Beefy Boxes and Bandwidth Generously Provided by pair Networks
Think about Loose Coupling

Re^3: Iterator to parse multiline string with \\n terminator

by smls (Friar)
on Oct 06, 2013 at 11:47 UTC ( #1057141=note: print w/replies, xml ) Need Help??

in reply to Re^2: Iterator to parse multiline string with \\n terminator
in thread Iterator to parse multiline string with \\n terminator

The difference is that redo does not re-evaluate the loop condition (in this case: "(<DATA>)", which fetches the next line) before evaluating the loop body again, whereas next does.

This is why in jwkrahn's solution, the next line is fetched manually before calling redo:

$_ .= <$fh>;

The advantage of jwkrahn's solution with redo, is that the implicit variable $_ can be used to store the complete multiline record.

The advantage of kcott's solution with next, is that there is only one place where the <> operator for fetching the next line is used (inside the loop condition) - but re-evaluating the the loop condition also resets $_, so in this case a custom variable needs to be declared above the loop to store the current record.

Log In?

What's my password?
Create A New User
Node Status?
node history
Node Type: note [id://1057141]
[stevieb]: w00t! my i2c module actually works, and it works well!

How do I use this? | Other CB clients
Other Users?
Others exploiting the Monastery: (3)
As of 2017-06-22 22:49 GMT
Find Nodes?
    Voting Booth?
    How many monitors do you use while coding?

    Results (531 votes). Check out past polls.