Content deleted Content added
m Disambiguating links to C string (link changed to C string handling) using DisamAssist. |
Funkywizard (talk | contribs) Tags: Reverted Mobile edit Mobile web edit |
||
Line 55:
=== Implementations ===
{{anchor|String Buffers}}
Some languages, such as [[C++]], [[Perl]] and [[Ruby (programming language)|Ruby]], normally allow the contents of a string to be changed after it has been created; these are termed ''mutable'' strings. In other languages, such as [[Java (programming language)|Java]], [[JavaScript]], [[Lua (programming language)|Lua]], [[Python (programming language)|Python]], and [[Go (programming language)|Go]], the value is fixed and a new string must be created if any alteration is to be made; these are termed ''immutable'' strings. Some of these languages with immutable strings also provide another type that is mutable, such as Java and [[.NET Framework|.NET]]'s {{Javadoc:SE|java/lang|StringBuilder}}, the thread-safe Java {{Javadoc:SE|java/lang|StringBuffer}}, and the [[Cocoa (API)|Cocoa]] <code>NSMutableString</code>. There are both advantages and disadvantages to immutability: although immutable strings may require inefficiently creating many copies, they are simpler and completely [[Thread safety|thread-safe]]<ref>IOFLOOD Python Mutable and Immutable Objects[https://ioflood.com/blog/mutable-vs-immutable-in-python-object-data-types-explained/#Understanding_Immutable_Objects_in_Python]</ref>.
Strings are typically implemented as [[array data type|arrays]] of bytes, characters, or code units, in order to allow fast access to individual units or substrings—including characters when they have a fixed length. A few languages such as [[Haskell (programming language)|Haskell]] implement them as [[linked list]]s instead.
| |||