UNIX for Beginners Questions & Answers

firstplace
secondplace
secondpot

place
first
second

place 0
first 1
second 2

place 2
first 0
second 0

grep -of patternfile input >result

while read line; do echo "^$line"; done <file2 | grep -of- file1 | sort | uniq -c
      1 first
      2 second
while read line; do echo "$line\$"; done <file2 | grep -of- file1 | sort | uniq -c
      2 place

$ cat d
firstplace
secondplace
secondpot

a='first second place pot'

for o in $a; do
 echo $o at the beginning of line is `grep -Poce '^'$o'' d` time; echo $o at the second following the previous found is `grep -Poce '^\w+?'$o'' d` time;echo
done

first at the beginning of line is 1 time
first at the second following the previous found is 0 time

place at the beginning of line is 0 time
place at the second following the previous found is 2 time

second at the beginning of line is 2 time
second at the second following the previous found is 0 time

pot at the beginning of line is 0 time
pot at the second following the previous found is 1 time

FNR==NR {
  f2[$0]
  next
}
{
  for(i in f2) {
    if($0 ~ ("^"i))
      beg[i]++
    if($0 ~ (i"$")) {
      end[i]++
  }
}
}
END {
    print "begining"
    for(i in f2)
       print i,beg[i]+0

    print "\nend"
    for(i in f2)
       print i,end[i]+0
}