Parsing Time String: 'HH:MM:SS'

[jkgarner]

Has anybody got a code snippet that parses the time string 'HH:MM:SS'?
While, simply parsing the number out would be useful, and I would be grateful for even that, I really could use one that returns the time as a timestamp, which assumes current day.

I could take a bit of time to write one, but why reinvent the wheel?

I've got a lot of other code to write, specifically test code for what I've already written.

Since I am writing test code, does that mean I'm 'righting' my other code? [:D]

[KnightHawk75]

On the simple parse I'm sure there is easier way using string.match or gmatch but this one is handy for simple split function.

Code: Select all

 local str1 = "23:01:01"
 gKH={}
 gKH.base={}
 ----------
 -- These next two via Jack Taylor https://stackoverflow.com/questions/1426954/split-string-in-lua
 ----------
 -- gsplit: iterate over substrings in a string separated by a pattern
 -- 
 -- Parameters:
 -- text (string)    - the string to iterate over
 -- pattern (string) - the separator pattern
 -- plain (boolean)  - if true (or truthy), pattern is interpreted as a plain
 --                    string, not a Lua pattern
 -- 
 -- Returns: iterator
 --
 -- Usage:
 -- for substr in gsplit(text, pattern, plain) do
 --   doSomething(substr)
 -- end
 

Code: Select all

 function gKH.base:gsplit(text, pattern, plain)
   local splitStart, length = 1, #text
   return function ()
     if splitStart then
       local sepStart, sepEnd = string.find(text, pattern, splitStart, plain)
       local ret
       if not sepStart then
         ret = string.sub(text, splitStart)
         splitStart = nil
       elseif sepEnd < sepStart then
         -- Empty separator!
         ret = string.sub(text, splitStart, sepStart)
         if sepStart < length then
           splitStart = sepStart + 1
         else
           splitStart = nil
         end
       else
         ret = sepStart > splitStart and string.sub(text, splitStart, sepStart - 1) or ''
         splitStart = sepEnd + 1
       end
       return ret
     end
   end
 end
 

Code: Select all

 -- split: split a string into substrings separated by a pattern.
 -- 
 -- Parameters:
 -- text (string)    - the string to iterate over
 -- pattern (string) - the separator pattern
 -- plain (boolean)  - if true (or truthy), pattern is interpreted as a plain
 --                    string, not a Lua pattern
 -- 
 -- Returns: table (a sequence table containing the substrings)
 function gKH:split(text, pattern, plain)
   local ret = {}
   for match in gKH.base:gsplit(text, pattern, plain) do
     table.insert(ret, match)
   end
   return ret
 end
 

local retval = gKH:split(str1,":",true);
print(retval); -- use data as needed.

[jkgarner]

Thanks. I have a split string function, so I used that.