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At first, set the element −Replace This strong tagThe id attribute set above would be used set the text using # −$(document).ready(function(){ $("#strongDemo").html("Actual value of 5+10 is 15....."); });Example Live Demo Document Replace This strong tag $(document).ready(function(){ $("#strongDemo").html("Actual value of 5+10 is 15....."); }); To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.OutputThis will produce the following output −
To set an element and it’s text, use the text() method in jQuery. With that, use the :nth-child selector to place it at a particular position. Following is the code −Example Live Demo Document JavaScript MySQL MongoDB Java C# $('h1:nth-child(4)').text("Python"); To run the above program, save the file name “anyName.html(index.html)” and right click on the file. Select the option “Open with Live Server” in VS Code editor.OutputThis will produce the following output −
To group JSON data, you need to extract all the keys and use the push(). Following is the code −Examplevar details= { "1": { name:"John" }, "2": { name:"John" }, "3": { name:"David" } var objectWithGroupByName = {}; for (var key in details){ var name = details[key].name; if (!objectWithGroupByName[name]){ objectWithGroupByName[name] = []; } objectWithGroupByName[name].push(details[key]); } console.log(objectWithGroupByName);To run the above program, you need to use the following command −node fileName.js.OutputHere, my file name is demo122.js. This will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo122.js { John: [ { name: 'John' }, { name: 'John' } ], David: [ { name: 'David' } ] }
Let’s say the following is our variable −var message = 'This is the Class Demo';Following is our object, var object = new FirstClass(message)The class FirstClass −class FirstClass{ constructor( message){ this.message = message; } }We will use eval() to call a JavaScript class object with variable. Following is the code −Exampleclass FirstClass{ constructor( message){ this.message = message; } } var message = 'This is the Class Demo'; var object = new FirstClass(message) console.log(eval(object).message);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo121.js.OutputThis ... Read More
Let’s say the following is our object −var details ={ firstName: "John", lastName: "Smith", age:21, subjectName:"JavaScript", marks:89, coutryName:"US", collegeName:"MIT", passoutYear:2018 };Following is the code to fetch only a subset −Examplevar details ={ firstName: "John", lastName: "Smith", age:21, subjectName:"JavaScript", marks:89, coutryName:"US", collegeName:"MIT", passoutYear:2018 }; var selectedFieldFromObjectDetails = (({ firstName, subjectName, marks, passoutYear }) => ({ firstName, subjectName, marks, passoutYear }))(details); console.log(selectedFieldFromObjectDetails);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo120.js.OutputThis will produce the following output −PS ... Read More
Let’s say the following is our comma separated text in div − This, is, the, first, JavaScript, program To convert comma separated text into separate lines, you need to use trim() along with split() on the basis of comma(, ).Example Live Demo Document This, is, the, first, JavaScript, program var allTheData = document.querySelector('.commaSeparated').textContent.trim().split(', ') var separateList = '' allTheData.forEach(function(value) { separateList += '' + value + ''; }); separateList += ''; document.querySelector(".commaSeparated").innerHTML = separateList; To run the ... Read More
Let’s say the following is our nested objects −var details = [ { id:"101", firstName:"John", lastName:"Smith", age:25, countryName:"US", subjectDetails: { subjectId:"Java-101", subjectName:"Introduction to Java" }, }, { "uniqueId": "details_10001" } ]Use map() along with typeOf to access nested objects. Following is the code −Examplevar details = [ { id:"101", firstName:"John", lastName:"Smith", ... Read More
Let’s say the following is our object −var details = { firstName: 'John', lastName: '', countryName: 'US' }Use Object.keys() along with find() to get the key name with empty value. Following is the code −Examplevar details = { firstName: 'John', lastName: '', countryName: 'US' } var result = Object.keys(details).find(key=> (details[key] === '' || details[key] === null)); console.log("The key is="+result);To run the above program, you need to use the following command −node fileName.js.OutputHere, my file name is demo118.js. This will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo118.js The key is=lastNameRead More
In this tutorial, we will be discussing a program to find maximum sum subsequence with at-least k distant elements.For this we will be provided with an array containing integers and a value K. Our task is to find the subsequence having maximum sum such that all the elements are at least K elements apart.Example Live Demo#include using namespace std; //finding maximum sum subsequence int maxSum(int arr[], int N, int k) { int MS[N]; MS[N - 1] = arr[N - 1]; for (int i = N - 2; i >= 0; i--) { if (i ... Read More
In this tutorial, we will be discussing a program to find maximum sum subarray such that start and end values are same.For this we will be provided with an array containing integers. Our task is to find the subarray with the maximum sum such that the elements are both its ends are equal.Example Live Demo#include using namespace std; //finding the maximum sum int maxValue(int a[], int n) { unordered_map first, last; int pr[n]; pr[0] = a[0]; for (int i = 1; i < n; i++) { pr[i] = pr[i - 1] + a[i]; ... Read More