dungsaga

This is my attempt to improve on the regex that match 99.99% of email from https://www.regular-expressions.info/email.html

This is a practical implementation of RFC 5322 where I omitted IP addresses, domain-specific addresses, the syntax using double quotes and square brackets.

• Maximum length of email address is 254
• Maximum length of the local part is 64
• The local part must not contain double dots and must not start or end with a dot.
• Maximum length of each domain label is 63
• The domain part must contain at least 2 domain labels, each domain label must not start or end with a hyphen. Domain labels are separated by 1 dot.
• The top level domain must contain only alphabet letters and must contain at least 2 letters.

dungsaga

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

dungsaga

Introductory resources

• High level overview https://yogthos.github.io/ClojureDistilled.html
• An Animated Introduction to Clojure https://markm208.github.io/cljbook/
• Interactive tutorial in a browser https://tryclojure.org/
• Interactive exercises http://clojurescriptkoans.com/
• More interactive exercises https://4clojure.oxal.org/
• Lambda Island tutorials https://lambdaisland.com/
• Functional Programming with Clojure resources https://practicalli.github.io/
• Getting started guide https://grison.me/2020/04/04/starting-with-clojure/

dungsaga

#Original command that was run
"C:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe" -NonInteractive -NoProfile -Command "& {function Run-Server() { param([string]$h); $b = New-Object byte[] 8; $p = New-Object System.IO.Pipes.AnonymousPipeClientStream -ArgumentList @([System.IO.Pipes.PipeDirection]::In, $h); if ($p) { $l = $p.Read($b, 0, 8); while ($l -gt 7) { $c = [System.BitConverter]::ToInt32($b, 0); $l = [System.BitConverter]::ToInt32($b, 4); $t = $null; if ($l -gt 0) { $t1 = New-Object byte[] $l; $l = $p.Read($t1, 0, $t1.Length); $t = [System.Text.Encoding]::UTF8.GetString($t1, 0, $l) } if ($c -eq 1) { Invoke-Expression $t } elseif ($c -eq 9) { break } $l = $p.Read($b, 0, 8) } $p.Dispose() } } Run-Server -h 1860}"

#Deobfuscated command
"C:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe" -NonInteractive -NoProfile -Command

# & is similar to Invoke-Expression except it will create an additional scope
& {
    function Run-Server(){
        #$h has a string value of 1860 passed from the below

dungsaga

// remove "pp=" from query string of all "href" in a Youtube page
for (a of document.getElementsByTagName('a')) { a.setAttribute('href', a.getAttribute('href')?.replace(/&pp=.+/, '')) }

dungsaga

If someone forks a gist and you'd like to merge their changes. Do this:

1. clone your repo, I use the name of the gist

    git clone git://gist.github.com/1163142.git gist-1163142
   

2. add a remote for the forked gist, I'm using the name of my fellow developer

    git remote add aaron git://gist.github.com/1164196.git
   

dungsaga

Available Wildcarded DNS Domains

It turns out that some kind hearted people already set up wildcarded domains for you already. You can use any top level domain below and any subdomain of these and they will always resolve back to 127.0.0.1 (your local machine). Here's the list of ones I know about. Let me know if there are more!

• 127-0-0-1.org.uk
• 42foo.com
• beweb.com
• domaincontrol.com
• feacebook.com
• fuf.me - Managed by @fidian; it will always point to localhost for IPv4 and IPv6

dungsaga

Available Public Wildcard DNS Domains pointing to localhost (127.0.0.1)

It turns out that some kind hearted people already set up wildcard domains for you already. You can use any domain below and/or any subdomain of these and they currently resolve to 127.0.0.1 but could switch at any time to resolve somewhere else. Here's the list of ones I know about. Let me know if there are more!

• localhost - It will always works. Do you know why? I hope so.
• [*.]fuf.me - Managed by @fidian; it will always point to localhost for IPv4 and IPv6
• [*.]fbi.com - 👏 👏 👏 👏 👏
• [*.]localtest.me
• [*.]127-0-0-1.org.uk
• [*.]vcap.me

dungsaga

how to build HeidiSql

prerequisite

• install Embarcadero Delphi 10.4 Community Edition (https://www.embarcadero.com/products/delphi/starter/free-download)
• install madExcept 5 (https://www.madshi.net/madExceptDescription.htm)
• get source code git clone https://github.com/HeidiSQL/HeidiSQL
• run build-res.bat
• run source\vcl-styles-utils\CompileResources.bat (edit it to fix the path to brcc32.exe)
• run source\vcl-styles-utils\CompileResources_zip.bat (edit it to fix the path to brcc32.exe)

dungsaga

#based on 
# - http://blogs.msdn.com/b/heaths/archive/2007/01/31/how-to-safely-delete-orphaned-patches.aspx 
# - http://www.bryanvine.com/2015/06/powershell-script-cleaning-up.html
# - https://p0w3rsh3ll.wordpress.com/2012/01/10/working-with-the-windowsinstaller-installer-object/

clear-host

function Get-WindowsInstallerPatchInfo {
    [CmdletBinding()]
    Param ()