Difference between revisions of "String exploding"
(Created page with 'This function adds the ability to explode strings in Lua. <source lang="lua"> function string.explode(str, div) local o = {} while true do local pos = str:find(d…') |
m (Added missing properties for the category page, the function itself "pollutes" lua's string table though.) |
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| Line 3: | Line 3: | ||
<source lang="lua"> | <source lang="lua"> | ||
function string.explode(str, div) | function string.explode(str, div) | ||
| + | assert(type(str) == "string" and type(div) == "string", "invalid arguments") | ||
local o = {} | local o = {} | ||
while true do | while true do | ||
| − | local | + | local pos1,pos2 = str:find(div) |
| − | if not | + | if not pos1 then |
o[#o+1] = str | o[#o+1] = str | ||
break | break | ||
end | end | ||
| − | o[#o+1], | + | o[#o+1],str = str:sub(1,pos1-1),str:sub(pos2+1) |
end | end | ||
return o | return o | ||
| Line 28: | Line 29: | ||
print(original) --> foo bar | print(original) --> foo bar | ||
</source> | </source> | ||
| − | |||
[[Category:Snippets]] | [[Category:Snippets]] | ||
| + | {{#set:LOVE Version=any}} | ||
| + | {{#set:Description=Add the ability to explode strings. (return them as a table along defined divider substrings)}} | ||
Latest revision as of 19:11, 11 November 2016
This function adds the ability to explode strings in Lua.
function string.explode(str, div)
assert(type(str) == "string" and type(div) == "string", "invalid arguments")
local o = {}
while true do
local pos1,pos2 = str:find(div)
if not pos1 then
o[#o+1] = str
break
end
o[#o+1],str = str:sub(1,pos1-1),str:sub(pos2+1)
end
return o
end
Have an example:
tbl = string.explode("foo bar", " ")
print(tbl[1]) --> foo
-- since we added explode to the string table, we can also do this:
str = "foo bar"
tbl2 = str:explode(" ")
print(tbl2[2]) --> bar
-- to restore the original string, we can use Lua's table.concat:
original = table.concat(tbl, " ")
print(original) --> foo bar
