jhurliman

#ifdef DEBUG
    #define kAPIEndpointHost @"http://example.dev"
#else
    #define kAPIEndpointHost @"http://www.example.com"
#endif

#define kAPIEndpointLatest          (kAPIEndpointHost @"/api/latest_content")
#define kAPIEndpointMostPopular     (kAPIEndpointHost @"/api/most_popular")

jhurliman

const char *s;      // read as "s is a pointer to a char that is constant"
char c;
char *const t = &c; // read as "t is a constant pointer to a char"

jhurliman

## for (int i = 0; i < 10; i++) { }

LBL1:
  cmpl  $10, -4(%ebp)             ## -4(%ebp) is the stack address of i. Check if it is less than 10
  jge LBL3                        ## If the previous compare had a greater than or equal to result, exit the loop
  jmp LBL2                        ## Otherwise, jump to the next address (this instruction will get optimized away)
LBL2:
  movl  -4(%ebp), %eax            ## Load i into the EAX register (where the arithmetic happens!)
  addl  $1, %eax                  ## Add 1 to the EAX register
  movl  %eax, -4(%ebp)            ## Copy the EAX register back on to the stack at the address for i.

jhurliman

//
//  UIViewController+SegueData.h
//  SegueDataPassing - Helper method for performing a segue and passing data to
//                     the destination view controller.
//
//  Created by John Hurliman on 10/21/14.
//  Copyright (c) 2014 John Hurliman. Released under the MIT license.
//  http://opensource.org/licenses/MIT
//

jhurliman

// List all font families and font names in iOS
for (NSString *familyName in UIFont.familyNames) {
    NSLog(@"%@", familyName);
    for (NSString *fontName in [UIFont fontNamesForFamilyName:familyName]) {
        NSLog(@"    %@", fontName);
    }
}

jhurliman

varying vec2 textureCoordinate;

uniform sampler2D inputImageTexture;

vec3 rgb2xyz(vec3 c) {
    vec3 tmp;
    tmp.x = (c.r > 0.04045) ? pow( (c.r + 0.055) / 1.055, 2.4) : c.r / 12.92;
    tmp.y = (c.g > 0.04045) ? pow( (c.g + 0.055) / 1.055, 2.4) : c.g / 12.92;
    tmp.z = (c.b > 0.04045) ? pow( (c.b + 0.055) / 1.055, 2.4) : c.b / 12.92;
    

jhurliman

varying vec2 textureCoordinate;

uniform sampler2D inputImageTexture;

vec3 lab2xyz(vec3 c) {
    float fy = (c.x + 16.0) / 116.0;
    float fx = c.y / 500.0 + fy;
    float fz = fy - c.z / 200.0;
    
    return vec3( 95.047 * ((fx > 0.206897) ? fx * fx * fx : (fx - 16.0 / 116.0) / 7.787),

jhurliman

var ALPHABET = '-0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz';

function generateFirebaseID() {
  var timestamp = +new Date();
  var chars = Array(20);
  for (var i = 7; 0 <= i; i--) {
    chars[i] = ALPHABET.charAt(timestamp % 64);
    timestamp = Math.floor(timestamp / 64);
  }

jhurliman

#include <sys/utsname.h>

+ (BOOL)isIPhone6OrNewer
{
    static int major = -1;
    
    if (major == -1) {
        struct utsname unameData;
        if (0 != uname(&unameData)) {
            major = 0;

jhurliman

+ (BOOL)isValidEmail:(NSString *)str
{
   NSString *emailRegex = @"[A-Z0-9a-z\\._%+-]+@([A-Za-z0-9-]+\\.)+[A-Za-z]{2,4}";
   NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex];
   return [emailTest evaluateWithObject:str];
}