WoWInterface - string.gsub() and regular expression

WoWInterface (https://www.wowinterface.com/forums/index.php)

- AddOn Help/Support (https://www.wowinterface.com/forums/forumdisplay.php?f=3)

- - string.gsub() and regular expression (https://www.wowinterface.com/forums/showthread.php?t=58565)

Platine

01-24-21 03:44 PM

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 ?

briskman3000

01-24-21 04:15 PM

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, "%,", ""), "%.", "");

Seerah

01-24-21 05:11 PM

Lua Code:

string.gsub("12,345", ",", "")

Substitute the comma with nothing (taking it out).

Kanegasi

01-24-21 05:18 PM

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:

local text = "The number 45,678 is big, but 1,234 is small."
text = string.gsub(text, "(%d),(%d)", "%1%2")
print(text)
-- 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.

Platine

01-25-21 09:17 AM

Yes, this is the solution.

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

Thanks, Kanegasi.

Seerah

01-25-21 03:53 PM

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.)

Vrul	01-25-21 05:09 PM

Quote:

Originally Posted by Seerah (Post 338380)

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."

Seerah

01-26-21 02:00 PM

Of course. I wasn't thinking that he wanted to pass that entire string through it.

All times are GMT -6. The time now is 08:09 AM.