Tutorial by Examples: s

The FASTA file format is used for representing one or more nucleotide or amino acid sequences as a continuous string of characters. Sequences are annotated with a comment line, which starts with the > character, that precedes each sequence. The comment line is typically formatted in a uniform w...

A string can be written to a file with an instance of the File class. file = File.new('tmp.txt', 'w') file.write("NaNaNaNa\n") file.write('Batman!\n') file.close The File class also offers a shorthand for the new and close operations with the open method. File.open('tmp.txt', 'w') ...

You can call an instance method using the . special form: (.trim " hello ") ;;=> "hello" You can call instance methods with arguments like this: (.substring "hello" 0 2) ;;=> "he"

You can call an instance field using the .- syntax: (def p (java.awt.Point. 0 1)) (.-x p) ;;=> 0 (.-y p) ;;=> 1

You can call static methods like this: (System/currentTimeMillis) ;;=> 1469493415265 Or pass in arguments, like this: (System/setProperty "foo" "42") ;;=> nil (System/getProperty "foo") ;;=> "42"

The macro() function allows you to add new functionality to Illuminate\Support\Collection objects Usage: Collection::macro("macro_name", function ($parameters) { // Your macro }); For example: Collection::macro('uppercase', function () { return $this->map(function ($i...

Also known as triple equals. This operator does not test equality, but rather tests if the right operand has an IS A relationship with the left operand. As such, the popular name case equality operator is misleading. This SO answer describes it thus: the best way to describe a === b is "if I ...

Goto https://atom.io/ and install the atom editor. Then install some Atom packages for easier Titanium coding: NameTypeFeaturestitanium language javascriptLanguageJS Autocomplete (non alloy)Titanium Alloyadd-onAll-in-one packageJump to definitionOpen relatedTSS HighlightTi-Createadd-onCreate proje...

We are just creating an empty Alloy app using CLI and Atom. Open a new terminal and add the following: ti create --id com.test -d . -n APPNAME -p all -t app -u http://migaweb.de cd APPNAME/ alloy new This will create a basic app (name: APPNAME, bundle identifier: com.test, type: app, platform...

The standard input. The default value for $stdin

The standard output. The default value for $stdout

The standard error output. The default value for $stderr

The current standard error output.

The current standard output

The current standard input

Modules can contain other modules and classes: module Namespace module Child class Foo; end end # module Child # Foo can now be accessed as: # Child::Foo end # module Namespace # Foo must now be accessed as: # Namespace::Child::Foo

To create a gemset we need to create a .rvmrc file. Syntax: $ rvm --rvmrc --create <ruby-version>@<gemsetname> Example: $ rvm --rvmrc --create ruby-2.2.2@myblog The above line will create a .rvmrc file in the root directory of the app. To get the list of available gemsets, us...

The permutation method, when called with a block yields a two dimensional array consisting of all ordered sequences of a collection of numbers. If this method is called without a block, it will return an enumerator. To convert to an array, call the to_a method. ExampleResult[1,2,3].permutation#&lt...

DatabaseTransactions trait allows databases to rollback all the change during the tests. If you want to rollback multiple databases , you need to set $connectionsToTransact properties use Illuminate\Foundation\Testing\DatabaseMigrations; class ExampleTest extends TestCase { use Databas...

let configuration = WKWebViewConfiguration() if let path = NSBundle.mainBundle().pathForResource("customUserScript", ofType: "js"), source = try? NSString(contentsOfFile: path, encoding: NSUTF8StringEncoding) as String { let userScript = WKUserScript(source...