Tutorial by Topics: s

Node.js is an event-based, non-blocking, asynchronous I/O framework that uses Google's V8 JavaScript engine. It is used for developing applications that make heavy use of the ability to run JavaScript both on the client, as well as on server side and therefore benefit from the re-usability of code...

Perl is the camel of languages: useful, but not always beautiful. It has rather good documentation of its own which can be accessed using the perldoc command from your shell/command prompt. It's also available online at perldoc.perl.org. VersionRelease NotesRelease Date1.0001987-12-182.0001988...

Indexes are a data structure that contains pointers to the contents of a table arranged in a specific order, to help the database optimize queries. They are similar to the index of book, where the pages (rows of the table) are indexed by their page number. Several types of indexes exist, and can be...

All searching algorithms on iterables containing n elements have O(n) complexity. Only specialized algorithms like bisect.bisect_left() can be faster with O(log(n)) complexity.

Visual Basic .NET is the official successor to Microsoft's original Visual Basic programming language. Visual Basic [.NET] appears to have similarities to Python with the lack of semicolons and brackets, but shares with C++ the basic structure of functions. Curly braces are absent in VB .NET, but ...

ParameterDetailsPARTITION BYThe field(s) that follows PARTITION BY is the one that the 'grouping' will be based on The OVER clause determines a windows or a subset of row within a query result set. A window function can be applied to set and compute a value for each row in the set. The OVER claus...

git rebase [-i | --interactive] [options] [--exec <cmd>] [--onto <newbase>] [<upstream>] [<branch>] git rebase [-i | --interactive] [options] [--exec <cmd>] [--onto <newbase>] --root [<branch>] git rebase --continue | --skip | --abort | --edit-todo ...

The Dropbox API allows developers to build Dropbox functionality directly into their apps. The API allows access to features such as file uploading, downloading, sharing, searching, and restoration. The API can be used across platforms such as Windows, Mac, Linux, iOS, Android, or any other that ...

Editing R Docs on Stack Overflow See the documentation guidelines for general rules when creating documentation. A few features of R that immigrants from other language may find unusual Unlike other languages variables in R need not require type declaration. The same variable can be assi...

Rust is a systems programming language designed for safety, speed, and concurrency. Rust has numerous compile-time features and safety checks to avoid data races and common bugs, all with minimal to zero runtime overhead. Stable VersionRelease Date1.17.02017-04-271.16.02017-03-161.15.12017-02...

trap action sigspec... # Run "action" on a list of signals trap sigspec... # Omitting action resets traps for signals ParameterMeaning-pList currently installed traps-lList signal names and corresponding numbers The trap utility is a special shell built-in. It's defined in POSI...

ls [OPTION]... [FILE]... OptionDescription-a, --allList all entries including ones that start with a dot-A, --almost-allList all entries excluding . and ..-cSort files by change time-d, --directoryList directory entries-h, --human-readableShow sizes in human readable format (i.e. K, M)-HSame...

Shell aliases are a simple way to create new commands or to wrap existing commands with code of your own. They somewhat overlap with shell functions, which are however more versatile and should therefore often be preferred. The alias will only be available in the shell where the alias command...

Integer Literals is a numeral without a decimal point for example 0, 1, 42, ... is implicitly applied to fromInteger which is part of the Num type class so it indeed has type Num a => a - that is it can have any type that is an instance of Num Fractional Literals is a numeral with a ...