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Lua Regex with groups — Gideros Forum
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    Lua Regex with groups

    tpropertproper Member
    edited January 2019 in General questions
    If I have a string like this:
    local s = "X=5 and Y=2 and X=2 and Z = 4 and B = 4 and X = 9"
    How can I parse out all the X values? In other languages you do something along the lines of:
    pattern = (X=(\d{1,10}))
    and then get all the groups that match.

    How can I do this in Gideros Lua?
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    Comments

    • tpropertproper Member
      Figure it out...goes something like this:
      local read_in = "1,2,3"
 
local numbers = {}
local cnt = 0
for n in string.gmatch (read_in, "%d+") do
  numbers[cnt] = n
  print("match: " ..n)
  cnt = cnt + 1
end

      Likes: Apollo14, SinisterSoft

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    • SinisterSoftSinisterSoft Maintainer
      You should do an article for the blog on this...
      Coder, video game industry veteran (since the '80s, ❤'s assembler), arrested - never convicted hacker (in the '90s), dad of five, he/him (if that even matters!).
      https://deluxepixel.com
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    • tpropertproper Member
      I'm not sure I understand the code well enough to write an article. I only understood it enough to do some simple things.

      In the end, I was using the regex to parse a json object but I found LunaJson which does it for me. So I ended up using that. But I am glad I found the regex stuff.
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    • piepie Member
      Accepted Answer
      @tproper if you just need to read and write json files gideros has a native json plugin http://docs.giderosmobile.com/reference/plugin/json
      From the project tree on the left, right-click on Plugins and add it - keep in mind that if you need to test on device you will need to build your own player.
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    • hgy29hgy29 Maintainer
      Json plugin is usually included in prebuilt players

      Likes: pie

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    • tpropertproper Member
      Oh, wow. Cool. I'll look into that.
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