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var randomNumbers = [42, 12, 88, 62, 63, 56, 1, 77, 88, 97, 97, 20, 45, 91, 62, 2, 15, 31, 59, 5]
func partition(v: Int[], left: Int, right: Int) -> Int {
var i = left
for j in (left + 1)..(right + 1) {
if v[j] < v[left] {
i += 1
(v[i], v[j]) = (v[j], v[i])
}
}
@bwhiteley
bwhiteley / gist:049e4bede49e71a6d2e2
Last active March 17, 2024 13:10
Initialize Swift subclass of UIView, designed in .xib
// Create CustomView.xib, set File's Owner to CustomView.
// Link the top level view in the XIB to the contentView outlet.
class CustomView : UIView {
@IBOutlet private var contentView:UIView?
// other outlets
override init(frame: CGRect) { // for using CustomView in code
super.init(frame: frame)
self.commonInit()
@CodaFi
CodaFi / alltheflags.md
Last active June 2, 2024 17:09
Every Option and Flag /swift (1.2) Accepts Ever

#Every Single Option Under The Sun

  • optimization level options
  • automatic crashing options
  • debug info options
  • swift internal options
  • swift debug/development internal options
  • linker-specific options
  • mode options
@aazwar
aazwar / xcode_ramdisk.sh
Last active November 26, 2020 19:45
Speed up XCode 7
#!/bin/sh
# Create a RAM disk with same perms as mountpoint
# Script based on http://itux.idev.pro/2012/04/iservice-speed-up-your-xcode-%D0%BD%D0%B5%D0%BA%D0%BE%D1%82%D0%BE%D1%80%D1%8B%D0%B5-%D1%81%D0%BF%D0%BE%D1%81%D0%BE%D0%B1%D1%8B/ with some additions
# Usage: sudo ./xcode_ramdisk.sh start
# PREREQUISITE:
# mkdir /Users/$USERNAME/Library/Developer/Xcode/DerivedData.shadow
## Unless you clear DerivedData folder, you can't mount ramdisk on it
# rm -r /Users/$USERNAME/Library/Developer/Xcode/DerivedData/*
@lattner
lattner / TaskConcurrencyManifesto.md
Last active July 18, 2025 12:29
Swift Concurrency Manifesto
@mort3za
mort3za / git-auto-sign-commits.sh
Last active July 22, 2025 02:23
Auto sign your git commits
# Generate a new pgp key: (better to use gpg2 instead of gpg in all below commands)
gpg --gen-key
# maybe you need some random work in your OS to generate a key. so run this command: `find ./* /home/username -type d | xargs grep some_random_string > /dev/null`
# check current keys:
gpg --list-secret-keys --keyid-format LONG
# See your gpg public key:
gpg --armor --export YOUR_KEY_ID
# YOUR_KEY_ID is the hash in front of `sec` in previous command. (for example sec 4096R/234FAA343232333 => key id is: 234FAA343232333)
@stinger
stinger / DateFormattingPlayground.swift
Created November 14, 2018 15:35
Functional date formatting
import Foundation
extension Date {
typealias FormattedString = (DateFormatter) -> String
func formatted(by format: String) -> FormattedString {
return { formatter in
formatter.dateFormat = format
return formatter.string(from: self)
}
@Gustavo-Kuze
Gustavo-Kuze / force-ctrl-c-v.md
Last active July 9, 2025 06:03
Enable copy and paste in a webpage from the browser console
javascript:(function(){
  allowCopyAndPaste = function(e){
  e.stopImmediatePropagation();
  return true;
  };
  document.addEventListener('copy', allowCopyAndPaste, true);
  document.addEventListener('paste', allowCopyAndPaste, true);
  document.addEventListener('onpaste', allowCopyAndPaste, true);
})(); 
@stinger
stinger / CombineFetcherAndDecoder.swift
Last active February 17, 2024 02:07
Combine - fetching and decoding JSON data
import Foundation
import Combine
enum APIError: Error, LocalizedError {
case unknown, apiError(reason: String), parserError(reason: String)
var errorDescription: String? {
switch self {
case .unknown:
return "Unknown error"

It often be helpful to be able to debug memory usage in Swift on Linux, for example to debug memory leaks.

This is a quick overview of how to generate a report of memory usage for your Swift app. This guide will only show you how to generate the report, not how to analyze it, it might be written up in a blog post later.

Install Valgrind

First we need to install a tool called Valgrind, which is used to trace memory usage.