Query on decision making... Post: 302475592

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Top Forums Shell Programming and Scripting Query on decision making... Post 302475592 by biglau on Monday 29th of November 2010 08:28:27 AM

11-29-2010

Registered User

Query on decision making...

Code:

is_number()
 {
         echo $1|egrep '^[1-9][0-9]*$' 2>&1 1>/dev/null
         return $?
 }

why the following snippet always give an output as "no" and never "yes" whatever the parameter I give to function is_number?

Code:

if [[ `is_number 0100` ]]; then echo yes; else echo no; fi

In addition, the function is_number() is working fine as per the below command line:

Code:

linux-hhaq:/apps/informatica/current/pmserver/tes/scripts # is_number 100
linux-hhaq:/apps/informatica/current/pmserver/tes/scripts # echo $?
0
linux-hhaq:/apps/informatica/current/pmserver/tes/scripts # is_number 0100
linux-hhaq:/apps/informatica/current/pmserver/tes/scripts # echo $?
1
linux-hhaq:/apps/informatica/current/pmserver/tes/scripts #

Last edited by Scott; 11-29-2010 at 09:42 AM.. Reason: Code tags, please...

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ideviceinstaller(1)					      General Commands Manual					       ideviceinstaller(1)

NAME

       ideviceinstaller - Manage iDevice apps

SYNOPSIS

       ideviceinstaller [OPTIONS]

DESCRIPTION

       Allows to install, upgrade, uninstall, archive, restore and enumerate installed or archived apps on iDevices.

OPTIONS

   General options:
       -d, --debug
	      enable communication debugging.

       -U, --uuid UUID
	      target specific device by its 40-digit device UUID.

       -h, --help
	      prints usage information

   Commands:
       -l, --list-apps
	      list apps installed on the device.

	      Additional options:

	      -o list_user
		     list user apps only (apps installed by the user) This is the default.

	      -o list_system
		     list system apps only (apps available from the system firmware)

	      -o list_all
		     list all types of apps

	      -o xml print output in xml format (PList)

       -i, --install ARCHIVE
	      install app from a package file specified by ARCHIVE.

       -u, --uninstall APPID
	      uninstall app specified by APPID.

       -g, --upgrade APPID
	      upgrade app specified by APPID.

       -r, --restore APPID
	      restore archived app specified by APPID.

       -L, --list-archives
	      list archived applications on the device.

	      Additional options:

	      -o xml print output in xml format (PList)

       -a, --archive APPID
	      archive app specified by APPID.

	      Additional options:

	      -o uninstall
		     uninstall the package after making an archive

	      -o app_only
		     archive application data only

	      -o copy=PATH
		     copy the app archive to directory PATH when done

	      -o remove
		     only valid when copy=PATH is used: remove after copy

       -R, --remove-archive APPID
	      remove app archive specified by APPID.

AUTHOR

       This manual page was written by Martin Szulecki.

															       ideviceinstaller(1)

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