Javascript Articles - Page 294 of 534

To check whether a checkbox is checked in jQuery, use the concept of toggle(). Following is the code −Example Live Demo Document Your name is Adam Smith    $('#selectName').click(function() {       $("#txtName").toggle(this.checked);    }); To run the above program, just save the file name anyName.html(index.html) and right click on the file and select the option open with live server in VS Code editor.OutputThis will produce the following output −When you select the check box, the following will be the output −

Let’s say the following is our dropdown −    John    David    Chris    Mike    Bob    Carol Following is our array −var listOfNames = ["Chris", "Robert", "Mike"];To check whether the selected list value contains a value in array, use −$(‘select’).on(‘change’).Example Live Demo Document John David Chris Mike Bob Carol    var listOfNames = ["Chris", "Robert", "Mike"];    $('select').on('change', function() {       var name = this.value.split(' ')[0];       if($.inArray(name, listOfNames) > -1) {          console.log('This is present in list ... Read More

A DB2 collection is a physical quantity which is used to group the packages. A collection can be simply termed as a group of DB2 packages. By using collections we can bind the same DBRM into different packages. In order to delete all the DB2 packers under a collection, we can issue below command.FREE PACKAGE(COLL1.*)The FREE PACKAGE reserved word is followed by the name of collection i.e. COLL1. The * after the collection name indicates that we need to perform delete action for all the packages under the said collection.

Let’s say the following is our list −var details=[    {id:101, name:"John", age:21},    {id:111, name:"David", age:24},    {id:1, name:"Mike", age:22},    {id:"", name:"Sam", age:20},    {id: 1, name:"Carol", age:23},    {id:null, name:"Robert", age:25},    {id:1, name:"Adam", age:24},    {id:"", name:"Chris", age:23} ];You can use the concept of filter to retrieve values based on specific ID.Examplevar details=[    {id:101, name:"John", age:21},    {id:111, name:"David", age:24},    {id:1, name:"Mike", age:22},    {id:"", name:"Sam", age:20},    {id: 1, name:"Carol", age:23},    {id:null, name:"Robert", age:25},    {id:1, name:"Adam", age:24},    {id:"", name:"Chris", age:23} ]; var getIdWithValue1 = details.filter(obj => obj.id === 1); console.log(getIdWithValue1);To ... Read More

Let’s say the following are our coordinates −var listOfStrings = ["10.45322, -6.8766363", "78.93664664, -9.74646646", "7888.7664664, -10.64664632"];To convert the above into two float lists of Latitude and Longitude, use split() on the basis of comma(, ) along with map().Examplevar listOfStrings = ["10.45322, -6.8766363", "78.93664664, -9.74646646", "7888.7664664, -10.64664632"]; var latitude = []; var longitude = []; listOfStrings.forEach(obj => obj.split(', ') .map(Number) .forEach((value, index) => [latitude, longitude][index].push(value)) ); console.log("All positive value is latitude=") console.log(latitude); console.log("All negative value is longitude=") console.log(longitude);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo180.js.OutputThis will produce the following output ... Read More

To ignore a specific value, use the logical Not (!) operator in if condition and fetch watching you want to include.Examplevar customerDetails=[    {       customerName:"John",       customerAge:28,       customerCountryName:"US"    },    {       customerName:"David",       customerAge:25,       customerCountryName:"AUS"    },    {       customerName:"Mike",       customerAge:32,       customerCountryName:"UK"    } ] for(var i=0;i node demo179.js The country name is=US The country name is=UK

Let’s say the following is our array of objects −var details = [{    studentName: "John",    studentMarks: 92 }, {    studentName: "David",    studentMarks: 89 }, {    studentName: "Mike",    studentMarks: 98 }, ];To get only specific values in an array of objects in JavaScript, use the concept of filter().Examplevar details = [{    studentName: "John",    studentMarks: 92 }, {    studentName: "David",    studentMarks: 89 }, {    studentName: "Mike",    studentMarks: 98 }, ]; var specificValuesFromArray = details.filter(obj => obj.studentMarks === 92 || obj.studentMarks === 98); console.log(specificValuesFromArray)To run the above program, you need to ... Read More

For this, you can use filter() along with map().Exampleconst details =[    { customerName: 'John', customerCountryName: 'UK', isMarried :true },    { customerName: 'David', customerCountryName: 'AUS', isMarried :false },    { customerName: 'Mike', customerCountryName: 'US', isMarried :false } ] let tempObject = details.filter(obj=> obj.isMarried == true); tempObject["customerNameWithIsMarriedFalse"] = details.filter(obj => obj.isMarried== false).map(obj => obj.customerName); console.log(tempObject);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo176.js.OutputThis will produce the following output −PS C:\Users\Amit\javascript-code> node demo176.js [    { customerName: 'John', customerCountryName: 'UK', isMarried: true }, customerNameWithIsMarriedFalse: [ 'David', 'Mike' ] ]

For this, use click() along with parseInt().Example Live Demo Document 10 addValue10EachTimePressMe    addValue = 0;    $("#addSequenceOf10").click(function() {       var actualValue = parseInt($("#add").html());       addValue =addValue+ actualValue;       $("#sequenceValue").html(addValue);    }); To run the above program, just save the file name anyName.html(index.html) and right click on the file and select the option open with live server in VS Code editor.OutputThis will produce the following output −Now, press the button you will get 10 then 20 30 40…….N; as in the below output −After clicking one more time, the snapshot is as follows.This will produce the following output −

When working with strings in JavaScript, you might encounter scenarios where you need to clean or format text by removing specific portions. A common task is to remove text after a comma and the following word. This can be achieved efficiently using JavaScript Regular Expressions (Regex). In this article, we’ll show you how to do it step-by-step. Why Use Regex for Text Manipulation? Regex, short for Regular Expressions, is a powerful tool for pattern matching and text processing. It allows you to identify and manipulate text patterns with precision, making tasks like cleaning data or reformatting strings much simpler. How ... Read More