A handful of useful "one-liners"

A handful of useful "one-liners"

1. END{print NR}
2. NR==10
3. {print $NF}
4. {field=$NF}
END{print field}
5. NF>4
6. $NF>4
7. {nf=nf+NF}
END {print nf}
8. /Beth/ {nl=nl+1} # �� line�� ���� Beth�� �����
END {print ln}
9. $1>max {max=$1; maxl=$0}
END{print max, maxl}
10. NF>0
11. length($0)>80
12. {print NF, $0}
13. {temp=$1; $1=$2;$2=temp;print}
15. {$1=NR; print}
16. {$2=""; print}
17. {for(i=NF;i>0;i=i-1) printf("%s ",$i)
printf("\n") }
18. {sum=0
for(i=1;i<=NF;i=i+1) sum=sum+$i
print sum }
19. {for(i=1;i<=NF;i=i+1) sum=sum+$i }
END{ print sum}
20. {for(i=1;i<=NF;i=i+1)
if($i<0) $i=-$i
print }