Tutorial by Topics: es

If you do not want your code to break when no implementation is found, check the DependencyService first if it has a implementation available. You can do this by a simple check if it is not null. var speaker = DependencyService.Get<ITextToSpeech>(); if (speaker != null) { speaker....

Java allows the retrieval of file-based resources stored inside of a JAR alongside compiled classes. This topic focuses on loading those resources and making them available to your code. A resource is file-like data with a path-like name, which resides in the classpath. The most common use of...

[[local] mt = ]getmetatable(t) --> retrieve associated metatable for 't' [[local] t = ]setmetatable(t, mt) --> set the metatable for 't' to 'mt' and returns 't' ParameterDetailstVariable referring to a lua table; can also be a table literal.mtTable to use as a metatable; can have ze...

<type>[] <name>; Slices generate a new view on existing memory. They don't create a new copy. If no slice holds a reference to that memory anymore - or a sliced part of it - it will be freed by the garbage collector. Using slices it's possible to write very efficient code for e...

#include <windows.h> BOOL WINAPI DestroyWindow(HWND hwnd); VOID WINAPI PostQuitMessage(int exitcode); BOOL WINAPI MoveWindow(HWND hwnd, int x, int y, int cx, int cy, BOOL bRepaint);

NSRegularExpression *regex = [NSRegularExpression regularExpressionWithPattern:PATTERN options:OPTIONS error:ERROR]; NSArray<NSTextCheckingResult *> *results = [regex matchesInString:STRING options:OPTIONS range:RANGE_IN_STRING]; NSInteger numberOfMatches = [regex numberOfMatchesInString:S...

The Open University (1999) Relational Database Systems: Block 2 Relational Theory, Milton Keynes, The Open University.

mod modname; // Search for the module in modname.rs or modname/mod.rs in the same directory mod modname { block }

Browser security prevents a web page from making AJAX requests to another domain. This restriction is called the same-origin policy, and prevents a malicious site from reading sensitive data from another site. However, sometimes you might want to let other sites make cross-origin requests to your ...

DECLARE @VariableName DataType [ = Value ] ; SET @VariableName = Value ;

In HTTP, status codes are a machine-readable mechanism indicating the result of a previously issued request. From RFC 7231, sec. 6: "The status-code element is a three-digit integer code giving the result of the attempt to understand and satisfy the request." The formal grammar allows cod...