nicklockwood

Thoughts on Swift 2 Errors

When Swift was first announced, I was gratified to see that one of the (few) philosophies that it shared with Objective-C was that exceptions should not be used for control flow, only for highlighting fatal programming errors at development time.

So it came as a surprise to me when Swift 2 brought (What appeared to be) traditional exception handling to the language.

Similarly surprised were the functional Swift programmers, who had put their faith in the Haskell-style approach to error handling, where every function returns an enum (or monad, if you like) containing either a valid result or an error. This seemed like a natural fit for Swift, so why did Apple instead opt for a solution originally designed for clumsy imperative languages?

I'm going to cover three things in this post:

tenderlove

#!/usr/bin/env ruby --disable-gems

# Tab completion for minitest tests.
#
# INSTALLATION:
#
# 1. Put this file in a directory in your $PATH.  Make sure it's executable
# 2. Run this:
#
#   $ complete -o bashdefault -f -C /path/to/this/file.rb ruby

lisamelton

#!/bin/bash
#
# convert-video.sh
#
# Copyright (c) 2013-2014 Don Melton
#

about() {
    cat <<EOF
$program 2.0 of December 3, 2014

akisute

import Foundation

class GrayShark {
    var name:String
    var howSwim:String
    
    init(name:String, howSwim:String) {
        self.name = name
        self.howSwim = howSwim;
    }

luisobo

__attribute__((constructor))
void PIXWhatPartOfAdvertisingTrackingEnabledDidYouNotUnderstand(void) {
    if (![[ASIdentifierManager sharedManager] isAdvertisingTrackingEnabled]) {
        IMP newImplementation = imp_implementationWithBlock(^NSUUID *{
            return nil;
        });
        Method m = class_getInstanceMethod([ASIdentifierManager class], @selector(advertisingIdentifier));
        method_setImplementation(m, newImplementation);
    }
}

hoshi-takanori

CLASS_NAME = MyObject
OBJS = main.o $(CLASS_NAME).o $(CLASS_NAME)Tests.o
PROGRAM = a.out

CFLAGS = -Wall -F$(FWPATH)
LIBS = -F$(FWPATH) -framework XCTest -framework Foundation

FWPATH = /Applications/Xcode.app/Contents/Developer/Library/Frameworks
XCTEST = /Applications/Xcode.app/Contents/Developer/usr/bin/xctest

lisamelton

#!/bin/bash
#
# convert-video.sh
#
# Copyright (c) 2013-2014 Don Melton
#

about() {
    cat <<EOF
$program 2.0 of December 3, 2014

cartazio

PSA :

just use GHC for OSX https://ghcformacosx.github.io

the rest of these directions are preserved for historical purposes

TLDR version, if you have homebrew

xcode-select --install ; brew tap homebrew/versions ;   brew tap homebrew/dupes \

steipete

// Taken from the commercial iOS PDF framework http://pspdfkit.com.
// Copyright (c) 2014 Peter Steinberger, PSPDFKit GmbH. All rights reserved.
// Licensed under MIT (http://opensource.org/licenses/MIT)
//
// You should only use this in debug builds. It doesn't use private API, but I wouldn't ship it.

// PLEASE DUPE rdar://27192338 (https://openradar.appspot.com/27192338) if you would like to see this in UIKit.

#import <objc/runtime.h>
#import <objc/message.h>

subdigital

xcode_proj=`find . -name "*.xc*" -d 1 | sort -r | head -1`

if [ `echo -n $xcode_proj | wc -m` == 0 ]
then
  echo "No xcworkspace/xcodeproj file found in the current directory."
  exit 1
fi

echo "Found $xcode_proj"
open $xcode_proj