Tutorial by Examples: od

Overview In order to debug Java classes that are called during MATLAB execution, it is necessary to perform two steps: Run MATLAB in JVM debugging mode. Attach a Java debugger to the MATLAB process. When MATLAB is started in JVM debugging mode, the following message appears in the command wi...

Change Index Initialize or update a particular element in the array array[10]="elevenths element" # because it's starting with 0 3.1 Append Modify array, adding elements to the end if no subscript is specified. array+=('fourth element' 'fifth element') Replace the entire ar...

You can use traits to modify methods of a class, using traits in stackable fashion. The following example shows how traits can be stacked. The ordering of the traits are important. Using different order of traits, different behavior is achieved. class Ball { def roll(ball : String) = println(&q...

With IronPython you can access any .net assembly which is compiled using the same or a lower version than the IronPython core. Example: Importing a a .net assembly and class from System import Math Example: Using an imported class: from System import Math print Math.Abs(-123) You can also lo...

Classes have 3 types of methods: instance, singleton and class methods. Instance Methods These are methods that can be called from an instance of the class. class Thing def somemethod puts "something" end end foo = Thing.new # create an instance of the class foo.somemeth...

class Animal def method_missing(method, *args, &block) "Cannot call #{method} on Animal" end end => Animal.new.say_moo > "Cannot call say_moo on Animal"

class Animal def method_missing(method, *args, &block) say, speak = method.to_s.split("_") if say == "say" speak else super end end end => a = Animal.new => a.say_moo => "moo" => a.shout_moo => NoMethodE...

CommandDescriptionaAppend text following current cursor positionAAppend text at the end of current lineiInsert text before the current cursor positionIInsert text before first non-blank character of current linegIInsert text in first column of cursor linegiInsert text at same position where it was l...

Say you want to perform in action (in this case, logging "Foo"), while doing something else (logging "Bar"). Normally, if you don't use concurrency, one of these actions is going to be fully executed, and the other run will run only after it's completely finished. But with concur...

./mongo localhost:27017/mydb myjsfile.js Explanation: This operation executes the myjsfile.js script in a mongo shell that connects to the mydb database on the mongod instance accessible via the localhost interface on port 27017. localhost:27017 is not mandatory as this is the default port mongo...

$sku = 'sku-goes-here'; $product = Mage::getModel('catalog/product')->loadByAttribute('sku', $sku);

$id = 1; $product = Mage::getModel('catalog/product')->load($id); if($product->getId()){ //product was found }

$collection = Mage::getModel('catalog/product')->getCollection(); $collection->addAttributeToFilter('sku', array('like' => 'UX%'));

$collection = Mage::getModel('catalog/product')->getCollection(); // Using operator $collection->addAttributeToFilter('status', array('eq' => 1)); // Without operator (automatically uses 'equal' operator $collection->addAttributeToFilter('status', 1);

You can create a new hash with the keys or values modified, indeed you can also add or delete keys, using inject (AKA, reduce). For example to produce a hash with stringified keys and upper case values: fruit = { name: 'apple', color: 'green', shape: 'round' } # => {:name=>"apple",...

Run-length encoding captures the lengths of runs of consecutive elements in a vector. Consider an example vector: dat <- c(1, 2, 2, 2, 3, 1, 4, 4, 1, 1) The rle function extracts each run and its length: r <- rle(dat) r # Run Length Encoding # lengths: int [1:6] 1 3 1 1 2 2 # valu...

Module is a collection of type declarations, data declarations and procedures. The basic syntax is: module module_name use other_module_being_used ! The use of implicit none here will set it for the scope of the module. ! Therefore, it is not required (although considered good practice...

You may wish to use Model Factories within your seeds. This will create 3 new users. use App\Models\User; class UserTableSeeder extends Illuminate\Database\Seeder{ public function run(){ factory(User::class)->times(3)->create(); } } You may also want to define ...

Artisan is a utility that can help you do specific repetitive tasks with bash commands. It covers many tasks, including: working with database migrations and seeding, clearing cache, creating necessary files for Authentication setup, making new controllers, models, event classes, and a lot more. ...

class Person { [string] $FirstName [string] $LastName [string] Greeting() { return "Greetings, {0} {1}!" -f $this.FirstName, $this.LastName } } $x = [Person]::new() $x.FirstName = "Jane" $x.LastName = "Doe" $greeting = $x.Greeting() #...