otto-schnurr

git commands to update local copy when default branch name has been changed from master to main:

git branch -m master main
git fetch origin

git branch -u origin/main main

otto-schnurr

# source: @_sa_s
# Quick Xcode tip: if you want to launch a project with a particular Xcode version without running xcode-select, run

env DEVELOPER_DIR=/Applications/Xcode_11.3.app xed .

otto-schnurr

// A re-usable alternative.
// reference: https://rambo.codes/posts/2020-02-20-mvc-with-sugar

public extension UIViewController {
    func install(_ child: UIViewController) {
        addChild(child)

        child.view.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(child.view)

otto-schnurr

Retrieving Logs from Device

Based on Stack Overflow answer here.

• Do the things that make your app generate os_log messages.
• Trigger a [sysdiagnose][].
  • Hold down volume up, volumn down, sleep button.
  • Wait for 1.5 seconds until the device to vibrates.
• If that doesn't work, then press all three buttons briefly and then release.

otto-schnurr

GitHub Pages

Compiled by Otto Schnurr from here in March 2017.

Basics

GitHub Pages is a static site hosting service.

otto-schnurr

From WWDC 2016: Unified Logging and Activity Tracing.

Apple Recommendations

• os_log: Critical details for debugging issues.
• os_log_info: Additional information to embed in error or fault reports.
• os_log_debug: Optional, high-volume information that can be explicitly turned on during development.
• os_log_error: Additional app information is bundled into the log message.
• os_log_fault: Additional system information is bundled into the log message.

otto-schnurr

#!/usr/bin/env python
from fileinput import input as data
from itertools import imap

def ifasta(lines):
    name, dna = None, ''

    for line in imap(str.rstrip, lines):
        if line.startswith('>'):
            if name:

otto-schnurr

#!/usr/bin/env swift

import Foundation.NSString

private extension String {
    var fastaID: String? {
        guard hasPrefix(">") else { return nil }
        return String(characters.dropFirst())
    }

otto-schnurr

#!/usr/bin/xcrun swift -F .
// FileInput module from https://github.com/otto-schnurr/FileInput-swift
import FileInput

func complement(base: Character) -> Character {
    switch base {
        case "A": return "T"
        case "T": return "A"
        case "C": return "G"
        case "G": return "C"

otto-schnurr

#!/usr/bin/xcrun swift -F .
// FileInput module from https://github.com/otto-schnurr/FileInput-swift
import FileInput

func complement(base: Character) -> Character {
    switch base {
        case "T": return "U"
        default: return base
    }
}