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Questions - regex

Antlr lexer rule to tokenize float/double

I am trying to use this regex to tokenize a double in Antlr but apparently this regex is not getting understood by Antlr. Number: (-?)(0|([1-9][0-9]*))(\\.[0-9]+)?; Error: syntax error: '-' came as a...
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Node.JS

regex

antlr

antlr4

Votes: 0

Answers: 1

Latest Answer

ANTLR Lexer rules somewhat resemble REGEX, but definitely are not REGEXs. Try: Number: '-'?('0'|[1-9][0-9]*)('.'[0-9]+)?; Characters need to be enclosed in ' marks (with the exception of set notation...
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Mike Cargal

How to specify input locations parameter in dataflow pipeline?

I have a Dataflow template, that I originally created via Dataprep. Now I want to move away from Dataprep and use just Dataflow and schedule jobs using Cloud Scheduler. In GC console in Dataflow ->...
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DarkLeafyGreen

regex

google-cloud-dataflow

Votes: 0

Answers: 0

Improving the performance of an PCRE Regex Pattern

I have the below regex here which is written to support the PRCE/PRCE2 format. However, this throws the following error “Evaluation takes too long. Please check your regular expression.” Is there any ...
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Kamesh

regex

regex-lookarounds

pcre

regex-group

Votes: 0

Answers: 2

Latest Answer

You may try this refactored regex: \b(?>x|order(?>[\W_]*number)?[\W_]*)\d+(*SKIP)(*F)|(?=(?>[._ –-]*\d){9})(?>(?>9|6{3}|0{3}|(?>\d\D*){3}00|(?>\d\D*){5}0{4})(*SKIP)(*F)|\d(?>\D...
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anubhava

Created a regex to capture the email address out of each line of text in the txt file. What would be a more universal way of writing this?

I am trying to capture the email addresses out of each line of text out of a txt file on regex101.com. Capturing everything after the "@" symbol was easy enough, but I ran into trouble becau...
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JSG

regex

Votes: 0

Answers: 2

Latest Answer

\w[\w.]+\w@\w[\w.]*\.(com|miami)$ should match everything as well, as \w matches both digits and letters. Anyway, if email contained characters different from letters, digits and underscore _ though, ...
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cheesyMan

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