How to regex for alphanumeric pattern with specific string

Question

Needle in haystack: Specific string followed by exact set of numbers

How can I search for ABC???? where ABC should be exactly that, but the ???? must be exactly four numbers, ideally followed by whitespace.

Illustrative examples:

• LHRJFKABC1234 233 <-- Has needle
• EABC123 LHRJFK <-- Does not have needle as only 3 numbers following ABC

Something tells me I need to search for string + something like (\d{4}) for the 4 numbers. But not sure quite how to puzzle it all together.

What I've found so far:

• Regular expression to match standard 10 digit phone number
• Regular Expression to match specific string followed by number?

Answer 1

For things like this I find an online checker like Rubular very handy.

Unless I'm misunderstanding, the regex ABC\d{4}\s should work for you. Do you need groupings (i.e. to match the 4-digit part)?

Try it out on Rubular here