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To run commands in the background in the PowerShell, you need to use Background job cmdlets. Background job means running commands/job in the background without occupying the console.Start-Job is one of the job scheduler cmdlets for PowerShell which runs PowerShell commands in the background without interacting with the current user session as a Job so that users can work in the PowerShell console without losing the control of the console while the command is running in the background.When PowerShell's job starts using Start-Job, a job returns the object immediately even if the job takes an extended time.Start-Job is designed to ... Read More
The includes() check whether array has a specific element, whereas splice() is used to add/remove items. Following is the code −ExampledeleteElementsFromArray = function(elements, ...values) { let elementRemoved = Array.from(values); for (var index = 0; index < elements.length; index++){ if (elementRemoved.includes(elements[index])){ elements.splice(index, 1); index--; } } return elements; } console.log(deleteElementsFromArray([80,90,56,34,79], 90, 34,79));To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo69.js.OutputThis will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo69.js [ 80, 56 ]
You can use a for loop and check whether the percentage is greater than 70 or not with if condition.Following are the records of each student −const studentDetails= [ { studentName:"John", percentage:78 }, { studentName:"Sam", percentage:68 }, { studentName:"Mike", percentage:88 }, { studentName:"Bob", percentage:70 } ]Now, use the for loop and et conditions for students with percentage more than 70 −for(var index=0;index 70) { ... Read More
To get seconds since epoch, use the below syntax −var anyVariableName= new Date(); Math.round(yourDateVariableName.getTime() / 1000);At first, get the current date −var currentDate= new Date();Now, get seconds since epoch −Examplevar currentDate= new Date(); var epochSeconds = Math.round(currentDate.getTime() / 1000); console.log(epochSeconds);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo67.js.OutputThis will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo67.js 1594821507
As we know the value 0 is for day Sunday and 6 for Saturday. First of all, you need to get day with the help of getDay().Let’s set a date −var givenDate=new Date("2020-07-18");Now, we will get the day −var currentDay = givenDate.getDay();Following is the code to determine if date is weekend −Examplevar givenDate=new Date("2020-07-18"); var currentDay = givenDate.getDay(); var dateIsInWeekend = (currentDay === 6) || (currentDay === 0); if(dateIsInWeekend==true){ console.log("The given date "+givenDate+" is a Weekend"); } else { console.log("The given date " +givenDate+"is a not a Weekend"); }To run the above program, you need to use the ... Read More
Flat array of objects into an object, you can use the concept of reduce(). Let’s say following is our array of objects −const studentDetails = [ {Name: "Chris"}, {Age: 22} ]Exampleconst studentDetails = [ {Name: "Chris"}, {Age: 22} ] const objectStudent = studentDetails.reduce((obj, value) => { return { ...obj, ...value } }, {}) console.log(objectStudent);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo64.js.OutputThis will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo64.js { Name: 'Chris', Age: 22 }
To split a string with separator after every word, the syntax is as follows −var anyVariableName=yourVariableName.split('parameter').filter(value=>value)Let’s say, the following is our string with separator −var sentence="-My-Name-is-John-Smith-I-live-in-US";Now, split the string with separator as in the below code.Examplevar sentence="-My-Name-is-John-Smith-I-live-in-US"; console.log("The value="+sentence); var result=sentence.split('-').filter(value=>value) console.log("After split()="); console.log(result);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo63.js.OutputThis will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo63.js The value=-My-Name-is-John-Smith-I-live-in-US After split()= [ 'My', 'Name', 'is', 'John', 'Smith', 'I', 'live', 'in', 'US' ]Read More
You can use the length property from JavaScript to get the length. Let’s create an Associative array −var details = new Array(); details["Name"] = "John"; details["Age"] = 21; details["CountryName"] = "US"; details["SubjectName"] = "JavaScript";Let us now get the length of the associative array −Examplevar details = new Array(); details["Name"] = "John"; details["Age"] = 21; details["CountryName"] = "US"; details["SubjectName"] = "JavaScript"; console.log("The length=="+Object.keys(details).length);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo.js.OutputThis will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo.js The length==4Read More
You need to subtract one week i.e. 7 days from the current date. Following is the syntax −var anyVariableName=new Date(yourCurrentDate.setDate(yourCurrentDate.getDate() - 7)At first, get the current date −var currentDate = new Date(); console.log("The current Date="+currentDate);Now, set the new date with setDate() method and subtract 7 days −Examplevar currentDate = new Date(); console.log("The current Date="+currentDate); var before7Daysdate=new Date(currentDate.setDate(currentDate.getDate() - 7)); console.log("The One week ago date="+before7Daysdate);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo60.js.OutputThis will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo60.js The current Date=Tue Jul 14 2020 19:12:43 GMT+0530 (India ... Read More
To updates, use the concept of fill() in JavaScript. The fill() method is used to fill the array elements with a static value. Following is the code −Exampleconst array= Array(4) var fillWithTrueValue=array.fill(true); const matrixWithOnlyBooleanTrue = Array(4).fill(fillWithTrueValue); console.log(matrixWithOnlyBooleanTrue);To run the above program, you need to use the following command −node fileName.js.Here, my file name is demo59.js.OutputThis will produce the following output −PS C:\Users\Amit\JavaScript-code> node demo59.js [ [ true, true, true, true ], [ true, true, true, true ], [ true, true, true, true ], [ true, true, true, true ] ]