Difference between revisions of "String exploding"

(added default argument)
m (Added missing properties for the category page, the function itself "pollutes" lua's string table though.)
 
(10 intermediate revisions by 3 users not shown)
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<source lang="lua">
 
<source lang="lua">
 
function string.explode(str, div)
 
function string.explode(str, div)
    div = div or ' ' -- Space usually is the most common separator
 
 
     assert(type(str) == "string" and type(div) == "string", "invalid arguments")
 
     assert(type(str) == "string" and type(div) == "string", "invalid arguments")
 
     local o = {}
 
     local o = {}
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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 21:11, 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