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How to match multi-row data using regular expression R programming


How to match multi-row data using regular expression R programming

By : Verenka
Date : November 19 2020, 03:59 PM
it fixes the issue I import a txt document into R using readLines, but the document is transformed into a charactor vector, namely,every element in the vector denote a line in the txt document, so that I cannot use regular expression to match the multi-row data.How to sove this problem? , The below command would fetch the lines between ID and DE
code :
> f <- paste(readLines("file"), collapse="\n")
> m <- gregexpr("(?m)^ID.*\\n\\K[\\S\\s]*?(?=\\nDE)", f, perl=TRUE)
> regmatches(f, m)
[[1]]
[1] "\nXX\n\nAC   MI0000001;\n\nXX"
> m <- gregexpr("(?s)^ID.*?\\nDE", f, perl=TRUE)
> regmatches(f, m)
[[1]]
[1] "ID   cel-let-7         standard; RNA; CEL; 99 BP.\n\nXX\n\nAC   MI0000001;\n\nXX\nDE"


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What regular expression would match this data?

What regular expression would match this data?


By : iler
Date : March 29 2020, 07:55 AM
This might help you (Updated post specifically for a Javascript solution.)
In Javascript, your code might look like this:
code :
if (data.match(/<script[^>]+id="JSBALLOONS">([\S\s]*?)<\/script>/)) {
    inner_script = RegExp.$1;
}
what is regular expression for matching single line with multi match?

what is regular expression for matching single line with multi match?


By : Amri Foued
Date : March 29 2020, 07:55 AM
it fixes the issue , This should work:
code :
while ($str =~ /\"Address\":\S+\"(.*?)\"/g) {
      print "Address = $1\n";
}
Regular expression to match content until multi-character string

Regular expression to match content until multi-character string


By : user3187332
Date : March 29 2020, 07:55 AM
With these it helps I've got defective input coming in that looks like this... , I think you actually want positive lookahead. It's really not bad:
code :
/^([^<]+)(?=<p)/
> var re = /^([^<]+)(?=<p)/g;

> 'foo<p>bar</p>'.replace(re, '<p>$1</p>');
  "<p>foo</p><p>bar</p>"

> 'foo <b>bold</b><p>bar</p>'.replace(re, '<p>$1</p>')
  "foo <b>bold</b><p>bar</p>"
> var re1 = /^(.+?(?=<p))/g,
      re2 = /^([^<]+)/g,
      s = '<p>$1</p>';

> 'foo<p>bar</p>'.replace(re1, s).replace(re2, s);
  "<p>foo</p><p>bar</p>"

> 'foo'.replace(re1, s).replace(re2, s);
  "<p>foo</p>"

> 'foo <b>bold</b><p>bar</p>'.replace(re1, s).replace(re2, s);
  "<p>foo <b>bold</b></p><p>bar</p>"
> var re3 = /^(.+?(?=<p)|[^<]+)/g,
      s = '<p>$1</p>';

> 'foo<p>bar</p>'.replace(re3, s)
  "<p>foo</p><p>bar</p>"

> 'foo'.replace(re3, s)
  "<p>foo</p>"

> 'foo <b>bold</b><p>bar</p>'.replace(re3, s)
  "<p>foo <b>bold</b></p><p>bar</p>"
How to match all multi- and single line messages with a regular expression in python

How to match all multi- and single line messages with a regular expression in python


By : Kallis
Date : March 29 2020, 07:55 AM
Hope this helps Add |\Z to your lookahead:
code :
^([0-9]{4}-[0-9]{2}-[0-9]{2}.*?)(?=^[0-9]{4}-[0-9]{2}-[0-9]{2}|\Z)
how to match multi email by regular expression?

how to match multi email by regular expression?


By : jaya J
Date : March 29 2020, 07:55 AM
it fixes the issue re.search only finds the first occurrence.
From https://docs.python.org/2/library/re.html
code :
import re
str = "my email are 670578362@qq.com and 178263745@163.com"
for r in re.finditer(r'[A-Za-z0-9\.+_-]+@[A-Za-z0-9]+\.[a-zA-Z]+',str):
    print r.group()
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