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Full Discussion: Problem unary operator expected
Top Forums UNIX for Dummies Questions & Answers Problem unary operator expected Post 302381758 by Scott on Sunday 20th of December 2009 11:15:47 AM
Old 12-20-2009
Quote:
Originally Posted by f_o_555
I get the following error
./get_NE05: line 42: [: 4: unary operator expected
Line 42 corresponds to the second IF statement
Code:
while [ $I -le $2 ]
do
    echo ${STRING_NAME[$J]}
    J=1
    if [ $I -lt 10 ]; then
         EXT=0$I
    else
         EXT=$I
    fi
    while [ $J -le 4 ]
    do
        echo $I-$J
        #calculating last occurrence
        OCCURRENCE=`grep -io "${STRING_NAME[$J]}" ${1}-0${EXT}.out_bis| wc -l`
        if [ $J -eq 1 ]; then
            OLD_OCCURRENCE[$J]=${OCCURRENCE}
        fi
        if [ ${OCCURRENCE} -ne ${OLD_OCCURRENCE[$J]} ]; then
            echo "error" $OCCURRENCE[$J] $OLD_OCCURRENCE[$J]
        fi
        J=`expr $J + 1`
    done
    I=`expr $I + 1`
done

Any idea what I'm doing wrong?
Thanks,
Sarah
I don't think the second if statement is the problem. You would have a problem with the second while before that. J is already declared.

You are setting OLD_OCCURRENCE only when J is 1, but testing it for every value of J. That could be a problem.

On top of that you're treating OCCURRENCE both as a variable and as an array. Which is it?

And what is the starting value of I?
 

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LEARN ABOUT REDHAT

set_color

set_color(1)							       fish							      set_color(1)

NAME

       set_color - set_color - set the terminal color

set_color - set the terminal color
   Synopsis
       set_color [-v --version] [-h --help] [-b --background COLOR] [COLOR]

   Description
       Change the foreground and/or background color of the terminal. COLOR is one of black, red, green, brown, yellow, blue, magenta, purple,
       cyan, white and normal.

       o -b, --background Set the background color

       o -c, --print-colors Prints a list of all valid color names

       o -h, --help Display help message and exit

       o -o, --bold Set bold or extra bright mode

       o -u, --underline Set underlined mode

       o -v, --version Display version and exit

       Calling set_color normal will set the terminal color to whatever is the default color of the terminal.

       Some terminals use the --bold escape sequence to switch to a brighter color set. On such terminals, set_color white will result in a grey
       font color, while set_color --bold white will result in a white font color.

       Not all terminal emulators support all these features. This is not a bug in set_color but a missing feature in the terminal emulator.

       set_color uses the terminfo database to look up how to change terminal colors on whatever terminal is in use. Some systems have old and
       incomplete terminfo databases, and may lack color information for terminals that support it. Download and install the latest version of
       ncurses and recompile fish against it in order to fix this issue.

Version 1.23.1							  Sun Jan 8 2012						      set_color(1)
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