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Top Forums Shell Programming and Scripting check if contents of an array is empty Post 302598989 by h0ujun on Thursday 16th of February 2012 01:23:59 AM
Old 02-16-2012
check if contents of an array is empty

hi,

I have this array

Code:
a=("" "" "")

Is there a command that I can use to check if all members of the are empty?
I really don't like to use for or while loop.

thanks!

---------- Post updated at 02:23 PM ---------- Previous update was at 02:15 PM ----------

wait, I got it already

Code:
i=echo ${a[@]} | wc -w
if [ $i -eq 0] ; then
    echo empty
fi

anyway, any other solutions will be appreciated
 

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SPLIT(1)								FSF								  SPLIT(1)

NAME
split - split a file into pieces SYNOPSIS
split [OPTION] [INPUT [PREFIX]] DESCRIPTION
Output fixed-size pieces of INPUT to PREFIXaa, PREFIXab, ...; default PREFIX is `x'. With no INPUT, or when INPUT is -, read standard input. Mandatory arguments to long options are mandatory for short options too. -a, --suffix-length=N use suffixes of length N (default 2) -b, --bytes=SIZE put SIZE bytes per output file -C, --line-bytes=SIZE put at most SIZE bytes of lines per output file -l, --lines=NUMBER put NUMBER lines per output file --verbose print a diagnostic to standard error just before each output file is opened --help display this help and exit --version output version information and exit SIZE may have a multiplier suffix: b for 512, k for 1K, m for 1 Meg. AUTHOR
Written by Torbjorn Granlund and Richard M. Stallman. REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>. COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc. This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU- LAR PURPOSE. SEE ALSO
The full documentation for split is maintained as a Texinfo manual. If the info and split programs are properly installed at your site, the command info split should give you access to the complete manual. split (coreutils) 4.5.3 February 2003 SPLIT(1)
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