Hello Programmers, In this post, you will know how to solve the ‘Sed’ command #5 HackerRank Solution. This problem is a part of the HackerRank Linux Shell Series.
One more thing to add, don’t directly look for the solutions, first try to solve the problems of Hackerrank by yourself. If you find any difficulty after trying several times, then you can look for solutions.
‘Sed’ command #5 HackerRank Solution
Objective
Sed is a popular utility which enables quick parsing and transformation of text.
Here are some very simple examples of sed in action.
Substitute the first occurrence of ‘editor’ with ‘tool’.
$:~/hackerrank/bash/grep/grep1$ echo “My favorite programming editor is Emacs. Another editor I like is Vim.” | sed -e s/editor/tool/
My favorite programming tool is Emacs. Another editor I like is Vim.
Substitute all the occurrences of ‘editor’ with ‘tool’.
$:~/hackerrank/bash/grep/grep1$ echo “My favorite programming editor is Emacs. Another editor I like is Vim.” | sed -e s/editor/tool/g
My favorite programming tool is Emacs. Another tool I like is Vim.
Substitute the second occurrence of ‘editor’ with ‘tool’.
$:~/hackerrank/bash/grep/grep1$ echo “My favorite programming editor is Emacs. Another editor I like is Vim.” | sed -e s/editor/tool/2
My favorite programming editor is Emacs. Another tool I like is Vim.
Highlight all the occurrences of ‘editor’ by wrapping them up in brace brackets.
$:~/hackerrank/bash/grep/grep1$ echo “My favorite programming editor is Emacs. Another editor I like is Vim.” | sed -e s/editor/{\&}/g
My favorite programming {editor} is Emacs. Another {editor} I like is Vim.
Task
Given an input file, with N credit card numbers, each in a new line, your task is to reverse the ordering of segments in each credit card number. Assume that the credit card numbers will have 4 space separated segments with 4 digits each.
If the original credit card number is 1434 5678 9101 1234, transform it to 1234 9101 5678 1434.
Input Format
N credit card numbers, each in a new line, credit card numbers will have 4 space separated segments with 4 digits each.
Constraints
1 <= N <= 20
However, the value of N does not matter while writing your command.
Output Format
N lines, each containing a credit card number with the ordering of its segments reversed.
Sample Input
1234 5678 9101 1234
2999 5178 9101 2234
9999 5628 9201 1232
8888 3678 9101 1232
Sample Output
1234 9101 5678 1234
2234 9101 5178 2999
1232 9201 5628 9999
1232 9101 3678 8888
Explanation
The order of the four segments in the (input) credit card numbers have been reversed.
‘Sed’ command #5 HackerRank Solution
sed -E 's/([0-9]{4}) ([0-9]{4}) ([0-9]{4}) ([0-9]{4})/\4 \3 \2 \1 /g' Note: This problem (‘Sed’ command #5) is generated by HackerRank but the Solution is Provided by BrokenProgrammers. This tutorial is only for Educational and Learning purposes.