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The name "Grand Central Dispatch" is a reference to Grand Central Terminal. [citation needed] The source code for the library that provides the implementation of GCD's services, libdispatch, was released by Apple under the Apache License on September 10, 2009. [3] It has been ported [4] to FreeBSD 8.1+, [5] MidnightBSD 0.3+, [6] Linux, and Solaris.
In Swift, references to objects are strong, unless they are declared weak or unowned. Swift requires explicit handling of nil with the Optional type: a value type that can either have a value or be nil. An Optional type must be handled by "unwrapping" it with a conditional statement, allowing safe usage of the value, if present. Conversely, any ...
These include a "swift-corelibs-foundation" to stand in for the Foundation Kit, a "swift-corelibs-libdispatch" to stand in for the Grand Central Dispatch, and an "swift-corelibs-xctest" to stand in for the XCTest APIs from Xcode. [99] As of 2019, with Xcode 11, Apple has also added a major new UI paradigm called SwiftUI.
Apple designed blocks with the explicit goal of making it easier to write programs for the Grand Central Dispatch threading architecture, [3] [4] although it is independent of that architecture and can be used in much the same way as closures in other languages.
Apple is also releasing APIs for Grand Central Dispatch for developers to use in their applications and also to analyze specific blocks of code running on Grand Central Dispatch. [51] A new C and Objective-C language feature named "Blocks" facilitates creation of code that will easily optimize to take advantage of Grand Central Dispatch. [52 ...
Stacy Revere/Getty Images Taylor Swift may have a nickname for Travis Kelce — and Swifties can’t get enough of it. As the Kansas City Chiefs faced off against the Green Bay Packers in ...
Additionally, Apple provides support in Xcode for editing property lists in a hierarchical viewer/editor that can handle plists formatted in binary or XML, but not JSON. As of Mac OS X 10.4 , Apple provides an AppleScript interface for reading property list files through the System Events application.
Swift, 34, and Ye, 47, have a long-running and well documented public feud. Kanye "Ye" West and Taylor Swift on good terms at the the 57th annual GRAMMY Awards on Feb. 8, 2015. Kevin Mazur/WireImage