SolarStrike Software

Posted: **Fri Mar 29, 2013 3:29 pm**

I started piling up various functions for file, table, and string manipulation, so I thought I'd share them with you all.

Current list of functions:

file_exists(file)
- Checks to see if a file exists
- returns true or false
lines_from(file)
- Creates a table from all lines in a file
- returns table
table_contains_element(table, element)
- Checks to see if a table contains the specified element
- returns true or false
table_find_word(table, word)
- Breaks down every element of a table into space-delimited strings, then checks all strings for the specified word
- returns true or false

Now part of addon_attackspeedzero. Link removed from this thread.

Posted: **Sat Mar 30, 2013 1:43 am**

file_exists(file) - Or you could use fileExists(file). http://www.solarstrike.net/wiki/index.p ... fileExists

lines_from(file) - It's a bit strange that this function accept the file handle. It would make more sense to give it the file name and have the function open the file.

Code: Select all

function lines_from(filename)
	local file = io.open(filename, "r")
	if not file then return {} end
	local lines = {}
	for line in io.lines(file) do
		lines[#lines + 1] = line
	end
	file:close()
	return lines
end

table_contains_element(table, element) - Or you could use table.contains(tab, value). http://www.solarstrike.net/wiki/index.p ... e.contains That's not a regular lua function. It's one added by Administrator.

Code: Select all

table_find_word(table, word) -

Why not just do a straight string match? It would make it a more versatile function. Why limit it to only single words? Eg.

Code: Select all

function table_find_word(table, word)
	for key,value in ipairs(table) do
		if string.find(value,word,1,true) do
			return true
		end
	end
	return false
end

Note: I added "1,true" to string.find so it disables the pattern matching which could cause problems with words that have special characters in them such as '-'. Generally if you are not using pattern matching you should disable it to make sure it doesn't inadvertently cause problems in the future.

I hope you find that useful.

Posted: **Mon Apr 01, 2013 1:59 pm**

Thanks for the feedback. I actually didn't know that those functions already existed, guess I should have read the wiki a little closer...

The code you wrote for lines_from is good also, the function I originally wrote calls the file_exists function so it's practically the same functionally.

table_find_word explodes a table into strings (which I am now seeing there is a table explode function in the wiki!) and then searches those for the word specified.

Finding a whole string would be table_contains_element.

So basically, what I'm getting from this is that I put a bunch of unnecessary work into my project...well, at least it was a LUA learning experience!

SolarStrike Software

LUA Table & File manipulation addon

LUA Table & File manipulation addon

Re: LUA Table & File manipulation addon

Re: LUA Table & File manipulation addon