kanghyojun

PSQL

Magic words:

psql -U postgres

If run with -E flag, it will describe the underlaying queries of the \ commands (cool for learning!).

Most \d commands support additional param of __schema__.name__ and accept wildcards like *.*

kanghyojun

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>Ansi 0 Color</key>
	<dict>
		<key>Blue Component</key>
		<real>0.25882352941176467</real>
		<key>Green Component</key>
		<real>0.21176470588235294</real>

kanghyojun

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>ANSIBlackColor</key>
	<data>
	YnBsaXN0MDDUAQIDBAUGKSpYJHZlcnNpb25YJG9iamVjdHNZJGFyY2hpdmVyVCR0b3AS
	AAGGoKcHCBMXGyImVSRudWxs1QkKCwwNDg8QERJcTlNDb21wb25lbnRzVU5TUkdCXE5T
	Q29sb3JTcGFjZV8QEk5TQ3VzdG9tQ29sb3JTcGFjZVYkY2xhc3NPECgwLjAyNzQ1MTAw
	NjcgMC4yMTE3NjQ3MjMxIDAuMjU4ODIzNDg0MiAxTxAoMC4wMzkzODA3NDc4MiAwLjE2

kanghyojun

// error c program

int main() {
  printf("%d", x);
}

// no error python program

a = 1;
if a != 1:

kanghyojun

Object.prototype.hijack = function(f) {
  var o = this;

  for(k in o) {
    (function(key) {
      if(o[key] instanceof Function) {
        var t = o[key].clone();
        o[key] = function() {
          return f(o, key, t, arguments);
        }

kanghyojun

on write_to_file(this_data, target_file, append_data) -- (string, file path as string, boolean)
	try
		set the target_file to the target_file as text
		set the open_target_file to ¬
			open for access file target_file with write permission
		if append_data is false then ¬
			set eof of the open_target_file to 0
		write this_data to the open_target_file starting at eof
		close access the open_target_file
		return true

kanghyojun

#include <stdio.h>

int main() {
  printf("Hello World");
  return 0;
}

kanghyojun

from os import walk
from os.path import join
from threading import Timer
from subprocess import call
from datetime import datetime


def do(f, time, *args):
    f(*args)
    Timer(time, lambda: do(f, time, *args)).start()

kanghyojun

function o = myref(A)
  row = length(A(:, 1));
  
  for i=1:1:row
      current_row = A(i, :);
      for j=i+1:1:row
        compare_row = A(j, :);
        f = current_row(1, i);
        s = compare_row(1, i);
        mult_row = current_row * (s / f);

kanghyojun

p = Person()
for k, v in payload.iteritems():
     setattr(p, k, v)