The FrozenSet and FrozenDictionary classes introduced in .NET 8 are immutable collections optimized for fast look-ups. Here’s how to take advantage of them.

Each programming language implements its own standard library, which includes its own set of functions for manipulating with strings. We analyzed 10 popular languages and aggregated all 614 string ...

Beginning with Ruby 3.4.0, string literals in files without a frozen_string_literal comment will behave as if they were frozen.

The correct way to convert a String to long in Java is with the parseLong method of the wrapper class. The constructor conversion approach is deprecated! Use parseLong instead.

java.lang.IllegalArgumentException: com.example.exercise: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent. Strongly ...

However, consider using strings as keys for a hash map. If strings were mutable, you could change those keys by changing the used strings. The immutability of strings prevents such changes, thus ...