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Shell Programming and Scripting

calculate number of strings in a variable

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# 1  
Old 12-30-2008
calculate number of strings in a variable
Hi all

I have a variable called "variable" and is of the form
variable ="AAA BBB CCC DDD" {basically it has values separated by spaces}

What is the simplest way to check if "variable" has more that one value in its list?

Thanks.
# 2  
Old 12-30-2008
Code:
echo ${variable} | grep -q ' '
if [[ $? -eq 0 ]] ; then ...

# 3  
Old 12-30-2008
Quote:
Originally Posted by felixmat1
Hi all

I have a variable called "variable" and is of the form
variable ="AAA BBB CCC DDD" {basically it has values separated by spaces}

What is the simplest way to check if "variable" has more that one value in its list?

Code:
set -f
set -- $variable
printf "Number of words: %d\n" $#

# 4  
Old 12-30-2008
Using awk -

echo $variable | awk ' { if ( NF > 1 ) print "Yes"; else print "No" } '
# 5  
Old 01-01-2009
Try:

Code:
echo $var | wc -w

or,

Code:
set $var
echo $#

# 6  
Old 01-01-2009
This works for bash and ksh93
Code:
variable="AAA BBB CCC DDD"
if [[ $variable =~ ' ' ]]
then
    printf "found space\n"
fi

# 7  
Old 01-01-2009
Quote:
Originally Posted by dennis.jacob
Code:
set $var
echo $#


That may fail if $var contains wildcard characters or if it begins with a hyphen.
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