse of what you can achieve with a few lines of code. Whether you're manipulating arrays, strings, or working with dates and times, these snippets can help streamline your development process.
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This content originally appeared on DEV Community and was authored by Matin Imam
Matin Imam | Sciencx (2024-07-19T03:33:59+00:00) 15 Short & Sweet JavaScript Snippets. Retrieved from https://www.scien.cx/2024/07/19/15-short-sweet-javascript-snippets/
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