Tutorial by Examples: ce

You might have heard that everything in Python is an object, even literals. This means, for example, 7 is an object as well, which means it has attributes. For example, one of these attributes is the bit_length. It returns the amount of bits needed to represent the value it is called upon. x = 7 ...

A common problem when working with Unity is when 2 or more developers are modifying a Unity scene or prefab (*.unity files). Git does not know how to merge them correctly out of the box. Thankfully the Unity team deployed a tool called SmartMerge which makes simple merge automatic. The first thing...

A source code file is a (generally) plain text file which is to processed by the compiler. A source code file may contain up to one main program and any number of modules and external subprograms. For example, a source code file may contain the following module mod1 end module mod1 module mod...

/*(8)*/ SELECT /*9*/ DISTINCT /*11*/ TOP /*(1)*/ FROM /*(3)*/ JOIN /*(2)*/ ON /*(4)*/ WHERE /*(5)*/ GROUP BY /*(6)*/ WITH {CUBE | ROLLUP} /*(7)*/ HAVING /*(10)*/ ORDER BY /*(11)*/ LIMIT The order in which a query is processed and description of each section. V...

array_reduce reduces array into a single value. Basically, The array_reduce will go through every item with the result from last iteration and produce new value to the next iteration. Usage: array_reduce ($array, function($carry, $item){...}, $defaul_value_of_first_carry) $carry is the result f...

GitHub helps you quickly add a license to your repository, as an alternative for adding your own text/markdown file. In your repository, click 'Create new file' On next page: Type LICENSE.md or LICENSE.txt as the new file's file name. The Want to use a new template? dialog will appea...

Microsoft Access is an Application Generator for developing databases and data-driven applications, primarily for local use. Microsoft Access consists of two main elements: A Relational Database Management System (RDBMS) that combines the Microsoft Jet Database Engine (Access 2003 and earler) or ...

Emacs's user interface uses terms that were coined early and can be unsettling to users used to a more modern terminology. Frame In Emacs, what is otherwise called a window (the area of the display used by a program) is called a frame. Emacs starts using one frame, though additional frames may b...

Characters can be escaped using character references, in element content or attribute values. Their Unicode codepoint can be specified in decimal or hex. <?xml version="1.0"?> <document> The line feed character can be escaped with a decimal (
) or hex (
) ...

perl -pe"s/foo/bar/g" file.txt Or in-place: perl -i -pe's/foo/bar/g' file.txt On Windows: perl -i.bak -pe"s/foo/bar/g" file.txt

perl -lane'print "$F[0] $F[-1]"' data.txt # prints the first and the last fields of a space delimited record CSV example: perl -F, -lane'print "$F[0] $F[-1]"' data.csv

Without a backup copy (not supported on Windows) perl -i -pe's/foo/bar/g' file.txt With a backup copy file.txt.bak perl -i.bak -pe's/foo/bar/g' file.txt With a backup copy old_file.txt.orig in the backup subdirectory (provided the latter exists): perl -i'backup/old_*.orig' -pe's/foo/bar/g' ...

genRandom creates a stream of random numbers that has a one in four chance of terminating each time it's called. def genRandom: Stream[String] = { val random = scala.util.Random.nextFloat() println(s"Random value is: $random") if (random < 0.25) { Stream.empty[String] ...

curl 'www.example.com:9200/_cat/indices?v' output: health status index pri rep docs.count docs.deleted store.size pri.store.size green open logstash-2016.07.21 5 1 4760 0 4.8mb 2.4mb green open logstash-2016.07.20 5 1 7232 ...

If your application is going to run on different devices, it's going to need to render to different ViewPorts, based on the device size. You can deal with this in two ways: with javascript rules, or CSS media styles. If you've been using a MVC or MVVM library, such as Angular or Ember (or Blaze, for...

On desktop apps, you may want to disable scroll-bounce, to give your app a more native feel. You can do this with javascript, by disabling how the browser controls the DOM: // prevent scrolling on the whole page // this is not meteorish; TODO: translate to meteor-centric code document.ontouchmove...

Make sure your development workstation and iPhone are connected to the same WiFi network. Tethering, hotspots, and other ad-hoc networking won't work. Run sudo meteor run ios-device Deploy to your device!

This command will create a /dump directory, and store each collection in a separate BSON blob file. This is the best way to backup or transfer databases between systems. mongodump --db meteor

Did you know about the --url flag? Very handy. meteor mongo --url YOURSITE.meteor.com

They're not easily accessible. If you run the 'meteor bundle' command, you can generate a tar.gz file, and then run your app manually. Doing that, you should be able to access the mongo logs... probably in the .meteor/db directory. If you really need to access mongodb log files, set up a regular mo...