simonwhitaker

Here's a nice trick for wrapping a method's implementation in a block, for example for logging the return value.

Have you ever written a method with a load of conditionals and return statements...

- (int)statusCode {
    if (foo) {
        return 1;
    }
    if (bar) {

simonwhitaker

#!/usr/bin/env python
#
# git-flip-flop: checks out two or more commits in a periodic cycle
#
# Save on your $PATH as git-flip-flop
#
# EXAMPLES
#
# Check out abc1234, then def5678, then abc1234, etc, with 
# the default 2s between each checkout

simonwhitaker

/*
Decorate-Sort-Undecorate in Swift

In Swift, you get the length of a String by calling the global function
countElements(). However, The Swift Programming Language states:

> The length of a string cannot be calculated without iterating through 
> the string to consider each of its characters in turn. If you are 
> working with particularly long string values, be aware that the 
> countElements function must iterate over the characters within a string 

simonwhitaker

I was intrigued by this example from The Swift Programming Guide's Extensions section:

extension Double {
    var km: Double { return self * 1_000.0 }
    var m: Double { return self }
    var cm: Double { return self / 100.0 }
    var mm: Double { return self / 1_000.0 }
    var ft: Double { return self / 3.28084 }
}

simonwhitaker

#import <Foundation/Foundation.h>

int main(int argc, char *argv[]) {
    @autoreleasepool {
        NSDateFormatter *goodDateFormatter = [[NSDateFormatter alloc] init];
        goodDateFormatter.dateFormat = @"dd-MM-yyyy HH:mm:ss.SSS";

        NSDateFormatter *badDateFormatter = [[NSDateFormatter alloc] init];
        badDateFormatter.dateFormat = @"dd-MM-YYYY HH:mm:ss.SSS";
        

simonwhitaker

// Error: Cannot invoke 'JSONObjectWithData' with an argument list of type '(NSData, options: Int)'
NSJSONSerialization.JSONObjectWithData(data!, options: 0)

// Error: Type 'NSJSONReadingOptions' does not conform to protocol 'NilLiteralConvertible'
NSJSONSerialization.JSONObjectWithData(data!, options: nil)

// This works, but having to pass in 'rawValue' just feels hacky
NSJSONSerialization.JSONObjectWithData(data!, options: NSJSONReadingOptions(rawValue: 0))

// I'd expect to be able to do something like:

simonwhitaker

let opts: NSJSONReadingOptions = NSJSONReadingOptions(
  rawValue: NSJSONReadingOptions.MutableContainers.rawValue 
          | NSJSONReadingOptions.MutableLeaves.rawValue
)

simonwhitaker

# Get location of unparsed Info.plist
GS_INFO_PLIST_INPUT=$(basename "$INFOPLIST_FILE" .plist)

# Get location of parsed Info.plist
GS_INFO_PLIST_PATH="$BUILT_PRODUCTS_DIR/$FULL_PRODUCT_NAME/Info"

# Get version number from unparsed Info.plist
GS_VERSION=$(defaults read "$PROJECT_DIR/$GS_INFO_PLIST_INPUT" CFBundleVersion)

# Append local SVN revision number

simonwhitaker

- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
    if (UIInterfaceOrientationIsLandscape(fromInterfaceOrientation)) {
        // Fade in instructions
        [self setInstructionsOpacity:1.0 overTime:0.5];
    }
}

simonwhitaker

apps:
 -  name: RSA Vision
    slogan: Enlightenment to go
    itunes_url: http://itunes.apple.com/gb/app/rsa-vision/id397348011?mt=8
    image: /images/apps/rsa-vision.png 
    description:
        - > The RSA Vision app brings to you the latest videos from the 
            RSA's free public events programme. You can browse by category, 
            search for videos and compile a playlist of your favourite 
            videos to watch later.