Tutorial by Examples: ti

User-defined method objects may be created when getting an attribute of a class (perhaps via an instance of that class), if that attribute is a user-defined function object, an unbound user-defined method object, or a class method object. class A(object): # func: A user-defined function object...

ggplot(data = diamonds, aes(x = cut, fill =color)) + geom_bar(stat = "count", position = "dodge") it is possible to obtain an horizontal bar chart simply adding coord_flip() aesthetic to the ggplot object: ggplot(data = diamonds, aes(x = cut, fill =color)) + geom_ba...

If you are unsure which rules to list in your .gitignore file, or you just want to add generally accepted exceptions to your project, you can choose or generate a .gitignore file: https://www.toptal.com/developers/gitignore https://github.com/github/gitignore Many hosting services such as Git...

Start a Script Block as background job: $job = Start-Job -ScriptBlock {Get-Process} Start a script as background job: $job = Start-Job -FilePath "C:\YourFolder\Script.ps1" Start a job using Invoke-Command on a remote machine: $job = Invoke-Command -ComputerName "ComputerName&...

async.parallel(tasks, afterTasksCallback) will execute a set of tasks in parallel and wait the end of all tasks (reported by the call of callback function). When tasks are finished, async call the main callback with all errors and all results of tasks. function shortTimeFunction(callback) { set...

extern int var; static int var; /* Undefined behaviour */ C11, §6.2.2, 7 says: If, within a translation unit, the same identifier appears with both internal and external linkage, the behavior is undefined. Note that if an prior declaration of an identifier is visible then it'll have the pri...

Use the yum command to manage packages in Enterprise Linux-based operating systems: yum install php This installs a minimal install of PHP including some common features. If you need additional modules, you will need to install them separately. Once again, you can use yum to search for these pac...

Note: There will be some Objective-c in this example.. We will make a wrapper to C++ in this example, So don't worry to much about it. First start Xcode and create a project. And select a Cocoa application Delete all sources except the Info.plist file.(Your app won't work without it) Creat...

You can use the header() function to instruct the browser to redirect to a different URL: $url = 'https://example.org/foo/bar'; if (!headers_sent()) { // check headers - you can not send headers if they already sent header('Location: ' . $url); exit; // protects from code being executed afte...

Customizing the Shell prompt Default command prompt can be changed to look different and short. In case the current directory is long default command prompt becomes too large. Using PS1 becomes useful in these cases. A short and customized command pretty and elegant. In the table below PS1 has be...

Improper Inheritance Lets say there are 2 classes class Foo and Bar. Foo has two features Do1 and Do2. Bar needs to use Do1 from Foo, but it doesn't need Do2 or needs feature that is equivalent to Do2 but does something completely different. Bad way: make Do2() on Foo virtual then override it in B...

One of Angular's strength's is client-side form validation. Dealing with traditional form inputs and having to use interrogative jQuery-style processing can be time-consuming and finicky. Angular allows you to produce professional interactive forms relatively easily. The ng-model directive provide...

The echo setting determines whether command echoing is on or off. This is what a sample program looks like with command echoing on (default): C:\Windows\System32>echo Hello, World! Hello, World! C:\Windows\System32>where explorer C:\Windows\System32\explorer.exe C:\Windows\System32&gt...

Sometimes you may need additional features from a directive. Instead of rewriting (copy) the directive, you can modify how the directive behaves. The decorator will be executed during $inject phase. To do so, provde a .config to your module. The directive is called myDirective, so you have to con...

Angular js directives can be nested or be made interoperable. In this example, directive Adir exposes to directive Bdir it's controller $scope, since Bdir requires Adir. angular.module('myApp',[]).directive('Adir', function () { return { restrict: 'AE', controlle...

install the required Microsoft.SqlServer.Types assembly; they are not installed by default, and are available from Microsoft here as "Microsoft® System CLR Types for Microsoft® SQL Server® 2012" - note that there are separate installers for x86 and x64. install Dapper.EntityFramew...

When using Access you can retrieve data using queries. These queries are built using Structured Query Language (SQL). Understanding SQL is important because it can help build better, more useful queries. When creating queries in Access, you can switch to "SQL View". An example of a "...

The BOM (Browser Object Model) contains objects that represent the current browser window and components; objects that model things like history, device's screen, etc The topmost object in BOM is the window object, which represents the current browser window or tab. Document: represents current...

An awk consists of patterns and actions, enclosed in curly brackets, to be taken if a pattern matches. The most basic pattern is the empty pattern, which matches any record. The most basic action is the empty action, which is equivalent to { print }, which is, in turn, equivalent to { print $0 }. If...

<PropertyGroup> <!-- Definition of a Property named "TestCondition". A PropertyGroup may also be placed inside a Target. --> <TestCondition>True</TestCondition> </PropertyGroup> <!-- This Target will run after the "Clean" Target, su...