how to update a specific line in a text file

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Vahid
Vahid 2012-6-30
Hi folks,
I am going to read a formatted text file and update ONLY a line of that which can be in middle of text file. e.g. if contents of my text file are as the following:
test1 a1 a2 a3
test2 b1 b2 b3
test3 c1 c2 c3
I just want to update the the second line of this text file with new values like:
test2 f1 f2 f3
without changing other two lines so that I end up with
test1 a1 a2 a3
test2 f1 f2 f3
test3 c1 c2 c3
Is there any way to do so?
thanks in advance, --V

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采纳的回答

Yash
Yash 2012-6-30
read the text file and them make changes to the array and then rewrite it
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Vahid
Vahid 2012-6-30
编辑：Vahid 2012-6-30
thanks so much! I was thinking to apply exactly same way to resolve my problem:
  • first, read the data from the text file and save the data in an array
  • second, changing the desired element in the array
  • third, writing the updated array to the text file
It should perfectly work ;D

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Walter Roberson
Walter Roberson 2012-6-30

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