Tutorial by Examples: pt

A try-except block may be nested inside a try-finally block. AcquireResource; try UseResource1; try UseResource2; except on E: EResourceUsageError do begin HandleResourceErrors; end; end; UseResource3; finally ReleaseResource; end; If an EResourceUsageE...

Edit your package.json to add the following script : { "scripts": { "lint": "eslint .;exit 0" } } Then run it using npm run lint We use exit 0 as a trick to gracefully terminate the script when linting fails, otherwise npm will use eslint return code an...

[SerializeField] GameObject[] gameObjects; ProsConsGreat performanceObject collection is staticPortable codeCan only refer to GameObjects from the same scene

ExampleScript script = GameObject.FindObjectOfType<ExampleScript>(); GameObject go = script.gameObject; FindObjectOfType() returns null if none is found. ProsConsStrongly typedPerformance degrades along the number of gameobjects needed to evaluatePossible to search both single objects...

Options pages are used to give the user the possibility to maintain settings for your extension. Version 2 Since Chrome 40 there is the possibility to have the option page as a predefined dialogue at chrome://extensions. The way to define an option page in the manifest.json is like the following:...

Subscripts can be used to simplify retrieving and setting elements in an array. Given the following array NSArray *fruit = @[@"Apples", @"Bananas", @"Cherries"]; This line [fruit objectAtIndex: 1]; Can be replaced by fruit[1]; They can also be used to set an...

Subscripts can also be used with NSDictionary and NSMutableDictionary. The following code: NSMutableDictionary *myDictionary = [@{@"Foo": @"Bar"} mutableCopy]; [myDictionary setObject:@"Baz" forKey:@"Foo"]; NSLog(@"%@", [myDictionary objectForKey:...

You can add subscripting to your own classes by implementing the required methods. For indexed subscripting (like arrays): - (id)objectAtIndexedSubscript:(NSUInteger)idx - (void)setObject:(id)obj atIndexedSubscript:(NSUInteger)idx For keyed subscripting (like dictionaries): - (id)objectForKey...

This will only install PHP. If you wish to serve a PHP file to the web you will also need to install a web-server such as Apache, Nginx, or use PHP's built in web-server (php version 5.4+). If you are in a Ubuntu version below 16.04 and want to use PHP 7 anyway, you can add Ondrej's PPA repo...

When one wishes to convert a list to a vector or data.frame object empty elements are typically dropped. This can be problematic which a list is created of a desired length are created with some empty values (e.g. a list with n elements is created to be added to an m x n matrix, data.frame, or data...

user_one = User.find(1) user_two = User.find(1) user_one.name = "John" user_one.save # Run at the same instance user_two.name = "Doe" user_two.save # Raises a ActiveRecord::StaleObjectError

# provision/bootstrap-controller.sh : path and shell filename from vagrantfile location config.vm.define "configcontroller" do |controller| ... controller.vm.provision :shell do |shell| shell.path = "provision/bootstrap-controller.sh" end ...

An object cannot occupy less than 1 byte, as then the members of an array of this type would have the same address. Thus sizeof(T)>=1 always holds. It's also true that a derived class cannot be smaller than any of its base classes. However, when the base class is empty, its size is not necessaril...

When you have multiple subscriptions under your Azure account; it's important that you are selecting the one you wish to operate on (and use this as default); to avoid accidents happening to resources on the wrong subscription. Classic mode Set-AzureSubscription Select-AzureSubscription Resou...

It's possible to pass Java objects to Nashorn engine to be processed in Java code. At the same time, there are some JavaScript (and Nashorn) specific constructions, and it's not always clear how they work with java objects. Below there is a table which describes behaviour of native Java objects ins...

You should always use <?php ?> tags or short-echo tags <?= ?>. Other variations (in particular, short tags <? ?>) should not be used as they are commonly disabled by system administrators. When a file is not expected to produce output (the entire file is PHP code) the closing ?&gt...

Match (node_name:node_type {}), (node_name_two:node_type_two {}) CREATE (node_name)-[::edge_name{}]->(node_name_two)

It is deemed best practice to always use Option Explicit in VBA as it forces the developer to declare all their variables before use. This has other benefits too, such as auto-capitalization for declared variable names and IntelliSense. Option Explicit Sub OptionExplicit() Dim a As Integer ...

Option Compare Binary Binary comparison makes all checks for string equality within a module/class case sensitive. Technically, with this option, string comparisons are performed using sort order of the binary representations of each character. A < B < E < Z < a < b < e < z ...

Option Base is used to declare the default lower bound of array elements. It is declared at module level and is valid only for the current module. By default (and thus if no Option Base is specified), the Base is 0. Which means that the first element of any array declared in the module has an index...