#!/bin/bash

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#  Name   : fred_techniques
#  Author : Chris Koeritz
#  Rights : Copyright (C) 2010-$now by Author
##############
# Copyright (c) 2010-$now By Author.  This script is free software; you can
# redistribute it and/or modify it under the terms of the simplified BSD
# license.  See: http://www.opensource.org/licenses/bsd-license.php
# Please send updates for this code to: fred@gruntose.com -- Thanks, fred.
##############

# this script is a collection of helpful bash practices that unfortunately
# sometimes slip my mind when i need them.  it's intended to collect all the
# good bits so they don't slip away.  feel free to re-use them in your own
# code as needed.

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# clean for loops in bash:

for ((i=0; i < 5; i++)) do
  echo $i
done

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# removing an array element
# --> only works on arrays that have no elements containing a space character.

# define a 5 element array.
arr=(a b c d e)

# remove element 2 (the 'c').
removepoint=2

# set the array to slices of itself.
arr=(${arr[*]:0:$removepoint} ${arr[*]:(($removepoint+1))} )

# show the new contents.
echo ${arr[*]}
# shows: a b d e

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# store to a variable name by derefercing it.

# shows how you can store into a variable when you are given only its name.
function store_to_named_var()
{
  local name="$1"; shift
  eval ${name}=\(gorbachev "perestroikanator 12000" chernenko\)
}

declare -a ted=(petunia "butter cup" smorgasbord)
echo ted is ${ted[@]}
store_to_named_var ted
echo ted is now ${ted[@]}

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