Harmonious Node.js

Setting up NVM w/ ZSH

Execute the following

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mkdir -p ~ZSH_CUSTOM/plugins
cd ~ZSH_CUSTOM/plugins
git clone git://github.com/rummik/nvm-zsh.git
cd nvm-zsh
git submodule update --init

Then edit the plugins array in your ~/.zshrc to include nvm-zsh so that it
looks somewhat like this: plugins=(nvm-zsh history-substring-search git osx ruby)

Installing a newer version of node

  • Run nvm ls-remote to determine the latest version of Node
  • Install it: nvm install v0.11.15
  • Run node --v8-options | grep harmony to determine which harmony features are supported
  • Start using harmony features by running your code with node --harmony foo.js

Gotchas w/ Arrow Functions in ES6/Harmony

Note that the following does not work:

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function ES6Example(){}
ES6Example.prototype.foo = function(bar){
return ((baz) => {
this.bar = baz
})(bar)
}
var es6Example = new ES6Example
es6Example.foo('qux')
console.info(es6Example.bar) //undefined

But this does:

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function ES6Example(){
this.foo = baz => {
this.bar = baz
}
}
var es6Example = new ES6Example
es6Example.foo('qux')
console.info(es6Example.bar) // 'qux'


Installing mpstat

I’m testing out Scout App for server monitoring. It requires something called mpstat and it apparently isn’t installed.
To get it, run apt-get install sysstat.