Tutorial by Examples: t

The following examples will use this class hierarchy: struct A { int m; }; struct B : A {}; struct C : B {}; The conversion from derived class type to base class type is preferred to user-defined conversions. This applies when passing by value or by reference, as well as when converting pointe...

To create a simple variable and assign it to a value or string use the SET command: SET var=10 Here, the code declares a new variable var with a value of 10. By default all variables are stored internally as strings; this means that the value 10 is no different to foo1234 or Hello, World! Notes...

Warning: The functions atoi, atol, atoll and atof are inherently unsafe, because: If the value of the result cannot be represented, the behavior is undefined. (7.20.1p1) #include <stdio.h> #include <stdlib.h> int main(int argc, char** argv) { int val; if (argc < 2) ...

The contents of files and network messages may represent encoded characters. They often need to be converted to unicode for proper display. In Python 2, you may need to convert str data to Unicode characters. The default ('', "", etc.) is an ASCII string, with any values outside of ASCII ...

Before we start... In terms of application layers your ViewModel is a class containing all the business logic and rules making the app do what it should according to the requirements. It's also important to make it as much independent as possible reducing references to UI, data layer, native featur...

UI testing tools Two main tools that are nowadays mostly used for UI testing are Appium and Espresso. AppiumEspressoblackbox testwhite/gray box testingwhat you see is what you can testcan change inner workings of the app and prepare it for testing, e.g. save some data to database or sharedpreferen...

ABAP offers three different operators for declaring string- or char-like-variables SymbolsInternal TypeLengthName'...'C1-255 Charstext field literals`...`CString0-255 Charstext string literals|...|CString0-255 Charstemplate literals Note that the length-range only applies to hard coded values. Int...

From Autohotkey Site Documentation Go to the AutoHotkey Homepage. Click Download, once downloaded run the executable. During installation of AutoHotkey, you will be asked to choose from UNICODE or ANSI. In short, you would probably want to choose UNICODE. It has support for non-English letters ...

Assignment arguments appear at the end of an awk invocation, in the same area as file variables, both -v assignments and argument assignments must match the following regular expression. (assuming a POSIX locale) ^[[:alpha:]_][[:alnum:]_]*= The following example assumes a file file containing th...

This command: :s/foo/bar/g substitutes each occurrence of foo with bar on the current line. fool around with a foodie becomes barl around with a bardie If you leave off the last /g, it will only replace the first occurence on the line. For example, :s/foo/bar On the previous line wou...

Add 'exception' as a suffix Custom exception names should be suffixed with "-Exception". Below are correctly named exceptions: public class MyCustomException : Exception public class FooException : Exception

$ jekyll build # The current site folder will be built into the ./_site directory $ jekyll build --destination /var/www/ # The current site folder will be generated into /var/www/ $ jekyll build --watch # The current site folder will be built into the ./_site directory and will be kept up t...

This will trigger the native email client for sharing text. Parameters : Email To address, Subject, Body. Code Sample : you can call the function wherever you need, (mostly inside click listeners) like below Calling function shareEmail("sample@gmail.com", "Email sharing example&q...

The easiest way to use Processing is by downloading the Processing editor from the Processing download page. That comes as a zip file. Unzip that file anywhere, and you'll have a directory that contains an executable (on Windows, that's processing.exe). Running that executable opens up the Process...

Use a HashMap to store the parameters that should be sent to the server through POST parameters: HashMap<String, String> params; Once the params HashMap is populated, create the StringBuilder that will be used to send them to the server: StringBuilder sbParams = new StringBuilder(); ...

VBA is compiled in run-time, which has a huge negative impact on it's performance, everything built-in will be faster, try to use them. As an example I'm comparing SUM and COUNTIF functions, but you can use if for anything you can solve with WorkSheetFunctions. A first attempt for those would be t...

This example shows how to mock out a function call that is irrelevant to our unit test, and then use the defer statement to re-assign the mocked function call back to its original function. var validate = validateDTD // ParseXML parses b for XML elements and values, and returns them as a map of ...

In this example we create a goroutine (a function running in a separate thread) that accepts a chan parameter, and simply loops, sending information into the channel each time. In the main we have a for loop and a select. The select will block processing until one of the case statements becomes tru...

So here, I have removed the for loops, and made a timeout by adding a second case to the select that returns after 3 seconds. Because the select just waits until ANY case is true, the second case fires, and then our script ends, and chatter() never even gets a chance to finish. // Use of the select...

Subroutine arguments in Perl are passed by reference, unless they are in the signature. This means that the members of the @_ array inside the sub are just aliases to the actual arguments. In the following example, $text in the main program is left modified after the subroutine call because $_[0] in...