kongtomorrow

Compiled with:
~/bin/clang/bin/clang -O3 -Rpass=loop-vectorize -Rpass-missed=loop-vectorize -Rpass-analysis=loop-vectorize -isysroot /Volumes/Data/Users/ken/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.10.sdk -framework Foundation /tmp/testcomp/testcomp/main.m

Interesting part of diagnostic output:
/tmp/testcomp/testcomp/main.m:57:13: remark: vectorized loop (vectorization factor: 16, unrolling interleave factor: 1) [-Rpass=loop-vectorize]
            testBuffer[i] = (bytes[i] >= 128);
            ^

output:
2014-12-03 11:33:33.070 a.out[48363:2396624] shortLen: 6 longLen:2493109

kongtomorrow

% swiftc -Xllvm -help-hidden /tmp/foo.swift
USAGE: swift (LLVM option parsing) [options]

OPTIONS:
  -a9-754319-workaround                      - Enable workarounds for A9 HW bugs #754319
  -a9-754320-workaround                      - Enable workarounds for A9 HW bugs #754320
  -aarch64-use-tbi                           - Assume that top byte of an address is ignored
  -agg-antidep-debugdiv=<int>                - Debug control for aggressive anti-dep breaker
  -agg-antidep-debugmod=<int>                - Debug control for aggressive anti-dep breaker
  -aggressive-ext-opt                        - Aggressive extension optimization

kongtomorrow

let é = "precomposed character!"
let é = "decomposed characters!"

println(é) // prints "precomposed character!"
println(é) // prints "decomposed characters!"

kongtomorrow

func logWrap<Domain,Range>(f : Domain->Range) -> Domain->Range {
    return { (args:Domain) -> Range in
        println("called me!")
        return f(args)
    }
}

func foo(a:Int, b:Int)->Int {
    return a + b
}

kongtomorrow

@interface UIView (LayoutConvenience)
- (NSLayoutConstraint *)constraintAligningAttribute:(NSLayoutAttribute)attr withView:(UIView *)otherView;
@end

@implementation UIView (LayoutConvenience)
- (NSLayoutConstraint *)constraintAligningAttribute:(NSLayoutAttribute)attr withView:(UIView *)otherView {
    return [NSLayoutConstraint constraintWithItem:self attribute:attr relatedBy:NSLayoutRelationEqual toItem:otherView attribute:attr multiplier:1.0 constant:0.0];
}
@end

kongtomorrow

2014-09-21 11:21:04.807 ALtest[42953:7217373] Unable to simultaneously satisfy constraints.
	Probably at least one of the constraints in the following list is one you don't want. Try this: (1) look at each constraint and try to figure out which you don't expect; (2) find the code that added the unwanted constraint or constraints and fix it. (Note: If you're seeing NSAutoresizingMaskLayoutConstraints that you don't understand, refer to the documentation for the UIView property translatesAutoresizingMaskIntoConstraints) 
	
	/// As it says, we need to read the constraints one by one and see if there's one that says something we don't want.
	
(
    "<NSLayoutConstraint:0x7f9e39f344f0 H:[UIButton:0x7f9e39f339d0'1'(20)]>",
    
    /// first button is width 20 – ***I bet you didn't want this and it needs to be deleted***
    

kongtomorrow

func foo() {

    func bar(x:Int)->String {
        return "hello"
    }
    
    [1,2,3].map({bar($0)}) // "Cannot reference a local function from another local function"
    
}

kongtomorrow

func benchmark<T>(label:String, body:()->T) {
    var info = mach_timebase_info_data_t(numer: 0, denom: 0)
    mach_timebase_info(&info)
    
    let tick = mach_absolute_time()
    let res = body()
    let tock = mach_absolute_time()
    let delta = tock - tick
    
    let nanos = delta * UInt64(info.numer) / UInt64(info.denom)

kongtomorrow

func foo(f:()->(Int?)) {
    println(f())
}

let bar : ()->Int = { 3 }

// foo shouldn't be able to take bar, should it?
foo(bar) // prints Optional(3)

// you're freaking me out, Swift. Did it allocate a wrapping closure?

kongtomorrow

operator infix !|| { associativity right precedence 100 } // associativity/precedence copied from ternary ? :
@infix func !||<T>(lhs:T?, rhs:@auto_closure ()->T) -> T {
    switch lhs {
    case nil: return rhs()
    case _: return lhs!
    }
}