Re^2: Reading file and matching lines

[tbone654]

One liner

Prompt> perl -ne ' next if !/^E/; print $_; ' datafile

E99HEADER|006|001
E99INSSCH|052|
E99POLCOM|1||IIL|62|35119849249024|||||
E99INSFAC2|C00124||||||XAJX0727,YGAX0000,ZAAJ0203,VABA0018,WJZA1800|

[tbone654]

modified one-liner and data to test...

F98020A@LUS76E8012758 /cygdrive/c/package
$ perl -ne ' if (/^h/){print "error starts with h program exiting"; exit;} if (/^G/){exit;} next if !/^E/; print $_;' data
E99HEADER|006|001
E99INSSCH|052|
E99POLCOM|1||IIL|62|35119849249024|||||
E99INSFAC2|C00124||||||XAJX0727,YGAX0000,ZAAJ0203,VABA0018,WJZA1800|

F98020A@LUS76E8012758 /cygdrive/c/package
$ cat data  (note: changed the data to have E's after old)
Q165HWN0X001
Q165HWN0X002
Q165HWN0X003
E99HEADER|006|001
E99INSSCH|052|
E99POLCOM|1||IIL|62|35119849249024|||||
E99INSFAC2|C00124||||||XAJX0727,YGAX0000,ZAAJ0203,VABA0018,WJZA1800|
G35119849249024
h189SMA2
E99INSSCH|052|
E99POLCOM|1||IIL|62|35119849249024|||||
E99INSFAC2|C00124||||||XAJX0727,YGAX0000,ZAAJ0203,VABA0018,WJZA1800|