How can I use the paid version of my app as a “key” to the free version?

Use PackageManager to ensure your paid package is installed. AND ensure your free package signature matches installed premium package signature. Otherwise somebody would be able to install unsigned app with package name matching your paid package name and unlock premium this way. This post can help you to find your signature Detect if app was … Read more

‘MyhomePage({Key key, this.title}) : super(key: key);’ in Flutter – what would be a clear explanation with an example?

The code is the constructor of the MyHomepage widget. {Key key, this.title} It declares two optional named parameters (optional named because of {}) where the first is of name key with type Key the second is of name title with the type of the field this.title and automatically initializes this.title with the passed value. This … Read more

How to modify key in a dictionary in C#

As Jason said, you can’t change the key of an existing dictionary entry. You’ll have to remove/add using a new key like so: // we need to cache the keys to update since we can’t // modify the collection during enumeration var keysToUpdate = new List<int>(); foreach (var entry in dict) { if (entry.Key < … Read more

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)