Tutorial by Examples: b

Jumps out of the nearest enclosing loop or switch statement. // print the numbers to a file, one per line for (const int num : num_list) { errno = 0; fprintf(file, "%d\n", num); if (errno == ENOSPC) { fprintf(stderr, "no space left on device; output will be t...

List subList(int fromIndex, int toIndex) Here fromIndex is inclusive and toIndex is exclusive. List list = new ArrayList(); List list1 = list.subList(fromIndex,toIndex); If the list doesn't exist in the give range, it throws IndexOutofBoundException. What ever changes made on the list1 wi...

So your query has failed (see MySQLi connect for how we made $conn) $result = $conn->query('SELECT * FROM non_existent_table'); // This query will fail How do we find out what happened? $result is false so that's no help. Thankfully the connect $conn can tell us what MySQL told us about the f...

Custom validation attributes can be created by deriving from the ValidationAttribute base class, then overriding virtual methods as needed. [AttributeUsage(AttributeTargets.Property, AllowMultiple = false, Inherited = false)] public class NotABananaAttribute : ValidationAttribute { public ov...

An easing causes some variable to change unevenly over a duration. "variable" must be able to be expressed as a number, and can represent a remarkable variety of things: an X-coordinate, a rectangle's width, an angle of rotation, the red component of an R,G,B color. anything that c...

Arrays are zero-based, that is the index always starts at 0 and ends with index array length minus 1. Thus the following code will not output the first element of the array and will output garbage for the final value that it prints. #include <stdio.h> int main(void) { int x = 0; ...

Less doesn't put any restrictions on the number of times the parent selector (&) can be used in a complex selector and so, we can use it more than once like in the below examples to select sibling elements without the need to repeat the selector. .demo { border: 1px solid black; /* add borde...

The following snippet replaces all Attributes called PreviousAttribute by an Attribute called ReplacementAttribute for an entire solution. The sample manually searches the Syntax tree and replaces all affected nodes. static async Task<bool> ModifySolution(string solutionPath) { ...

The following snippet replaces all Attributes called "PreviousAttribute" by an Attribute called "ReplacementAttribute" for an entire solution. The sample manually uses a SyntaxRewriter to exchange the attributes. /// <summary> /// The CSharpSyntaxRewriter allows to rewrit...

Sometimes a poorly designed 3rd-party library will write unwanted diagnostics to System.out or System.err streams. The recommended solutions to this would be to either find a better library or (in the case of open source) fix the problem and contribute a patch to the developers. If the above solu...

The specification says: A byte range digest shall be computed over a range of bytes in the file, that shall be indicated by the ByteRange entry in the signature dictionary. This range should be the entire file, including the signature dictionary but excluding the signature value itself (the Conte...

page.xml <Page xmlns="http://schemas.nativescript.org/tns.xsd" navigatingTo="navigatingTo"> <Repeater items="{{ myItems }}"> <Repeater.itemTemplate> <Label text="{{ title || 'Downloading...' }}" textWrap="true&quot...

page.xml <Page xmlns="http://schemas.nativescript.org/tns.xsd" navigatingTo="navigatingTo"> <ListView items="{{ myItems }}" itemTap="listViewItemTap"> <ListView.itemTemplate> <Label text="{{ title || 'Downloading.....

Examples of using functions with hotkeys: Hotkey, a, MyFunction ; Calls MyFunction() when a is pressed MyFunction() { MsgBox You pressed %A_ThisHotkey%. } Or: a::MyFunction() MyFunction() { MsgBox You pressed %A_ThisHotkey%. }

I'll demonstrate the basic usage of using functions vs using labels+gosub. In this example we'll implement simple functionality to add two numbers and store them in a variable. With functions: c := Add(3, 2) ; function call MsgBox, Result: %c% Add(a, b) { ; This is a function. Put it wherever...

The following code is taken from he official AutoHotkey documentation: Function implementation: #Persistent OnClipboardChange("ClipChanged") return ClipChanged(Type) { ToolTip Clipboard data type: %Type% Sleep 1000 ToolTip ; Turn off the tip. } Label implementati...

This script demonstrates how to receive complicated GUI events from different controls in the same event callback function. We'll be using two ListView controls for that. Now every time an action is detected on one of those ListView controls, we want a precise description of what happened and have ...

If your package isn't only a library, but has a piece of code that can be used either as a showcase or a standalone application when your package is installed, put that piece of code into __main__.py file. Put the __main__.py in the package_name folder. This way you will be able to run it directly ...

Some people recommend that you should apply various tests to a file before attempting to open it either to provide better diagnostics or avoid dealing with exceptions. For example, this method attempts to check if path corresponds to a readable file: public static File getValidatedFile(String path...

It is possible that the client browser does not support Javascript or have Javascript execution disabled, perhaps due to security reasons. To be able to tell users that a script is supposed to execute in the page, the <noscript> tag can be used. The content of <noscript> is displayed whe...