12-31-2013
awk -F"[><pipe>]" | split input file into fields using ">" and "<pipe>" as delimiters |
'NR==FNR{ | execute the code that follows for the first file (File2) |
sub(".$",":&",$0); | insert ":" before the last character in the line ($0) |
a[$0]=1} | populate "a" associative array with modified line as a key |
/^>/&&($2 in a){p=1} | set "p" to "1" if line starts with ">" and second field can be found in "a" array |
/^>/&&!($2 in a){p=0} | set "p" to "0" if line starts with ">" and second field cannot be found in "a" array |
p' | print line if "p" is greater than "0" |
File2 File1 | process File2 first, then File1 |
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