Saager Mhatre dexterous

Until last night I lived in fear of tildes, carats, resets and reverts in Git. I cargo culted, I destroyed, I laid waste the tidy indicies, branches and trees Git so diligently tried to maintain. Then Zach Holman gave a talk at Paperless Post. It was about Git secrets. He didn't directly cover these topics but he gave an example that made me realize it was time to learn.

A better undo

Generally, when I push out bad code, I panic, hit git reset --hard HEAD^, push and clean up the pieces later. I don't even really know what most of that means. Notational Velocity seems to be fond of it ... in that I just keep copying it from Notational Velocity and pasting it. Turns out, this is dumb. I've irreversibly lost the faulty changes I made. I'll probably even make the same mistakes again. It's like torching your house to get rid of some mice.

Enter Holman. He suggests a better default undo. git reset --soft HEAD^. Says it stag

Your class can be no longer than 100 lines of code.
Your methods can be no longer than five lines of code.
You can pass no more than four parameters and you can’t just make it one big hash.
When a call comes into your Rails controller, you can only instantiate one object to do whatever it is that needs to be done. And your view can only know about one instance variable.

You can break these rules if you can talk your pair into agreeing with you.

	import groovyx.gpars.dataflow.DataFlowQueue
	import groovyx.gpars.dataflow.operator.DataFlowPoisson
	import static groovyx.gpars.dataflow.DataFlow.operator
	import java.util.concurrent.atomic.AtomicInteger

	def upstream = new DataFlowQueue() // empty trays travel back upstream to the producer
	def downstream = new DataFlowQueue() // trays with products travel to the consumer downstream

	def prodWiring = [inputs: [upstream], outputs: [downstream], maxForks: 3 ] // maxForks is optional
	def consWiring = [inputs: [downstream], outputs: [upstream], maxForks: 3 ] // maxForks is optional

	Originally:
	https://gist.github.com/7565976a89d5da1511ce

	Hi Donald (and Martin),

	Thanks for pinging me; it's nice to know Typesafe is keeping tabs on this, and I
	appreciate the tone. This is a Yegge-long response, but given that you and
	Martin are the two people best-situated to do anything about this, I'd rather
	err on the side of giving you too much to think about. I realize I'm being very
	critical of something in which you've invested a great deal (both financially

	#!/usr/bin/env ruby

	# A simply utility to show character counts for each line of input and
	# highlight lines longer than 80 characters.
	#
	# Written as an example for http://jstorimer.com/2011/12/12/writing-ruby-scripts-that-respect-pipelines.html
	#
	# Examples:
	#
	# $ hilong Gemfile

	#!/usr/bin/env ruby

	require 'rubygems'
	require 'nokogiri'
	require 'net/http'

	# check_aws_status.rb
	# A nagios plugin for fetching RSS feeds from http://status.aws.amazon.com.
	# Source: https://gist.github.com/1604786
	# Written by Aaron Suggs: https://github.com/ktheory

	#!/bin/bash -ex

	# Paste this into ssh
	# curl -sL https://gist.github.com/andsens/2913223/raw/bootstrap_homeshick.sh \| tar -xzO \| /bin/bash -ex
	# When forking, you can get the URL from the raw (<>) button.

	### Set some command variables depending on whether we are root or not ###
	# This assumes you use a debian derivate, replace with yum, pacman etc.
	aptget='sudo apt-get'
	chsh='sudo chsh'

	#!/usr/bin/env lein-exec

	(println (group-by (fn [e] (if e true false)) [true, false, -1, 0, 1, 2, nil, (new Object), [], #{}, '(), [(new Object)], {}, {:foo, (new Object)}]))

	;;{true [true -1 0 1 2 #<Object java.lang.Object@4d8ce14a> [] #{} () [#<Object java.lang.Object@48ff4cf>] {} {:foo #<Object java.lang.Object@7114460>}], false [false nil]}

	// No commas
	def a = 'tim'
	def nocom = match( a ) {
	when 'dave' 'Hi Dave'
	when 'tim' 'Hi Tim'
	otherwise 'none of the above'
	}
	assert nocom == 'Hi Tim'

	// Commas

	import struct
	import sys

	def getBytes(fs, pos, numBytes):
	fs.seek(pos)
	byte = fs.read(numBytes)
	if (numBytes == 2):
	formatString = "H"
	elif (numBytes == 1):
	formatString = "B"