Difference between revisions of "love.filesystem.lines"
(→Examples: Less confusing example. Changed separation character from tab to comma. Cleanup.) |
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Iterate over the lines in a file. | Iterate over the lines in a file. | ||
Latest revision as of 02:39, 21 October 2022
Available since LÖVE 0.5.0 |
This function is not supported in earlier versions. |
Iterate over the lines in a file.
Contents
Function
Synopsis
iterator = love.filesystem.lines( name )
Arguments
string name
- The name (and path) of the file
Returns
function iterator
- A function that iterates over all the lines in the file, returning the line with newlines stripped (if the line ends with
\r\n
, both are stripped independently of the OS)
Examples
Load highscore list
local highscores = {}
for line in love.filesystem.lines("highscores.txt") do
table.insert(highscores, tonumber(line))
end
Load comma separated values
local function splitCsvLine(line)
local values = {}
for value in line:gmatch("[^,]+") do -- Note: We won't match empty values.
-- Convert the value string to other Lua types in a "smart" way.
if tonumber(value) then table.insert(values, tonumber(value)) -- Number.
elseif value == "true" then table.insert(values, true) -- Boolean.
elseif value == "false" then table.insert(values, false) -- Boolean.
else table.insert(values, value) -- String.
end
end
return values
end
local function loadCsvFile(filename)
local csv = {}
for line in love.filesystem.lines(filename) do
table.insert(csv, splitCsvLine(line))
end
return csv
end
--[[ cool.csv:
Foo,Bar
true,false,11.8
]]
local csv = loadCsvFile("cool.csv")
for row, values in ipairs(csv) do
print("row="..row.." count="..#values.." values=", unpack(values))
end
See Also
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