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Full Discussion: Bash Passing An Array
Top Forums Shell Programming and Scripting Bash Passing An Array Post 302691499 by brsett on Friday 24th of August 2012 04:13:14 PM
Old 08-24-2012
Bash Passing An Array
Good grief so this should be easy. Passing an array as an argument to a function. Here is the sample code:

Code:
#/bin/bash

function foo {

  local p1=${1}
  local p2=(${2})
  local p3=${3}

  echo p1 is $p1
  echo p2 is $p2
  echo p3 is $p3

}

d1=data1
d2=data2
a=(bat bar baz)

foo "${d1}" "${a[@]}" "${d2}"

Obviously, it prints
data1
bat
bar

And what I want is:
data1
bat
data2

I would take
data1
bat bar baz
data2

As that would still be workable. I'm simply trying to stuff the array into the second argument somehow that isn't nasty and hard to understand. Obviously in the real example, there are multiple arrays being passed, so playing with the tokens isn't a great solution for me.
 

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bup-margin

bup-margin(1)						      General Commands Manual						     bup-margin(1)

NAME

       bup-margin - figure out your deduplication safety margin

SYNOPSIS

       bup margin [options...]

DESCRIPTION

       bup margin  iterates  through  all  objects  in	your  bup repository, calculating the largest number of prefix bits shared between any two
       entries.  This number, n, identifies the longest subset of SHA-1 you could use and still encounter a collision between your object ids.

       For example, one system that was tested had a collection of 11 million objects (70 GB), and bup margin returned 45.  That  means  a  46-bit
       hash  would be sufficient to avoid all collisions among that set of objects; each object in that repository could be uniquely identified by
       its first 46 bits.

       The number of bits needed seems to increase by about 1 or 2 for every doubling of the number of objects.  Since SHA-1 hashes have 160 bits,
       that  leaves 115 bits of margin.  Of course, because SHA-1 hashes are essentially random, it's theoretically possible to use many more bits
       with far fewer objects.

       If you're paranoid about the possibility of SHA-1 collisions, you can monitor your repository by running bup margin occasionally to see	if
       you're getting dangerously close to 160 bits.

OPTIONS

       --predict
	      Guess  the offset into each index file where a particular object will appear, and report the maximum deviation of the correct answer
	      from the guess.  This is potentially useful for tuning an interpolation search algorithm.

       --ignore-midx
	      don't use .midx files, use only .idx files.  This is only really useful when used with --predict.

EXAMPLE

	      $ bup margin
	      Reading indexes: 100.00% (1612581/1612581), done.
	      40
	      40 matching prefix bits
	      1.94 bits per doubling
	      120 bits (61.86 doublings) remaining
	      4.19338e+18 times larger is possible

	      Everyone on earth could have 625878182 data sets
	      like yours, all in one repository, and we would
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	      $ bup margin --predict
	      PackIdxList: using 1 index.
	      Reading indexes: 100.00% (1612581/1612581), done.
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SEE ALSO

       bup-midx(1), bup-save(1)

BUP

       Part of the bup(1) suite.

AUTHORS

       Avery Pennarun <apenwarr@gmail.com>.

Bup unknown-															     bup-margin(1)
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