split works fine, provided you really want to split on the "ms" substring.

this however: 

$raw_data=<DATA>;
while (<DATA>) {

foreach ($raw_data) {

[download]
is almost certainly wrong and at least very confusing.

you probably want: 

while (<DATA>) {
  my @new_data = split /ms/;
  # do stuff
}

[download]
Also note that the DATA file handle is special. you may want to use some other name if you're reading from some random file.

"What should it profit a man, if he should win a flame war, yet lose his cool?"

In reply to Re: Read File into array and split by Joost
in thread Read File into array and split by tokyobuddha

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