In this HackerRank Cut #3 problem-solution Using cut, multiple items can be retrieved with the same command. For instance, to return multiple columns from a line, there are two basic needs:
- Multiple columns that are not contiguous
- Multiple columns that are contiguous
The following commands split a string on dots, then return columns 1 and 3, then columns 1 through 3. The -d flag specifies the delimiter and the -f flag specifies the column(s) to return. Note that the delimiter is added back in to the results.
echo 100.200.300.400 |cut -d ‘.’ -f 1,3
100.300
echo 100.200.300.400 |cut -d ‘.’ -f 1-3
100.200.300
Read the man pages for concise documentation.
Display a range of characters starting at the 2nd position of a string and ending at the 7th position (both positions included).
Problem solution.
#!/bin/bash
while read line; do
if [[ $line == "" ]]; then
break;
else
echo $line | cut -c2-7
fi
done
Second solution.
cut -c2-7
Third solution.
cut -c2-7 $1
