raeffu

any vs. unknown type

TypeScript 3.0 introduces a new top type unknown. unknown is the type-safe counterpart of any. Anything is assignable to unknown, but unknown isn’t assignable to anything but itself and any without a type assertion or a control flow based narrowing. Likewise, no operations are permitted on an unknown without first asserting or narrowing to a more specific type.

• https://mariusschulz.com/blog/the-unknown-type-in-typescript#:~:text=The%20main%20difference%20between%20unknown,on%20values%20of%20type%20any%20.
• https://www.typescriptlang.org/docs/handbook/release-notes/typescript-3-0.html#new-unknown-top-type

Type Guards

• DO use type gurads when you need to distinguish between type. You can use typeof and instaceof type guards if writing a type guard function is overkill.

raeffu

Manually install Emacs 25.3 with Homebrew

1. Uninstall emacs with brew uninstall emacs or brew uninstall --ignore-dependencies emacs if you get a dependency error.
2. Install emacs 25.3 with brew install --build-from-source https://gist.githubusercontent.com/raeffu/49de231b3b846bdb6ab9824a876221f0/raw/1c860b88c6a41146153a9376e807f2b397849eab/emacs.rb --with-cocoa

raeffu

tmux shortcuts & cheatsheet

start new:

tmux

start new with session name:

tmux new -s myname

raeffu

#include <avr/interrupt.h>
#include <avr/io.h>
volatile int event = 0;
volatile unsigned long time;
volatile unsigned long startTime;

void setup() { //Initialisierungen
  Serial.begin(9600);    //Baudrate für serielle Kommunikation.
  //ACSR = 3;  //Analog Comperator fallende Flanke, externe Referenzspannung auf Pin D6
  // ACSR = 2; //Analog Comperator steigendee Flanke, externe Referenzspannung auf Pin D6

raeffu

private boolean findCycle(int[][] ad, int p, boolean[] visited) {
  visited[p] = true;
  for (int i = 0; i < ad.length; i++)
  {
      if(ad[p][i] == 1 && !visited[i])
        return findCycle(ad, i, visited);
      else if(ad[p][i] == 1 && visited[i]) // back-edge found --> has cycle
        return true;
  }
  return false;

raeffu

Installation steps for FunctionFlip on OSX Yosemite

1. Install FunctionFlip 2.2.2
2. Open System Preferences, Security & Privacy > Privacy panel, Accessibility
3. Open terminal
4. If FunctionFlip is installed for all users go to step 6
5. If FunctionFlip is installed only for current user go to step 7
6. Enter open /Library/PreferencePanes/FunctionFlip.prefPane/Contents/Resources in terminal
7. Enter open ~/Library/PreferencePanes/FunctionFlip.prefPane/Contents/Resources in terminal
8. Drag and Drop FunctionFlip.app to the list of Accessibility-Apps in System Preferences you have opened in step 2.

raeffu

boolean solve(configuration conf){
  if(no more choices) // BASE CASE
    return (conf is goal state);
  
  for(all available choices){
    try one choice c;
    if(solve(conf with choice c made)) return true;
    
    unmake choice c;
  }

raeffu

rewrite (merge) commit, HEAD^ or older:

git checkout <sha of merge>
git commit --amend # edit message
git rebase HEAD previous_branch

https://github.com/schacon/showoff
github pages

git config --global merge.tool opendiff

raeffu

sudo /Developer/Library/uninstall-devtools –mode=all

raeffu

/* clearfix */
  
.group:before,
.group:after {
  content: "";
  display: table;
}
.group:after {
  clear: both;
}