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Top Forums UNIX for Beginners Questions & Answers Combine two arrays. for in for ?.. Post 303042801 by nezabudka on Tuesday 7th of January 2020 12:38:39 PM
Old 01-07-2020
And I managed to throw out an extra command
Code:
eval echo -en "{$(tr ' ' , <file1)}' '{$(tr ' ' , <file2)}'\n'" |
    while read a b; do
        echo "$a $b"
    done

--- Post updated at 20:12 ---

Just how do I know the length of the string?
getconf LINE_MAX ?

--- Post updated at 20:22 ---

it yields out even with such a set
echo -en {1..30000}' '{a..z}'\n'

--- Post updated at 20:33 ---

Or this expression echo {1..5} does not expand into a string like this echo {1,2,3,4,5}

--- Post updated at 20:43 ---

issued all 30,000 lines
Code:
for((i=1;i<30000; i++)); do echo -n "$i "; done >file1
eval echo -en "{$(tr ' ' , <file1)}' '{a..z}'\n'" | while read a b; do echo "$a.$b."; done

Ok

--- Post updated at 21:38 ---

Code:
for i in $(eval echo {$(tr ' ' , <file1)}_{$(tr ' ' , <file2)}); do
    echo "index ${i%_*} value ${i#*_}"
done


Last edited by nezabudka; 01-07-2020 at 01:03 PM..
 

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echo(1B)					     SunOS/BSD Compatibility Package Commands						  echo(1B)

NAME
echo - echo arguments to standard output SYNOPSIS
/usr/ucb/echo [-n] [argument] DESCRIPTION
echo writes its arguments, separated by BLANKs and terminated by a NEWLINE, to the standard output. echo is useful for producing diagnostics in command files and for sending known data into a pipe, and for displaying the contents of envi- ronment variables. For example, you can use echo to determine how many subdirectories below the root directory (/) is your current directory, as follows: o echo your current-working-directory's full pathname o pipe the output through tr to translate the path's embedded slash-characters into space-characters o pipe that output through wc -w for a count of the names in your path. example% /usr/bin/echo "echo $PWD | tr '/' ' ' | wc -w" See tr(1) and wc(1) for their functionality. The shells csh(1), ksh(1), and sh(1), each have an echo built-in command, which, by default, will have precedence, and will be invoked if the user calls echo without a full pathname. /usr/ucb/echo and csh's echo() have an -n option, but do not understand back-slashed escape characters. sh's echo(), ksh's echo(), and /usr/bin/echo, on the other hand, understand the black-slashed escape characters, and ksh's echo() also understands a as the audible bell character; however, these commands do not have an -n option. OPTIONS
-n Do not add the NEWLINE to the output. ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWscpu | +-----------------------------+-----------------------------+ SEE ALSO
csh(1), echo(1), ksh(1), sh(1), tr(1), wc(1), attributes(5) NOTES
The -n option is a transition aid for BSD applications, and may not be supported in future releases. SunOS 5.11 3 Aug 1994 echo(1B)
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