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Running Node Modules in React Native

How to use packages that depend on Node.js core modules in React Native.

See the [node-libs-react-native][node-libs-react-native] library as a convenience for implementing this method.

Node.js Core Modules

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"use strict";

// A function that wraps a given `React.DOM.input`-like component to
// apply formatting to the value for display purposes.
//
// Example:
//
// var RoundedInput = createFormattedInput(React.DOM.input, {
//   set: Math.round,
// });

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mdn Chrome Search Shortcut

Shortcut to perform a Google I'm Feeling Lucky search on https://developer.mozilla.org.

1. Settings: Manage search engines...

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Fonts in React Native

Default Fonts

A number of fonts are available by default based on the platform (e.g., Roboto on Android, Helvetica on iOS). See the full list here.

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wget http://download.virtualbox.org/virtualbox/4.3.12/VBoxGuestAdditions_4.3.12.iso
sudo mkdir /media/iso
sudo mount -o loop ./VBoxGuestAdditions_4.3.12.iso /media/iso
sudo bash /media/iso/VBoxLinuxAdditions.run --nox11
sudo umount /media/iso

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// Return the "pivot index" of the given array of numbers. The pivot index is
// the index where the sum of the numbers on the left is equal to the sum of
// the numbers on the right.
function pivot(numbers) {
	validateInput(numbers);

	// Find a pivot index by testing each index
	for (var i = 0; i < numbers.length; i++) {
		var leftSum = sum(numbers.slice(0, i));
		var rightSum = sum(numbers.slice(i + 1));

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# Determines how many cpus the virtual machine should be given. Uses half of
# what's available on the host with a default of 4.
def numvcpus
  begin
    os_cpu_cores / 2
  rescue
    4
  end
end

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• className attribute instead of class
• htmlFor attribute instead of for
• <textarea value="something"> instead of <textarea>something</textarea> (see Why Textarea Value)
• <select value="something"><option value="something"></select> instead of <select><option selected value="something"></select> (see Why Select Value)
• Whitespace (see discussion)
• [Tags must be closed and all tags can be self-closing][closing tags]

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Node socket remoteAddress is undefined

If the underlying socket is destroyed, a socket's remoteAddress is no longer accessible and undefined.

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class Plugin < ::Vagrant.plugin("2")
  name "build"
  action_hook('build') do |hook|
    hook.after(Vagrant::Action::Builtin::Provision, 2) do
      system("bash build.sh")
    end
  end
end