The diff output is more specific:
[I]f a whole block of text is moved, then all of it, rather than just the beginning and end, is detected as changed.
>The algorithm described here avoids these difficulties. It detects differences that correspond very closely to our intuitive notion of difference.
| // | |
| // _oo0oo_ | |
| // o8888888o | |
| // 88" . "88 | |
| // (| -_- |) | |
| // 0\ = /0 | |
| // ___/`---'\___ | |
| // .' \\| |// '. | |
| // / \\||| : |||// \ | |
| // / _||||| -:- |||||- \ |
| #!/bin/sh | |
| UNIVERSAL_OUTPUTFOLDER=${BUILD_DIR}/${CONFIGURATION}-universal | |
| # make sure the output directory exists | |
| mkdir -p "${UNIVERSAL_OUTPUTFOLDER}" | |
| # Step 1. Build Device and Simulator versions | |
| xcodebuild -target "${PROJECT_NAME}" ONLY_ACTIVE_ARCH=NO -configuration ${CONFIGURATION} -sdk iphoneos BUILD_DIR="${BUILD_DIR}" BUILD_ROOT="${BUILD_ROOT}" clean build | |
| xcodebuild -target "${PROJECT_NAME}" -configuration ${CONFIGURATION} -sdk iphonesimulator ONLY_ACTIVE_ARCH=NO BUILD_DIR="${BUILD_DIR}" BUILD_ROOT="${BUILD_ROOT}" clean build |
The libdispatch is one of the most misused API due to the way it was presented to us when it was introduced and for many years after that, and due to the confusing documentation and API. This page is a compilation of important things to know if you're going to use this library. Many references are available at the end of this document pointing to comments from Apple's very own libdispatch maintainer (Pierre Habouzit).
My take-aways are:
You should create very few, long-lived, well-defined queues. These queues should be seen as execution contexts in your program (gui, background work, ...) that benefit from executing in parallel. An important thing to note is that if these queues are all active at once, you will get as many threads running. In most apps, you probably do not need to create more than 3 or 4 queues.
Go serial first, and as you find performance bottle necks, measure why, and if concurrency helps, apply with care, always validating under system pressure. Reuse
| import Foundation | |
| import SwiftUI | |
| import UIKit | |
| extension UIBlurEffect { | |
| public static func variableBlurEffect(radius: Double, imageMask: UIImage) -> UIBlurEffect? { | |
| let methodType = (@convention(c) (AnyClass, Selector, Double, UIImage) -> UIBlurEffect).self | |
| let selectorName = ["imageMask:", "effectWithVariableBlurRadius:"].reversed().joined() | |
| let selector = NSSelectorFromString(selectorName) |
