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Module:Sortkey
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local getArgs = require('Module:Arguments').getArgs local p = {} function p._encode(sortkey) -- Protect against sortkey nesting. -- Example: {{sort|{{dts|2013|07|07}}|{{dts|1990|12|01}}}} if string.find(sortkey, "sortkey") or string.find(sortkey, "data-sort-value") then return ""; end return mw.text.encode(sortkey) end function p.encode(frame) local args = getArgs(frame); return p._encode(args[1] or "") end local function valid_number(num) -- Return true if num is a valid number. -- In Scribunto (different from some standard Lua), when expressed as a string, -- overflow or other problems are indicated with text like "inf" or "nan" -- which are regarded as invalid here (each contains "n"). if type(num) == 'number' and tostring(num):find('n', 1, true) == nil then return true end end function p._sortKeyForNumber(value) local sortkey if not valid_number(value) then if value < 0 then sortkey = '1000000000000000000' else sortkey = '9000000000000000000' end elseif value == 0 then sortkey = '5000000000000000000' else local mag = math.floor(math.log10(math.abs(value)) + 1e-14) local prefix if value > 0 then prefix = 7000 + mag else prefix = 2999 - mag value = value + 10^(mag+1) end sortkey = string.format('%d', prefix) .. string.format('%015.0f', math.floor(value * 10^(math.min(28,14-mag)))) end return sortkey; end function p.sortKeyForNumber(frame) local args = getArgs(frame); return p._sortKeyForNumber(args[1] or "") end return p
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local
getArgs
=
require
(
'Module:Arguments'
)
.
getArgs
local
p
=
{
}
function
p
.
_encode
(
sortkey
)
-- Protect against sortkey nesting.
-- Example: {{sort|{{dts|2013|07|07}}|{{dts|1990|12|01}}}}
if
string
.
find
(
sortkey
,
"sortkey"
)
or
string
.
find
(
sortkey
,
"data-sort-value"
)
then
return
""
;
end
return
mw
.
text
.
encode
(
sortkey
)
end
function
p
.
encode
(
frame
)
local
args
=
getArgs
(
frame
)
;
return
p
.
_encode
(
args
[
1
]
or
""
)
end
local
function
valid_number
(
num
)
-- Return true if num is a valid number.
-- In Scribunto (different from some standard Lua), when expressed as a string,
-- overflow or other problems are indicated with text like "inf" or "nan"
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* The module exports are available as the variable "p", including unsaved modifications. * Precede a line with "=" to evaluate it as an expression or use print(). Use mw.logObject() for tables. * Use mw.log() and mw.logObject() in module code to send messages to this console.
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