Liang Zhou lzhoucs

Homebrew contribution

Update brew formula

Update brew cask

Use cask-repair to update the cask, commit the change, push and create the PR automatically.

Prerequisite

Go to $(brew --repository)/Library/Taps/caskroom/homebrew-cask/Casks directory
github user remote is set to origin, upstream remote is set to upstream. And both remotes are up to date

Steps

cask-repair '<cask_name>'. E.g: cask-repair 'karabiner-elements'
specify new version

Debug `grunt` tasks

node --inspect --debug-brk $(which grunt) <TaskName>

Debug `intern` node tests

replace client with runner, intern with intern-local for functional tests

node --inspect --debug-brk node_modules/intern/client config=_build/tests/intern

Dojo2 example:

nvm & node

git clone https://github.com/creationix/nvm.git ~/.nvm && cd ~/.nvm && git checkout `git describe --abbrev=0 --tags`
nvm install v6  // assume this is done: source "$NVM_DIR/nvm.sh"

rvm & ruby

gpg2 --keyserver hkp://keys.gnupg.net --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3

download latest source from https://sourceforge.net/projects/zsh/files/latest/download?source=files
extract
```
tar -xf zsh-x.y.tar.gz
```
configure

./configure --prefix=/usr --bindir=/bin

Install

uncomment deb-src

sudo vi /etc/apt/sources.list

update

sudo apt-get update

Access modifier

protected internal can block any third party code outside of the assembly from subclassing/overriding methods inside the assembly.

equals

Object.ReferenceEquals() can check reference equality when hashcode()/equals() have been overriden to compare object equality between two objects. In java we can only check either object equality or reference equality, but not both.

package/code organization

drop the first bit

x >> 1;

drop LSB (the least Significant bit)

x & (x - 1);

extracts the lowest set bit of x (all other bits are cleared)

In the following example:

i is defined; j is undefined but declared; k is undeclared thus causing error;
indx is hoisted to the top of the function.

(function () {
  var i = 1;
  var j;
  console.log("i : " + i); // i : 1
  console.log("j : " + j); // j : undefined
 //console.log("k : " + k);// ReferenceError: k is not defined

emacs

cursor-moving

C-f Move forward a character C-b Move backward a character

M-f Move forward a word M-b Move backward a word

C-n Move to next line C-p Move to previous line

	#!/bin/bash

	echo "removing evaluation key"
	rm ~/.IntelliJIdea15/config/eval/idea15.evaluation.key
	# for mac go to: /Users/username/Library/Preferences/IntelliJIdea2016.3/eval/idea163.evaluation.key

	echo "resetting evalsprt in options.xml"
	sed -i '/evlsprt/d' ~/.IntelliJIdea15/config/options/options.xml
	# for mac go to: /Users/lzhoucs/Library/Preferences/IntelliJIdea2016.3/options/options.xml