split string every nth characters javascript

ByAnurag batra September 26, 2022September 6, 2022

var foo = "foofaafoofaafoofaafoofaafoofaa";
console.log( foo.match(/.{1,3}/g) );
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Here is what the above code is Doing:
1. The regex /.{1,3}/g is looking for any character (.) that occurs 1 to 3 times ({1,3}) and the g flag is telling it to repeat this search globally (g).
2. The string.match() method is looking for matches of the regex in the string and returning them in an array.
3. The result is an array of strings, each of which is a substring of the original string.

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formdata array of objects

ByAnurag batra October 13, 2022September 6, 2022

const formData = new FormData(); for (let key in form) { Array.isArray(form[key]) ? form[key].forEach(value => formData.append(key + ‘[]’, value)) : formData.append(key, form[key]) ; } Here is what the above code is Doing: 1. We create a new FormData object. 2. We loop through the form object. 3. If the value is an array, we loop…

print multidimensional array javascript using loop

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print multidimensional array javascript using loop

ByAnurag batra July 2, 2022June 30, 2022

let chunked = [[1,2,3], [4,5,6], [7,8,9]]; for(let i = 0; i < chunked.length; i++) { for(let j = 0; j < chunked[i].length; j++) { console.log(chunked[i][j]); } } Here is what the above code is Doing: 1. We have a for loop that iterates over the chunked array. 2. Inside the first for loop, we have...

Javascript Examples

set localstorage value

ByAnurag batra July 26, 2022June 30, 2022

var testObject = { ‘one’: 1, ‘two’: 2, ‘three’: 3 }; // Put the object into storage localStorage.setItem(‘testObject’, JSON.stringify(testObject)); // Retrieve the object from storage var retrievedObject = localStorage.getItem(‘testObject’); console.log(‘retrievedObject: ‘, JSON.parse(retrievedObject)); Here is what the above code is Doing: 1. We create a JavaScript object. 2. We stringify the JavaScript object. 3. We store…

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time taken for a function javascript

ByAnurag batra July 30, 2022June 30, 2022

console.time(“timer”); //start time with name = timer console.timeEnd(“timer”); //end timer and log time difference Here is what the above code is Doing: 1. We start a timer with the name timer. 2. We end the timer with the name timer. 3. The console.timeEnd() method logs the time difference between the start and end of the…

Javascript Examples

react native jest snapshot

ByAnurag batra September 28, 2022September 6, 2022

// __tests__/Intro-test.js import React from ‘react’; import renderer from ‘react-test-renderer’; import Intro from ‘../Intro’; test(‘renders correctly’, () => { const tree = renderer.create().toJSON(); expect(tree).toMatchSnapshot(); }); Here is what the above code is Doing: 1. We’re importing the React library, the renderer from react-test-renderer, and the component we want to test (Intro). 2. We’re creating a…

set background color dynamically javascript

Javascript Examples

set background color dynamically javascript

ByAnurag batra October 6, 2022September 6, 2022

document.body.style.backgroundColor=”white” Here is what the above code is Doing: 1. It’s creating a variable called “color” and setting it equal to a prompt that asks the user to enter a color. 2. It’s creating a variable called “element” and setting it equal to the “body” element. 3. It’s setting the “element” variable’s “style” property’s “backgroundColor”…

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