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Creating a blank string of a specified size

 
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# 1  
Old 01-19-2012
Creating a blank string of a specified size
I want to have a string which has n blank spaces

For example
Code:
set N = 3
create str = "   "

So the length depends on the value of N. I am in tcsh.
# 2  
Old 01-19-2012
Code:
perl -e 'print " "x'$N

# 3  
Old 01-19-2012
I have tried this for getting 20 A's and am getting a problem

Code:
echo 20 | awk 'BEGIN{while (a++<$1) s=s"A"; print s}'

# 4  
Old 01-19-2012
What problem are you getting?
# 5  
Old 01-19-2012
I sorted out the problem of doing the mistake of using $1, but now the string is still a single blank

Code:
set nBlk = "5"
set blankStr = `awk -v n=$nBlk 'BEGIN{while (a++<n) s=s" "; print "."s"."}'`
echo "$blankStr"

---------- Post updated at 11:51 AM ---------- Previous update was at 11:40 AM ----------

Quote:
Originally Posted by Corona688
What problem are you getting?
I provide this example to help.

The table is not shifted when using " " instead of "B".

Code:
#!/bin/tcsh

set msg = "-v,--verbose=level -nv,--no-verbose -q,--quiet -u,--usage -e,--examples -h,--help"

echo ""

set nBlk = "5"
set blankStr = `awk -v n=$nBlk 'BEGIN{while (a++<n) s=s"B"; print s}'`
echo "blankStr = .$blankStr."

echo ""

set len = ${%msg}
if ($len > 0) then
  printf "%-s\t" $msg | fold -s -w 100 | awk '{sub(/^[ \t]+/, "")};1'  \
    | awk -v s=$blankStr '{gsub(/,/,", ");print s $0}'
endif

echo ""

set len = ${%msg}
if ($len > 0) then
  printf "%-s\t" $msg | fold -s -w 100 | awk '{sub(/^[ \t]+/, "")};1'  \
    | awk -v s=$blankStr '{gsub(/,/,", ");print s $0}' \
    | awk '{gsub(/B/," ");print}'
endif

echo ""
echo "nBlk = $nBlk"
set blankStr = `awk -v n=$nBlk 'BEGIN{while (a++<n) s=s"B"; print s}'`
echo "blankStr = .$blankStr."
set blankStr = `awk -v n=$nBlk 'BEGIN{while (a++<n) s=s" "; print s}'`
echo "blankStr = .$blankStr."

set len = ${%msg}
if ($len > 0) then
  printf "%-s\t" $msg | fold -s -w 100 | awk '{sub(/^[ \t]+/, "")};1'  \
    | awk -v s=$blankStr '{gsub(/,/,", ");print s $0}'
endif

echo ""

Last edited by kristinu; 01-19-2012 at 01:12 PM..
 
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