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@dduan
dduan / cube.swift
Last active Nov 26, 2020
A rotating 3-D cube in terminal. Written in Swift
View cube.swift
/// A rotating 3-D cube in terminal
/// Only works on macOS
/// Run `swift cube.swift` in a terminal application to run it.
/// For controlling the cube, see comments for `Key` in code.
import Darwin
enum RawModeError: Error {
case notATerminal
case failedToGetTerminalSetting
@dduan
dduan / bird.swift
Created Nov 14, 2020
Flappy bird as a CLI app written in Swift.
View bird.swift
// This is the code for the Flappy Bird game running in a Unix terminal.
// Demo: https://twitter.com/daniel_duan/status/1327735679657250816?s=21
// To run it, simply do "swift bird.swift" in a Unix command line.
#if canImport(Darwin)
import Darwin
#else
import Glibc
#endif
enum RawModeError: Error {
@dduan
dduan / runInRawMode.swift
Last active Nov 15, 2020
Put terminal in raw mode, clear the screen, run some code. Reset the terminal to original mode when the code finish running.
View runInRawMode.swift
#if canImport(Darwin)
import Darwin
#else
import Glibc
#endif
enum RawModeError: Error {
case notATerminal
case failedToGetTerminalSetting
case failedToSetTerminalSetting
@dduan
dduan / EscapingClosurePropertyWrapper.swift
Created Jul 28, 2020
This property wrapper guarantees that a closure does nothing if its enclosing object is deinitialized.
View EscapingClosurePropertyWrapper.swift
@propertyWrapper
struct Escaping {
typealias Closure = () -> Void
var store: Closure
var wrappedValue: Closure {
get { self.store }
set { self.store = newValue }
}
@dduan
dduan / SpeakBubble.swift
Last active Jun 20, 2020
Twitter's voice tweet UI has an interesting animation on iOS. This is an attempt to recreate that animation with SwiftUI. Looks like this https://youtu.be/I6XZzIgWYAQ
View SpeakBubble.swift
import SwiftUI
struct ChaoticPhoto: View {
let image: Image
let radius: CGFloat
@Binding var activated: Bool
@State var scale: CGFloat = 1
var body: some View {
image
.resizable()
@dduan
dduan / drstring.sh
Created Oct 15, 2019
Run DrString anywhere docker is available!
View drstring.sh
#!/bin/bash
temp_file=$(mktemp)
echo 'FROM swift@sha256:c4d53af406c5dc48bd43c0d313f3ed80924eee4bf78907ce4ad6eb8f5513f376' >> temp_file
echo 'RUN git clone https://github.com/dduan/DrString.git; cd DrString; make build; cp .build/release/drstring /bin/drstring' >> temp_file
echo 'RUN rm -rf /data' >> temp_file
echo 'ADD . /data' >> temp_file
echo 'WORKDIR /data' >> temp_file
echo 'ENTRYPOINT ["drstring"]' >> temp_file
@dduan
dduan / RemoveDuplicates.swift
Created Jul 30, 2019
Combine framework: remove duplicates by key paths.
View RemoveDuplicates.swift
import Combine
@available(OSX 10.15, iOS 13.0, tvOS 13.0, watchOS 6.0, *)
extension Publisher {
func removeDuplicates<Property>(by keyPath: KeyPath<Output, Property>)
-> Publishers.RemoveDuplicates<Self> where Property: Equatable
{
return self.removeDuplicates {
$0[keyPath: keyPath] == $1[keyPath: keyPath]
}
@dduan
dduan / BidirectionalCollection+firstIndex.swift
Last active Dec 28, 2018
Find first index of occurrence of a collection in a collection.
View BidirectionalCollection+firstIndex.swift
/// Usage: myString.firstIndex(of: otherString)
extension BidirectionalCollection where Element: Equatable {
func firstIndex(of other: Self) -> Index? {
guard
let start = other.first.flatMap(self.firstIndex(of:)),
self[start...].count >= other.count,
case let end = self.index(start, offsetBy: other.count),
zip(self[start ..< end], other).allSatisfy(==)
else
{
View Repro.swift
import Dispatch
class Runner {
var observers = [String: () -> Void]()
let queue = DispatchQueue(label: "foo-queue")
func run() {
let observers = self.observers
for _ in 0..<20000 {
let c: () -> Void = { [weak self] in
@dduan
dduan / fixup-each-staged-file.py
Last active Sep 18, 2018
Generate commit for each staged file, such that each commit is a `--fixup` to the commit said file was last changed.
View fixup-each-staged-file.py
#!/usr/bin/env python
"""
Generate commit for each staged file, such that each commit is a `--fixup` to
the commit said file was last changed.
NOTE: this command will unstage all files. It also does not disninguish staged
and unstaged potion of the same file.
USAGE: stage files you want to commit, run this command. Interactive rebase with
autosquash: `git rebase -i --autosquash BASE`
You can’t perform that action at this time.