- Array 是 value type，使用 structs 实现
- 数据类型没有隐式转换
- 对于 String，count() 的复杂度是 O(n)，每一个 Character 都是 unicode scalars 的序列
- raw values 和 associated values 的区别
- 如果必要，对于实现了 _ObjectiveCBridgeable 的 value types 会被自动桥接成 reference types
- 讲一下 unowned 和 weak 的区别
- 改 struct 的属性的方法名前要加 mutating，但如果这个 struct 用 let 声明的，改不了。修正：网友指出用 nonmutating set 也可以改属性。
- nil 和 .None 的区别
- capture list in closure
- 举一个 guard ... where 的例子
Lex Tang lexrus
🏠
lexrus
/ ToggleHDRCatalina.applescript
Created
March 26, 2020 02:26
Workaround the HDR bug of macOS Catalina 10.15.4
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| tell application "System Preferences" | |
| activate | |
| end tell | |
| tell application "System Events" | |
| tell process "System Preferences" | |
| activate | |
| delay 1 | |
| click menu item "Displays" of menu "View" of menu bar 1 | |
| delay 1 |
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| import Cocoa | |
| import CreateML | |
| let 双色球神算子 = try MLTextClassifier(trainingData: [ | |
| "中奖啦": [ | |
| "09 11 14 20 27 30 09", | |
| "02 09 14 15 16 23 10", | |
| "11 16 19 22 25 30 08", | |
| "02 05 06 13 16 19 03", | |
| "04 09 15 16 19 27 10", |
lexrus
/ CandleChart.swift
Created
June 21, 2018 03:50
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| import UIKit | |
| import PlaygroundSupport | |
| let chartData: [Double] = [1, 2, 4, 0, 0, 2, 6, 0, 4, 8, 12, 14, 1, 2, 2, 0, 0, 1, 6, 0, 4, 0, 3, 0] | |
| class TimelineCandleChart: UIView { | |
| var data: [Double] = [] { | |
| didSet { setNeedsDisplay() } | |
| } |
lexrus
/ RxTextFieldDelegateProxy.swift
Created
February 14, 2018 03:33
RxSwift extension for textFieldShouldReturn of UITextFieldDelegate
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| // | |
| // RxTextFieldDelegateProxy.swift | |
| // | |
| // Created by Lex Tang on 2/14/18. | |
| // Copyright © 2018 Krunoslav Zaher. All rights reserved. | |
| // | |
| import RxSwift | |
| import RxCocoa |
lexrus
/ update_settings_version.sh
Created
August 10, 2017 07:33
Update version string in Settings.bundle
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| #!/bin/bash | |
| PLISTBUDDY="/usr/libexec/PlistBuddy" | |
| INFO_PLIST="$CODESIGNING_FOLDER_PATH/Info.plist" | |
| SETTINGS_PLIST="$CODESIGNING_FOLDER_PATH/Settings.bundle/Root.plist" | |
| VERSION_NUMBER="`$PLISTBUDDY -c \"Print CFBundleShortVersionString\" \"$INFO_PLIST\"`" | |
| BUILD_NUMBER="`$PLISTBUDDY -c \"Print CFBundleVersion\" \"$INFO_PLIST\"`" | |
| VERSION="Version $VERSION_NUMBER ($BUILD_NUMBER)" | |
| GROUP_INDEX="`xmllint --xpath \"count(//array/dict)-1\" \"$SETTINGS_PLIST\"`" | |
| $PLISTBUDDY -c "Set :PreferenceSpecifiers:$GROUP_INDEX:Title '$VERSION'" "$SETTINGS_PLIST" |
lexrus
/ CollectionOperator.swift
Created
April 24, 2017 08:53
Avoid hard-coded KVC collection operators
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| import Foundation | |
| enum CollectionOperator: String { | |
| case avg | |
| case count | |
| case max | |
| case min | |
| case sum |
lexrus
/ enable-von-forward-nat.sh
Created
June 15, 2016 12:44
Enable VPN forward for OpenVPN on Mac OS X El Capitan
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| # | |
| # https://roelant.net/2015/share-your-vpn-mac-el-capitan.html | |
| sleep 15 | |
| # | |
| /usr/sbin/sysctl -w net.inet.ip.fw.enable=1 | |
| /usr/sbin/sysctl -w net.inet.ip.forwarding=1 | |
| /usr/sbin/sysctl -w net.inet6.ip6.forwarding=1 | |
| pfctl -d | |
| pfctl -f /Users/lex/Dropbox/openvpn/pf.conf -e |
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| // | |
| // BackgroundHint.m | |
| // Zus | |
| // | |
| // Created by Lex on 4/13/16. | |
| // Copyright © 2016 lex.sh. All rights reserved. | |
| // | |
| #import <Foundation/Foundation.h> | |
| #import <UIKit/UIKit.h> |
lexrus
/ patch001.lua
Created
February 25, 2016 03:41
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| luaSetWaxConfig({openBindOCFunction="true"}) | |
| waxClass{"Zus.SettingVC"} | |
| function viewDidLoad(self) | |
| print("lua viewDidLoad"); | |
| self:ORIGviewDidLoad(); | |
| self:setTitle("Wax-patched " .. wax.appVersion) | |
| end |