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TypeError [ERR_INVALID_CALLBACK]: Callback must be a function. Received undefined

| | Category: Node-js

I m using nodejs, I got the following error while appending a file. The fs.appendFile function expecting third parameter as call back function.

How to calculate the age from jQuery ui datepicker using c#?

| | Category: asp.net MVC

In this tutorial I will show how to calculate age from date of birth using c#.

How to calculate days difference between two dates in c#?

| | Category: c# .net

In this tutorial I will show you how to calculate days difference between two days using c#.

Changing date format in jQuery ui datepicker

| | Category: JQuery

In this tutorial I will show you how to change date format in jQuery ui datepicker. First import the jQuery library and create input element, and then use jQuery datepicker() method with dateformat parameter.

How to set value to nicedit textarea using jQuery?

| | Category: JQuery

In this example I will show you how to update the value nicedit textarea using jQuery.

How to load data from json file in angular?

| | Category: Angular

In this tutorial I will show you how to bind data from json file in angular. I created a json file named data.json in local asset folder.

cannot find module consider using '--resolvejsonmodule' to import module with json extension angular

| | Category: Angular

I got this following error "cannot find module consider using '--resolvejsonmodule' to import module with json extension angular" while tried to import the json file in the component.

How to create multi select dropdown in Angular?

| | Category: Angular

Multi select dropdown in Angular using api.

Argument of type 'string | null' is not assignable to parameter of type 'string'.\n Type 'null' is not assignable to type 'string'

| | Category: Angular

In my angular project I got this error on localStorage "null' is not assignable to parameter of type 'string'"

No 'access-control-allow-origin' header is present on the requested resource Angular CORS policy Error

| | Category: Angular

I got this following error while running angular project “Access to XMLHttpRequest at 'https://localhost' from origin 'http://localhost:4200' has been blocked by CORS policy”

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