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Assistance required with awk and regular expressions

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# 1  
Old 04-28-2014
Assistance required with awk and regular expressions
Hello there,

I am trying to get my head around the section below of a script we use that incorporates AWK and Regular Expressions.

Code:
{ match($0,"The broker[^.][^.]*[.]");print $1,$2,$3 ":", substr($0, RSTART,RLENGTH)}

I have a basic understanding of how match works, what I am struggling with is the ($0,"The broker[^.][^.]*[.]") section.

What is $0, and what does [^.][^.]*[.] signify?

Any help would be greatly appreciated!
# 2  
Old 04-28-2014
This line of awk code does two things:
  1. Look in the current input line ($0) for a sentence starting with The broker followed by one character that is not a period ([^.]) followed by zero or more characters that are not periods ([^.]*) followed by a period ([.]).
  2. Print the 1st input field followed by the output field separator (aka OFS) ($1,, the 2nd field followed by the OFS ($2,), the 3rd field followed by a colon followed by the OFS ($3 ":",) followed by the sentence found by the match() function if a sentence was found or an empty string if no sentence was found(substr($0, RSTART, RLENGTH)).
# 3  
Old 04-29-2014
Thank you Don, that is a great help!
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