gingray

Why?

This:

.action {
  @extend .ml-3;
}

gingray

How to patch Android app to sniff its HTTPS traffic with self-signed certificate

• Download apktool from https://ibotpeaches.github.io/Apktool/
• Unpack apk file: java -jar /home/expert/work/tools/apktool.jar d net.flixster.android-9.1.3@APK4Fun.com.apk
• Modify AndroidManifest.xml by adding android:networkSecurityConfig="@xml/network_security_config" attribute to application element.
• Create file /res/xml/network_security_config.xml with following content:

<?xml version="1.0" encoding="utf-8"?>
<network-security-config>
    <base-config>

gingray

# Mac
IO.popen('pbcopy', 'r+') { |clipboard| clipboard.puts html_out }

# Linux
IO.popen(’xsel –clipboard –input’, ‘r+’) { |clipboard| clipboard.puts html_out }

gingray

Download and install p4merge

• Download the perforce visual tool suite from here: http://www.perforce.com/perforce/downloads/index.html
• Copy only the p4merge.app file into your /Applications/ directory

brew cask install p4v

Setup p4merge as a visual mergetool

gingray

Using git bisect

Git provides a simple way to find out where some code was modified or removed from your codebase. You can use git bisect for that and the processes can be completely automated.

As example I will try to find out when the method send_email_notification was removed from the file app/models/person.rb. So you have to create a automated bash file, or other kind of script, that should return 0 when the method is found and 1 otherwise. So git can run this script for each commit until it returns 1, which means that the method was removed in that commit. There's the script we gonna use:

if [[ `cat app/models/person.rb | grep send_email_notification` ]]; then

gingray

require 'benchmark'

Benchmark.bmbm do |x|

  x.report('Break') do
    1_000_000.times do
      break
    end
  end

gingray

--- Actions ---
$Copy                                              <M-C>
$Cut                                               <M-X> <S-Del>
$Delete                                            <Del> <BS> <M-BS>
$LRU                                              
$Paste                                             <M-V>
$Redo                                              <M-S-Z> <A-S-BS>
$SearchWeb                                         <A-S-G>
$SelectAll                                         <M-A>
$Undo                                              <M-Z>

gingray

Intellij IDEA - Cheat Sheet (aka most useful shortcuts)

Note: Some of these keymapping are specific to IdeaVim plugin. If you don't use IdeaVim (what' wrong with you :)), I've tried to point out where they differ, but I could have missed a few

Coding Session

Parameter documentation for Method Calls

• Ctrl-P - Popup parameter documentation for method calls

gingray

(defun copy-current-line-position-to-clipboard ()
  "Copy current line in file to clipboard as '</path/to/file>:<line-number>'"
  (interactive)
  (let ((path-with-line-number
         (concat (buffer-file-name) ":" (number-to-string (line-number-at-pos)))))
    (x-select-text path-with-line-number)
    (message (concat path-with-line-number " copied to clipboard"))))

(define-key global-map (kbd "M-l") 'copy-current-line-position-to-clipboard)

gingray

Latency Comparison Numbers
--------------------------
L1 cache reference                           0.5 ns
Branch mispredict                            5   ns
L2 cache reference                           7   ns                      14x L1 cache
Mutex lock/unlock                           25   ns
Main memory reference                      100   ns                      20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy             3,000   ns        3 us
Send 1K bytes over 1 Gbps network       10,000   ns       10 us
Read 4K randomly from SSD*             150,000   ns      150 us          ~1GB/sec SSD