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boto3 quick hands-on

This documentation aims at being a quick-straight-to-the-point-hands-on AWS resources manipulation with [boto3][0].

First of all, you'll need to install [boto3][0]. Installing it along with [awscli][1] is probably a good idea as

• [awscli][1] is boto-based
• [awscli][1] usage is really close to boto's

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import Foundation

// Some interesting observations on block comparing. Apparently swift nor objective c don't allow comparing closures
// due to the complexity of the process and because of compiler optimisations… bla bla. But it seems to be possible
// to do this using conventions blocks, aka the objective c ones that can be cast as objects. The interesting part 
// is how swift freely casts SwfBlock to ObjBlock, yet in reality two casted SwfBlock blocks will always be different
// values, while ObjBlocks won't. When we cast ObjBlock to SwfBlock, the same thing happens to them, they become two
// different values. So, in order to preserve the reference, this sort of casting should be avoided.

typealias SwfBlock = () -> ()

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    ACTION = build
    AD_HOC_CODE_SIGNING_ALLOWED = NO
    ALTERNATE_GROUP = staff
    ALTERNATE_MODE = u+w,go-w,a+rX
    ALTERNATE_OWNER = grantdavis
    ALWAYS_SEARCH_USER_PATHS = NO
    ALWAYS_USE_SEPARATE_HEADERMAPS = YES
    APPLE_INTERNAL_DEVELOPER_DIR = /AppleInternal/Developer
    APPLE_INTERNAL_DIR = /AppleInternal
    APPLE_INTERNAL_DOCUMENTATION_DIR = /AppleInternal/Documentation

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import AppKit

extension NSView
{

    /// Checks if view overlaps with other views above it at specified **window** location.

    func overlapTest(_ point: NSPoint) -> Bool {

        // Perform hit test to get the view under mouse. Because it can be a view within

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#import <Foundation/Foundation.h>
#import <MyProject/MyProject-Swift.h>

// This was a more concise solution in Swift 4.2 and earlier. If you try this with Swift 5 you'd get "Swift class
// extensions and categories on Swift classes are not allowed to have +load methods" runtime error.

// @implementation Foo (private)
//     + (void)load { [self swiftyLoad]; }
//     + (void)initialize { [self swiftyInitialize]; }
// @end

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#import <AVFoundation/AVFoundation.h>

@interface MLWAsyncAVPlayer : AVPlayer

@end

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extension Reactive {

    /// A proxy which holds reactive binding target extensions of `Base`.
    struct Binds<Base> {
        fileprivate init(_ base: Base) { self.base = base }
        let base: Base
    }

    var bind: Binds<Base> { return Binds(self.base) }

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class Foo: ReactiveExtensionsProvider {
    let pipe = Signal<String, NoError>.pipe()
    var bar: String = "Such bar!" {
        didSet { self.pipe.input.send(value: self.bar) }
    }
}

extension Reactive.Binds where Base: Foo {
    var bar: BindingTarget<String> {
        return self.reactive.makeBindingTarget({ $0.bar = $1 })

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let fooOne: Foo = Foo()
let fooTwo: Foo = Foo()

fooOne.reactive.signal.bar.observeValues({ Swift.print($0) })
fooOne.reactive.bind.bar <~ fooTwo.reactive.signal.bar

fooOne.bar = "Such b-a-r!"
fooTwo.bar = "Very BAR!"

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import AppKit
import Metal
import QuartzCore

let view = NSView(frame: CGRect(x: 0, y: 0, width: 600, height: 400))
let circle = NSView(frame: CGRect(x: 0, y: 0, width: 50, height: 50))

circle.wantsLayer = true
circle.layer?.backgroundColor = NSColor.red.cgColor
circle.layer?.cornerRadius = 25