About string.gsub

Solar2D Lua Language
#1

Hi , All 

I want to change (-3) to (0-3) , so I use the below code 

wordString = string.gsub(wordString, “^%%(-$”, “(0-”)  – ^ start , $ end 

But nothing happened. 

How to write the pattern ?

#2

First off, use http://regexr.com/ to find the expression you need.

Secondly, take a look at the documentation and do some googling. The answer to your question is almost certainly on stackoverflow.com already.

#3

are you just trying to replace “(” with “(0”?  with lua’s pattern syntax you’ll need to escape the parenthesis:

local source = "(-3)" local result = source:gsub( "%(", "%(0" ) print(result) --\> "(0-3)"
#4

Thanks , I am trying to replace “(-” with “(0-” , so it’s a string , so I am using ^$ to mark the Substring pattern .

#5

First off, use http://regexr.com/ to find the expression you need.

Secondly, take a look at the documentation and do some googling. The answer to your question is almost certainly on stackoverflow.com already.

#6

are you just trying to replace “(” with “(0”?  with lua’s pattern syntax you’ll need to escape the parenthesis:

local source = "(-3)" local result = source:gsub( "%(", "%(0" ) print(result) --\> "(0-3)"
#7

Thanks , I am trying to replace “(-” with “(0-” , so it’s a string , so I am using ^$ to mark the Substring pattern .