mdznr’s gists

mdznr / Swift Assertion Cheat Sheet.md

Last active February 16, 2022 23:31

Compares the different behaviors of the various assertion functions in Swift

function	debug	release	release
Optimization Level	`-Onone`	`-O`	`-Ounchecked`
`assert()`	YES	NO	NO
`assertionFailure()`	YES	NO	NO^**
`precondition()`	YES	YES	NO
`preconditionFailure()`	YES	YES	YES^**
`fatalError()`^*	YES	YES	YES

| Value | Meaning |

mdznr / defaults delete regular expression

Created August 25, 2020 19:03

Easily delete all user defaults matching a given format

defaults read <domain> | grep -o --regexp="\"NSWindow Frame [^\"]*\"" | xargs -L1 defaults delete <domain>

mdznr / Alignment

Last active August 29, 2015 14:02

How do you best align function calls on multiple lines?

	// In Objective-C, a relatively long method call could be easily wrapped on multiple lines:

	[attributedString addAttribute:NSParagraphStyleAttributeName
	value:paragraphStyle
	range:NSMakeRange(0, attributedString.length)];


	// But how do you do that in Swift?

	attributedString.addAttribute(NSParagraphStyleAttributeName, value: paragraphStyle, range: NSRange(location: 0, length: attributedString.length))

mdznr / Switch

Last active August 29, 2015 14:02

The way switch statements work is different in Swift than in other languages, like C.

	var total : Int
	let myString = "foo"

	// When originally looking at Swift's switch statements, you may think this is how you get fall through behaviour:
	total = 0
	switch myString {
	case "foo":
	total += 4
	case "foo", "bar":
	total += 2

mdznr / UIAppearance.m

Created May 31, 2014 22:02

An example of how to customize the appearance of `UIBarButtonItem` for @manolosavi

	[[UIBarButtonItem appearance] setBackButtonBackgroundImage:[[UIImage imageNamed:@"IMG"] resizableImageWithCapInsets:UIEdgeInsetsMake(4, 4, 4, 4)]
	forState:UIControlStateNormal
	barMetrics:UIBarMetricsDefault];

	[[UIBarButtonItem appearance] setTitleTextAttributes:@{NSFontAttributeName: [UIFont fontWithName:@"Courier" size:16],
	NSForegroundColorAttributeName: [UIColor redColor]}
	forState:UIControlStateNormal];

mdznr / UIColor Creation

Created May 21, 2014 19:38

Is there a speed difference between [UIColor colorWithRed:green:blue:alpha:] and [UIColor colorWithHue:saturation:brightness:alpha:]?

mdznr / Program Loader

Last active August 29, 2015 14:00

Loading program...

	#include <stdio.h>
	#include <stdlib.h>
	#include <unistd.h>

	#define main main() { printf("Loading program..."); unsigned int i=1; while (1) { sleep(i++); printf("."); fflush(stdout); } } int nope

	int main()
	{
	printf("Hello, World!\n");
	return EXIT_SUCCESS;

mdznr / Nope

Last active August 29, 2015 14:00

"Why won't my program work!?"

	#include <stdio.h>
	#include <stdlib.h>

	#define main main(){ return EXIT_SUCCESS; } int nope

	int main()
	{
	printf("Hello, World!\n");
	return EXIT_SUCCESS;
	}

mdznr / LOL

Created April 21, 2014 04:47

Please don't.

	#include <stdio.h>

	#define MAIN int main(int argc, const char * argv[]) { printf("Hello, World!\n"); return 0; }

	MAIN

mdznr / UIViewAutoresizing Additions

Created April 20, 2014 23:54

Some quick additions to UIViewAutoresizing to make creating flexible dimensions and flexible margins easier.

	#define UIViewAutoresizingFlexibleDimensions (UIViewAutoresizingFlexibleWidth \| UIViewAutoresizingFlexibleHeight)
	#define UIViewAutoresizingFlexibleMargins (UIViewAutoresizingFlexibleTopMargin \| UIViewAutoresizingFlexibleBottomMargin \| UIViewAutoresizingFlexibleLeftMargin \| UIViewAutoresizingFlexibleRightMargin)

Matt Zanchelli mdznr