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Docker is an open-source project that automates the deployment of applications inside software containers. These application containers are similar to lightweight virtual machines, as they can be run in isolation to each other and the running host. Docker requires features present in recent linux...

Lua is minimalistic, lightweight and embeddable scripting language. It's being designed, implemented, and maintained by a team at PUC-Rio, the Pontifical Catholic University of Rio de Janeiro in Brazil. The mailing list is open to get involved. Common use-cases for Lua includes scripting video...

selector match partialFunction selector match {list of case alternatives) // This is most common form of the above ParameterDetailsselectorThe expression whose value is being pattern-matched.alternativesa list of case-delimited alternatives.

svn copy [BRANCH-FROM-URL] [BRANCH-TO-URL] -m <COMMIT-LOG-MESSAGE> svn copy [^/PATH-TO-BRANCH-FROM] [^/PATH-TO-BRANCH-TO] -m <COMMIT-LOG-MESSAGE> As you might have noticed, we use svn copy command to create branches, tags and shelves (we'll skip mentioning tags and shel...

ASDF - Another System Definition Facility ASDF is a tool for specifying how systems of Common Lisp software are made up of components (sub-systems and files), and how to operate on these components in the right order so that they can be compiled, loaded, tested, etc.

lua_State *L = lua_open(); // Create a new VM state; Lua 5.0 lua_State *L = luaL_newstate(); // Create a new VM state; Lua 5.1+ int luaL_dofile(lua_State *L, const char *filename); // Run a lua script with the given filename using the specified lua_State void luaL_openlibs(lua_State *L); // Lo...

A cherry-pick takes the patch that was introduced in a commit and tries to reapply it on the branch you’re currently on. Source: Git SCM Book git cherry-pick [--edit] [-n] [-m parent-number] [-s] [-x] [--ff] [-S[key-id]] commit... git cherry-pick --continue git cherry-pick --quit git cher...

docker run [OPTIONS] IMAGE [COMMAND] [ARG...]

docker rm [OPTIONS] CONTAINER [CONTAINER...] docker attach [OPTIONS] CONTAINER docker exec [OPTIONS] CONTAINER COMMAND [ARG...] docker ps [OPTIONS] docker logs [OPTIONS] CONTAINER docker inspect [OPTIONS] CONTAINER|IMAGE [CONTAINER|IMAGE...] In the examples above, whenever container ...

docker images [OPTIONS] [REPOSITORY[:TAG]] docker inspect [OPTIONS] CONTAINER|IMAGE [CONTAINER|IMAGE...] docker pull [OPTIONS] NAME[:TAG|@DIGEST] docker rmi [OPTIONS] IMAGE [IMAGE...] docker tag [OPTIONS] IMAGE[:TAG] [REGISTRYHOST/][USERNAME/]NAME[:TAG]

Data in the world started to grow tremendously after mobile application came in the market. This huge amount of data became almost impossible to handle with traditional relational database - SQL. NoSQL databases are introduced to handle those data where much more flexibility came like variable n...

In MongoDB 3.0, MMAP (default) and WiredTiger are the stable storage engines. Usually, if your app is read-heavy, use MMAP. If its write-heavy, use WiredTiger. Your solution may also have a mixed replica set members where you can have one node configured with MMAP and another with WiredTiger. Yo...

As with other relational database systems, SQL Server exposes metadata about your databases. This is provided through the ISO Standard INFORMATION_SCHEMA schema, or the SQL Server-specific sys catalog views.

thread() thread(thread&& other) explicit thread(Function&& func, Args&&... args) ParameterDetailsotherTakes ownership of other, other doesn't own the thread anymorefuncFunction to call in a seperate threadargsArguments for func Some notes: Two std::thread obje...

resource curl_init ([ string $url = NULL ] ) bool curl_setopt ( resource $ch , int $option , mixed $value ) bool curl_setopt_array ( resource $ch, array $options ) mixed curl_exec ( resource $ch ) void curl_close ( resource $ch ) ParameterDetailscurl_init-- Initialize a cURL sessionurl...

The source code for Reachability.h and Reachability.m can be found on Apple's developer documentation site. Caveats Unlike other platforms, Apple is yet to provide a standard set of APIs to determine an iOS device's network status and offer only these code examples linked above. The source fil...

Subroutines get their arguments to magic variable called @_. While it doesn't have to be unpacked, it's recommended, as it helps readability, and prevents accidental changes as arguments of @_ are passed by reference (can be modified).