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@mattt
mattt / UTTypeForImageData.m
Created March 27, 2014 23:19
A quick function for determining an image's file type by its first couple of bytes
@import MobileCoreServices;
static CFStringRef UTTypeForImageData(NSData *data) {
const unsigned char * bytes = [data bytes];
if (data.length >= 8) {
if (bytes[0] == 0x89 && bytes[1] == 0x50 && bytes[2] == 0x4E && bytes[3] == 0x47 && bytes[4] == 0x0D && bytes[5] == 0x0A && bytes[6] == 0x1A && bytes[7] == 0x0A) {
return kUTTypePNG;
}
}
@th0ma5w
th0ma5w / easing.py
Created March 31, 2014 01:32
Easing Equations in Python (orig by Robert Penner)
# ported from http://www.gizma.com/easing/
# by http://th0ma5w.github.io
#
# untested :P
import math
linearTween = lambda t, b, c, d : c*t/d + b
@qnoid
qnoid / SuperclassCallsOverridableMethod.playground
Last active August 9, 2017 11:43
Swift ensures that all properties of a derived class are initialised before calling its base class. The compiler will generate a warning. Just move the statement below the assignment to remove the warning. Compared to Java, this is safe. See: http://stackoverflow.com/questions/3404301/whats-wrong-with-overridable-method-calls-in-constructors
import Cocoa
class Plane
{
init()
{
readyToTakeOff();
}
func readyToTakeOff(){
@jpsim
jpsim / JAZMusician.h
Created July 7, 2014 09:25
SourceKit Playground
//
// JAZMusician.h
// JazzyApp
//
#import <Foundation/Foundation.h>
/**
JAZMusician models, you guessed it... Jazz Musicians!
From Ellington to Marsalis, this class has you covered.
@toddtreece
toddtreece / .env
Created July 11, 2014 00:15
phant port change example
PHANT_PORT=8080
PHANT_TELNET_PORT=8081
@Catharz
Catharz / sweet_time.swift
Created August 1, 2014 03:00
/*
Some syntactic sugar for dealing with Time in Swift
Examples:
3.days.inHours
3.6.hours.ago
12.hours.inDays
*/
@quellish
quellish / fetchThingsWithCompletion.m
Created August 9, 2014 20:07
Pseudo-sample of a core data fetch with a completion block.
- (void) fetchThingsWithCompletion:(void (^)(NSArray *, NSError *))completion{
[context performBlock:^{
result = [context executeFetch:...
if (completion != nil){
completion(result, error);
}
}];
}
@quellish
quellish / waitForBlock.m
Created August 9, 2014 20:09
Pseudo-sample of synchronous use of Core Data performBlock: using dispatch group
group = dispatch_group_create();
dispatch_group_enter(group);
[context performBlock:^{
result = [context executeFetch:...
dispatch_group_leave(group);
}];
groupResult = dispatch_group_wait(group, DISPATCH_TIME_FOREVER);
@quellish
quellish / JSONCoreData.m
Created September 21, 2014 08:47
Assigning JSON values to a Core Data Managed Object
NSEntityDescription *entityDescription = nil;
NSArray *attributeNames = nil;
NSDictionary *mappedValues = nil;
entityDescription = [managedObject entity];
attributeNames = [[entity attributesByName] allKeys];
mappedValues = [jsonObject dictionaryWithValuesForKeys:attributeKeys];
[managedObject setValuesForKeysWithDictionary:mappedValues];
@cabeca
cabeca / simulator_populator
Created September 23, 2014 21:30
This script removes and recreates all simulators in Xcode 6.
#!/usr/bin/env ruby
device_types_output = `xcrun simctl list devicetypes`
device_types = device_types_output.scan /(.*) \((.*)\)/
runtimes_output = `xcrun simctl list runtimes`
runtimes = runtimes_output.scan /(.*) \(.*\) \((com.apple[^)]+)\)$/
devices_output = `xcrun simctl list devices`
devices = devices_output.scan /\s\s\s\s(.*) \(([^)]+)\) (.*)/