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Append-only data structures grow over time, with more and more space dedicated to "stale" data found only in the history and more time wasted on parsing these data. A number of append-only systems implement rewriting (copying garbage collection), so that a new structure is created only containing the current version and optionally a few older ones.
In Pascal, a set is a collection of elements of the same type. The Smart Pascal syntax currently supports only sets of enumerations with the "in" operator and "include(aSet, aValue)" or "exclude(aSet, aValue)" methods. Smart Pascal does not support generics. The original syntax of Delphi Web Script Smart Pascal derives from was compatible with ...
Win32 SDK functions CreateFile, ReadFile, WriteFile and CloseHandle open, read from, write to, and close a pipe, respectively. Unlike Unix, there is no command line interface, except for PowerShell. Named pipes cannot be created as files within a normal filesystem, unlike in Unix.
Redis can rewrite the append-only file in the background to avoid an indefinite growth of the journal. Journaling was introduced in version 1.1 and is generally considered the safer approach. By default, Redis writes data to a file system at least every 2 seconds, with more or less robust options available if needed.
In computer science, read–modify–write is a class of atomic operations (such as test-and-set, fetch-and-add, and compare-and-swap) that both read a memory location and write a new value into it simultaneously, either with a completely new value or some function of the previous value.
Following Lisp, other high-level programming languages which feature linked lists as primitive data structures have adopted an append. To append lists, as an operator, Haskell uses ++, OCaml uses @. Other languages use the + or ++ symbols to nondestructively concatenate a string, list, or array.
In Unix and Unix-like operating systems, chmod is the command and system call used to change the access permissions and the special mode flags (the setuid, setgid, and sticky flags) of file system objects (files and directories).
The character sequence of two slash characters (//) after the string file: denotes that either a hostname or the literal term localhost follows, [3] although this part may be omitted entirely, or may contain an empty hostname.