(c) David Rook 2010 - released under Simplified BSD 2-clause License

This project is a collection of simple go programs. Each one should compile and run with Go 1. If you're still using r60.3 or earlier then it might or might not work without conversion. They were useful to me when learning go and I still look at them when I need to refresh my memory on how certain things work. If you have go installed they should build without problems. If you don't then they can still be copied into the go "playground" at golang.org for experimentation.

The programs in alphabetic order:

1. after.go

• april15c.go

  • allocating very large blocks of RAM

• bigInt.go rho.go

  • calculate common divisors of large numbers

• binaryEncode.go

  • empty interface array

• bugBounce.go

  • interfaces

• byteOrder.txt is a go snip by Rob Pike

  • simple slice to int conversions, Big&Little endian examples

• call.go, call_test.go

  • build & run vs test

• cgo.go

  • currently failing - what changed? or was it wrong to start?
  • demonstrate how to call a C program from go code

• channelTest.go

  • using chan to alternate between to goroutines "without locks"

• closure.go, closure2.go

  • functions that return functions
  • see also static.go

• debug.go

  • variadic parameters
  • attaching Printf methods to boolean variables

• env.go, env_test.go

• eval.go

  • variable is a function

• file.go

  • read and write to text files

• fileinfo.go

  • build flags
  • syscall to get the "other" info about a file

• filter.go, check.go

  • gather args from keyboard

• flags.go

  • get arguments from command line
  • doesn't process the flags at all - need to expand it a bit +++

• fourteen.go - 14 bit floating point - not mine

  • originally done for some specialized hardware I believe

• freeport.go

  • get OS to give you a free port number for server
  • String() method

• funcParm.go, funcParm_test.go

  • using functions as parameters to functions

• goroutine.go

  • channel as throttle to limit resource consumption (CPU here)
  • waitgroup

• ifAddr.go

  • list the network interfaces available to the program

• interface

  • demonstrate functions that take multiple types as arguments

• inventory.go

  • trivial inventory example (poor example)

• json.go *

• letterCount.go

  • count occurrences of letters in a buffer
  • returns an array of ints

• log.go

  • illustrate some gotchas

• map.go

  • map inquiry with and without exist test
  • remove an element of a map using delete
  • how to sort map keys

• md5.go, md5File.go (not built)

  • example of how hash and crypto/md5 work together

• memAvail.go

  • reads /proc/meminfo - not that useful

• memoize.go

  • replace a function with one that memorizes previous results
  • can sometimes speed up results dramatically

• nested.go by Jesse McNelis

  • ip address checked before serving

• pause.go, readInput.go

  • raw mode tty input
  • exec.Command(...
  • several examples - some raw tty, some not

• pi.go - calculate some digits of pi - not really working - too few digits

• pipe.go

  • goroutines to read and write
  • sleep

• queue.go

  • typical ops for queue data structure

• random.go

  • floating random values

• range.go

  • range examples
  • empty return parameters
  • array initializer syntax

• re2.go

  • collection pattern matching works

• readRandom.go

  • reads from random number source

• rpc

  • tiny client server demo with RPC

• runCmd.go

  • execute system level commands
  • output of commands retained in local buffer

• scrypt scrypter.go

  • how to use crypto/scrypt
  • compare blocks using bytes.Compare()

• sha256.go

  • sha256 of buffer or file

• shuffle.go

  • introduce disorder into an array

• sleeper.go

  • rand - random number generator
  • goroutine - anon func
  • goroutine - named func
  • select with timeout limit

• socket contains LocalSocket.go, UnixSocket.go

  • trivial client server examples

• sorter.go

  • custom sort for Ant AI challenge

• stack.go

  • push/pop stack data structure

• stardate.go

  • print date as decimal year
  • example with multiple command line flags

• static.go, see also closure.go

• struct.go

  • examples of initialization - could be improved

• tar.go

• ticker.go - time.Tick(duration) demo

• treewalk.go

• twoDArray

  • initialize a two-D array

• web-passwd.go

  • borrowed password checker

Since there are multiple subdirectories the easiest installation is

cd DestinationDirectory

git clone https://github.com/hotei/simple.git

• Simple, usually just a single topic being demonstrated
• The typing has already been done :-)

• [go language reference] 1
• [go standard library package docs] 2
• [Source for program] 3

Comments can be sent to hotei1352@gmail.com or to "hotei" at github.com.

The programs contained within the "hotei/simple" github project are released with the following Simplified BSD License:

Copyright (c) 2010-2015 David Rook. All rights reserved.

Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

Documentation (c) 2015 David Rook

// EOF README-simple.md (this is a markdown document and tested OK with blackfriday)