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@dduan
dduan / contracts...Address.sol
Created Jun 16, 2021
Created using remix-ide: Realtime Ethereum Contract Compiler and Runtime. Load this file by pasting this gists URL or ID at https://remix.ethereum.org/#version=builtin&optimize=true&runs=200&gist=
View contracts...Address.sol
pragma solidity >=0.7.0;
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
View rust-tre-command.spec
# Generated by rust2rpm 16
%bcond_without check
%global __cargo_skip_build 0
%global crate tre-command
Name: rust-%{crate}
Version: 0.3.6
Release: 1%{?dist}
Summary: Tree command, improved
@dduan
dduan / toTimestamp.swift
Created Jan 13, 2021
Convert date components (per RFC3339) to seconds since 1970-01-01
View toTimestamp.swift
func toTimestamp(year: Int, month: Int, day: Int, hour: Int, minute: Int, seconds: Int, nanoseconds: Int, offsetInSeconds: Int) -> Double {
var year = year
year -= month <= 2 ? 1 : 0
let era = (year >= 0 ? year : year - 399) / 400
let yoe = year - era * 400
let doy = (153*(month + (month > 2 ? -3 : 9)) + 2)/5 + day - 1
let doe = yoe * 365 + yoe/4 - yoe/100 + doy
let dayCounts = era * 146097 + doe - 719468
let seconds = dayCounts * 86400 + hour * 3600 + minute * 60 + seconds - offsetInSeconds
return Double(seconds) + Double(nanoseconds) / 1_000_000_000
@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 30, 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]
}