Rehmaanali

Consider the array [‘one’, ‘two’, ‘four’, ‘three’] and we want to arrange the last two element. /** * move element one place to other in existing array * @param {any[]} arr: array Value * @param {number} from: index of value that need to be moved * @param {number} to: index where need to be placed […]

In this tutorial, we will see how to Create a Library In Angular 12. Search Highlighter is what we are going to create throughout this article. If you are not aware of what is an angular library – Basically library is created to use some piece of code or you can say functionality to various […]

Consider an object from which we want to retrive properties. const obj = { earth: { level: { one: ‘soft mud and rocks’ } }, vibrations: [1, 2, { range: ‘medium’ }], }; Use […].map() for each selector, “vibrations[2].range”.replace() to replace square brackets with dots. Use “earth.level.one”.split(‘.’) to split each selector. Use […].filter() to remove […]

In the browser cookies is store in string format containing key-value pairs. So, how to parse a browser Cookie string and return an object of all cookie name-value pairs? separate each key-value pair using String.prototype.split(‘;’) Use Array.prototype.map() and String.prototype.split(‘=’) to separate keys from values in each pair. Use Array.prototype.reduce() and decodeURIComponent() to create an object […]

for loop in modern JavaScript is rarely talked about although it’s only useful in asynchronous operation scenarios. But what breaking out early consider the following example: Matching two array const smallArray = [0, 2]; const largeArray = Array.from({ length: 1000 }, (_, i) => i); const areEqual = (a, b) => { let result = […]

The simplest way to create a cookie is to assign a string value to the document.cookie object, for example- document.cookie = “key1 = value1; key2 = value2; expires = date”; // Example var now = new Date(); now.setTime(now.getTime() + 1 * 3600 * 1000); //set cookies to expire in 1 hour document.cookie = `${key} = […]

A callback function is a function that is passed to another function as an argument and is executed after some operation has been completed. for example of a simple callback function that logs to the console after some operations have been completed. function extendArray(arr, callback) { arr.push(100); // then execute the callback function that was […]

The SQL NULL value means a field with no value present in it. What is a SQL NULL Value? If a field in a table is optional in other words if it’s not mandatory, it is possible to insert a new record or update a record without adding a value to this field. Then, the […]

The SQL INSERT INTO statement is used to insert new records in a table. SQL INSERT INTO Statement There are two possible ways to insert data into the table using The INSERT INTO statement. Syntax Specifying both the column names and the values to be inserted: INSERT INTO table_name (column_1, column_2, column_3) VALUES (value_1, value_2, […]