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Full Discussion: Bash shell script undefined array item value question
Top Forums Shell Programming and Scripting Bash shell script undefined array item value question Post 302875243 by lingjing on Tuesday 19th of November 2013 04:30:25 AM
Old 11-19-2013
Question Bash shell script undefined array item value question
Hello,

I'm new here. I test these expressions's value in my script :
(in centOS 6 )
Code:
#!/bin/bash
array['test']='something'

echo "############"
echo ${array["test1"]}
echo ${array["test2"]}
echo ${array["5"]}
echo "############"

The output result is :
Code:
#################
something
something

#################

Why the value of ${array["test1"]} and ${array["test2"]} is "something" instead of empty ?
Because they are not defined just as ${array["5"]}, however the value of ${array["5"]} is empty and it's correct.

Thanks in advance for your help.
Last edited by Franklin52; 11-19-2013 at 05:32 AM.. Reason: Please use code tags
 

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LEARN ABOUT SUNOS

script

script(1)							   User Commands							 script(1)

NAME

       script - make record of a terminal session

SYNOPSIS

       script [-a] [filename]

DESCRIPTION

       The  script  utility  makes a record of everything printed on your screen. The record is written to filename. If no file name is given, the
       record is saved in the file typescript. See WARNINGS.

       The script command forks and creates a sub-shell, according to the value of $SHELL, and records the text from this session. The script ends
       when the forked shell exits or when Control-d is typed.

OPTIONS

       The following option is supported:

       -a	Appends the session record to filename, rather than overwriting it.

NOTES

       script places everything that appears on the screen in filename, including prompts.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+
       |CSI			     |Enabled			   |
       +-----------------------------+-----------------------------+

SEE ALSO

       attributes(5)

WARNINGS

       script  can  pose  a  security risk when used in directories that are writable by other users (for example, /tmp), especially when run by a
       privileged user, that is, root. Be sure that typescript is not a link before running script.

SunOS 5.10							    30 Jan 2004 							 script(1)
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