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To parse JSON, use parseJSON() and for displaying a specific pair, use the $.each() function.Let’s say the following is our JSON, which is parsed −const APIData = '[{"Name":"John", "Age":21}, {"Name":"David", "Age":24}, {"Name":"Bob", "Age" :20}]'; const getObject = jQuery.parseJSON(APIData);Now, let’s see the complete code and fetch the “Name” pairs −Example Live Demo Document const APIData = '[{"Name":"John", "Age":21}, {"Name":"David", "Age":24}, {"Name":"Bob", "Age":20}]'; const getObject = jQuery.parseJSON(APIData); $.each(getObject, function (k, obj) { console.log(obj['Name']); }); To run the above program, save the file name ... Read More
To find all subsets of a set, use reduce() along with map() in JavaScript. Let’s say, we are passing the set [8,9] and finding the subsets.Exampleconst findAllSubsetsoOfGivenSet = originalArrayValue => originalArrayValue.reduce( (givenSet, setValue) => givenSet.concat( givenSet.map(givenSet => [setValue,...givenSet]) ), [[]] ); console.log(findAllSubsetsoOfGivenSet([8,9]));To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo36.js.OutputThis will produce the following output.PS C:\Users\Amit\JavaScript-code> node demo36.js [ [], [ 8 ], [ 9 ], [ 9, 8 ] ]
To convert an object into an array, use push() in JavaScript. Following is the code −ExamplestudentDetails= [ { studentName:"Chris",studentMarks:34}, { studentName:"David",studentMarks:89} ] var convertIntoArray = []; for (var i = 0; i < studentDetails.length; i++) { convertIntoArray.push(studentDetails[i].studentName); } console.log(convertIntoArray);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo35.js.OutputThis will produce the following output.PS C:\Users\Amit\JavaScript-code> node demo35.js [ 'Chris', 'David' ]
To cut a string after X characters, use substr() function from JavaScript. Following is the JavaScript code wherein we are cutting the string after 9th character −Examplevar myName="JohnSmithMITUS"; console.log("The String="+myName) var afterXCharacter = myName.substr(0, 9) + "\u0026"; console.log("After cutting the characters the string="+afterXCharacter);Above, the unicode “\u0026” will replace all the characters with &(“\u0026”).To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo34.js.OutputThis will produce the following output.PS C:\Users\Amit\JavaScript-code> node demo34.js The String=JohnSmithMITUS After cutting the characters the string=JohnSmith&Read More
For this, you can use find() along with a map(). Let’s say we have student records with name, rollno and subject.Examplevar firstObject= [ { "FirstName": "David", "RollNo": "105", "Subject": "MongoDB" }, { "FirstName": "Mike", "RollNo": "110", "Subject": "JavaScript"} ]; var secondObject= [ { "FirstName": "Bob", "RollNo": "101", "Subject": "Java" }, { "FirstName": "John", "RollNo": "110", "Subject": "MySQL" } ]; var output = firstObject.map(first=>(secondObject.find(second=>second.RollNo==first.R ollNo) || first)); console.log(output);To run the above program, you need to use the following command −node fileName.jsHere, my file name is demo33.js.OutputThis will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo33.js [ ... Read More
To separate the special character, use the concept of match() with Regular Expression. The syntax is as follows −yourStringName.flatMap(anyVariableName => yourVariableName.match(/\w+|\W+/g));Let’s say, the following is our array with special characters in between values −var allNames = ['John-Smith', 'David', 'Carol%Taylor'];Let’s now see how to separate text with special characters. Following is the code −Examplevar allNames = ['John-Smith', 'David', 'Carol%Taylor']; var output = allNames.flatMap(obj => obj.match(/\w+|\W+/g)); console.log(output);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo32.js.OutputThis will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo32.js [ 'John', '-', 'Smith', 'David', ... Read More
To extract the value of the , use −document.getElementById(“yourTextIdValue”).textContentExample Live Demo Document This is the JavaScript.... var originalText = document.getElementById("myText").textContent; console.log(originalText); 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 display the value −
Let’s say we have the following strings. One of them is beginning with a question mark i.e. punctuation −var sentence1 = 'My Name is John Smith.' var sentence2 = '? My Name is John Smith.'We need to check whether any of the above two sentences begin with punctuation. To check if string begins with punctuation, the code is as follows −Examplevar punctuationDetailsRegularExpression=/^[., :!?]/ var sentence1 = 'My Name is John Smith.' var output1 = !!sentence1.match(punctuationDetailsRegularExpression) if(output1==true) console.log("This ("+sentence1+") starts with a punctuation"); else console.log("This ("+sentence1+") does not starts with a punctuation"); var sentence2 = '? My Name is ... Read More
Let’s say the following is our string with whitespace −var fullName=" John Smith ";Use replace() and set Regex in it to remove whitespaces.Examplefunction removeSpacesAtTheBeginningAndTheEnd(name) { return name.toString().replace(/^\s+|\s+$/g,''); } var fullName=" John Smith "; var valueAfterRemovingSpace=removeSpacesAtTheBeginningAndTheEnd(fullName) console.log(valueAfterRemovingSpace);To run the above program, you need to use the following command −node fileName.js.Here my file name is demo208.js.OutputThis will produce the following output −PS C:\Users\Amit\javascript-code> node demo208.js John Smith
Let’s say the following is our array −var numbers = [10, 3, 40, 50, 20, 30, 100]We need to search two numbers from the above array elements, whose sum is 80.For this, use simple for loop with if condition.Examplefunction specificPairsOfSumOfTwoNumbers(numbers, totalValue) { var storeTwoNumbersObject = {} for(var currentNumber of numbers) { if(storeTwoNumbersObject[currentNumber]) { return { firstNumber: totalValue-currentNumber, secondNumber:currentNumber} } ... Read More