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string.gsub() and regular expression - WoWInterface
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01-24-21, 03:44 PM   #1
Platine
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string.gsub() and regular expression

I need to get text without a comma in numbers using string.gsub() function:

Code:
local text = "The number 45,678 is big, but 1,234 is small."
text = string.gsub(text, "[0-9],[0-9]", "???")
print (text)
-- should be: "The number 45678 is big, but 1234 is small."
What should be the third parameter in the string.gsub() function ?
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01-24-21, 04:15 PM   #2
briskman3000
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back in legion, this is how I got the numbers, and only the numbers, out of the artifact power item tooltips without seperators. You can modify this to do what you want (I would guess).

Code:
appower = string.match(_G[self:GetName().."TextLeft"..i]:GetText(), "%d+%,?%.?%s?%d*");						
appower = string.gsub(string.gsub(appower, "%,", ""), "%.", "");
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01-24-21, 05:11 PM   #3
Seerah
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Lua Code:
  1. string.gsub("12,345", ",", "")
Substitute the comma with nothing (taking it out).
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01-24-21, 05:18 PM   #4
Kanegasi
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Lua does not use regex. It has a similar but limited engine:

https://wow.gamepedia.com/Pattern_matching

In this case, since I assume you want to keep the comma in the center, you need %d with parenthesis and then %# in the replacement argument

Lua Code:
  1. local text = "The number 45,678 is big, but 1,234 is small."
  2. text = string.gsub(text, "(%d),(%d)", "%1%2")
  3. print(text)
  4. -- should be: "The number 45678 is big, but 1234 is small."

The %d,%d captures any comma surrounded by numbers, the parenthesis "saves" the two numbers, and %1%2 outputs those two numbers in place without the comma.

Last edited by Kanegasi : 01-24-21 at 06:18 PM.
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01-25-21, 09:17 AM   #5
Platine
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Yes, this is the solution.

text = string.gsub(text, "(%d),(%d)", "%1%2")

Thanks, Kanegasi.
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01-25-21, 03:53 PM   #6
Seerah
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Is there any benefit to doing it that way? The method briskman3000 and I posted seems about twice as fast when benchmarking. (Though the processing time probably doesn't matter much for the OP's needs.)
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01-25-21, 05:09 PM   #7
Vrul
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Originally Posted by Seerah View Post
Is there any benefit to doing it that way? The method briskman3000 and I posted seems about twice as fast when benchmarking. (Though the processing time probably doesn't matter much for the OP's needs.)
The OP only wanted commas between numbers removed, not all commas.

Using the OP's sample text:
Code:
"The number 45,678 is big, but 1,234 is small."
Kanegasi's result:
Code:
"The number 45678 is big, but 1234 is small."
Other result:
Code:
"The number 45678 is big but 1234 is small."
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01-26-21, 02:00 PM   #8
Seerah
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Of course. I wasn't thinking that he wanted to pass that entire string through it.
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WoWInterface » AddOns, Compilations, Macros » AddOn Help/Support » string.gsub() and regular expression

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