Resolved: How to modify phone number from a text file then print to the terminal using Sed and Extended Regular Expression?

Question:

I am trying to modify the phone number from a text file and display it the following ways using the Sed and Extended Regular Expression. I am new to Regular Expression so not sure what to do.

The first two numbers will be in parentheses and there are underscores after the second and sixth number. For example :(04)_1234_5678
The first number will become +61, followed by a space. For every three other digits, add a dash. For example +61 412-435-678

phone.txt

I have tried sed 'S/04/()/_1234_5678'

Answer:

Using sed

$ sed s'/\(.\(.\)\)\(\(..\)\(..\)\)\(\(.\)\(...\)\)/(\1)_\3_\6\n+61 \2\4-\5\7-\8/' input_file
(04)_1234_5678
+61 412-345-678
(04)_9266_9266
+61 492-669-266
(04)_5829_1324
+61 458-291-324
(04)_2719_3732
+61 427-193-732
(04)_2938_1912
+61 429-381-912
(04)_3920_1291
+61 439-201-291

or individually

$ sed s'/.\(...\)\(...\)\(...\)/+61 \1-\2-\3/' input_file
+61 412-345-678
+61 492-669-266
+61 458-291-324
+61 427-193-732
+61 429-381-912
+61 439-201-291

$ sed s'/\(..\)\(....\)/(\1)_\2_/' input_file
(04)_1234_5678
(04)_9266_9266
(04)_5829_1324
(04)_2719_3732
(04)_2938_1912
(04)_3920_1291

If you have better answer, please add a comment about this, thank you!

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