DataMystic

How do we select for (extract) a group of lines that either follow or precede a specific line, for example:

+ select the top line and the following 3 lines:
/* Important info follows this line */
apple banana cucumber
dog elephant fish
giraffe hippo igloo

+ select the 'Important Line' and the ...

How do we select (extract) lines beginning with (or, ending with) a specific character (letter, digit, symbol, etc.) or sequence of characters, for example:

+ select lines beginning/ending with the letter 'a'
+ select lines beginning/ending with 'abc'
+ select lines beginning/ending with '$*3abc'

How do we select (remove) all lines containing words with 3 letters or less, for example:
abc
def
ghi

How do we reduce repeating, or multiple consecutive, characters to a single character, for example:

---- (multiple hyphens) => - (single hyphen)
aaaa (multiple letters) => a (single letter)

I have seen plenty of ways to use 'or'; how do we implement 'and'?

For example, how do we:
+ select (extract) all lines containing a 'hyphen' and a 'comma'?
+ select (extract) all lines containing a 'hyphen' and the word "temp"?
+ select (extract) all lines containing only three (3) words followed ...

How can I select (extract) all lines that include hyphenated names, for example:
Osler-Weber
Turner-Wilson
abc-def

How can I select (extract) all lines with text ending with a comma (or, other symbol or punctuation), for example:
abc,
telecom,
georgia,


I know these issues are discussed in the "Help Section", but there just aren't enough examples in there to help me fully understand how use them. Please ...