saetia

OS X Preferences

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most of these require logout/restart to take effect

# Enable character repeat on keydown
defaults write -g ApplePressAndHoldEnabled -bool false

# Set a shorter Delay until key repeat

markd2

#import <Foundation/Foundation.h>

@interface BNRDiggyDict : NSObject

// React to object indexing.  Would be nice to have a @protocol for this
- (id) objectForKeyedSubscript: (id) key;
- (void) setObject: (id) thing  forKeyedSubscript: (id<NSCopying>) key;

// And for fun, it also can react to scalar indexing.
// Returns the N'th key of the top-level collection.

lxcid

typedef void (^LXSResumeBlock)(void);
typedef void (^LXSRunLoopBlock)(LXSResumeBlock resume);
// Call resume() to stop the block from exercising the run loop and break out of the loop/block.
// Failure to call resume() will cause the test to hang indefinitely.
// This is useful to testing asynchronous actions like AFNetworking operations. See https://gist.github.com/2215212
// With some reference from https://github.com/icanzilb/MTTestSemaphore, I was able to simplify this method.
inline void LXS_exercisesRunLoopInBlock(LXSRunLoopBlock block) {
    __block BOOL keepRunning = YES;
    block(^{ keepRunning = NO; });
    while (keepRunning && [[NSRunLoop currentRunLoop] runMode:NSDefaultRunLoopMode beforeDate:[NSDate dateWithTimeIntervalSinceNow:0.03]]) {

TimMedcalf

/*

One of the first things someone new to iOS Development finds is that dealing with the keyboard is trickier
than they think it should be. Simply changing the scrolling extents of a UITableView (or UIScrollView, or 
UICollectionView) that is partially covered by they keyboard reveals a lot about the internals of how iOS
works and highlights various "gotchas" that need to be considered.

There are various ways to know that a keyboard has been shown - but observing some specific notifications
provides a reliable way to allow you to modify your views to deal with it.

jmont

// Swift Monads -- Maybe
// Juan C. Montemayor (@norsemelon)

// This operator can be used to chain Optional types like so:
// optionalVal >>= f1 >>= f2
// where f1 and f2 have type `Any -> Any?`
//
// If a value is ever nil, the chain short-circuits and will result in nil.
// This is a much neater way to do this than using the if syntax specified in
// the Swift iBook.

fjcaetano

var randomNumbers = [42, 12, 88, 62, 63, 56, 1, 77, 88, 97, 97, 20, 45, 91, 62, 2, 15, 31, 59, 5]

func partition(v: Int[], left: Int, right: Int) -> Int {
    var i = left
    for j in (left + 1)..(right + 1) {
        if v[j] < v[left] {
            i += 1
            (v[i], v[j]) = (v[j], v[i])
        }
    }

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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erica

import Foundation
#if os(Linux)
    import Glibc
#endif

struct Random {
    #if os(Linux)
    static var initialized = false
    #endif
    

vmanot

extension UIApplication {
    /// The top most view controller
    static var topMostViewController: UIViewController? {
        return UIApplication.shared.keyWindow?.rootViewController?.visibleViewController
    }
}

extension UIViewController {
    /// The visible view controller from a given view controller
    var visibleViewController: UIViewController? {

ryanashcraft

import Combine
import SwiftUI

struct DetailView: View {
    var onDismiss: () -> Void
    
    var body: some View {
        Button(
            "Here are details. Tap to go back.",
            action: self.onDismiss