From: Hans Hagen <pragma@wxs.nl>
To: ntg-context@ntg.nl
Subject: Re: lpdf.checkedkey has problem with false values
Date: Mon, 15 Sep 2014 19:12:02 +0200 [thread overview]
Message-ID: <54171DE2.3070008@wxs.nl> (raw)
In-Reply-To: <CALDha9MKm9fUdT_6tjtj7XC8gVP9rv+kEe9nzG0nLwUQG0Q0Ww@mail.gmail.com>
On 9/15/2014 6:12 PM, Michail Vidiassov wrote:
> Dear Aditya, Peter and All,
>
>> I think that what Peter meant was:
>
> the real issue is not teaching me lua and improving the style of my example,
> but my complaint (correct or not) about inability of lpdf.checkedkey
it looks like your question was not clear then
> to correctly fetch false boolean values: they are fetched as nil, just
> as if they were absent or of incorrect type.
well, they're just not treated special
> Please, someone with time and, preferably, authority - take a look at
> lpdf.checkedkey code (5 minutes maximum).
> Talking in general about lua, not knowing what lpdf.checkedkey is,
> does and is supposed to do, does not look like efficient use of time.
you can try this (untested)
function lpdf.checkedkey(t,key,variant)
local pn = t and t[key]
if pn then
local tn = type(pn)
if tn == variant then
if variant == "string" then
return pn ~= "" and pn or nil
elseif variant == "table" then
return next(pn) and pn or nil
else
return pn
end
elseif tn == "string" then
if variant == "number" then
return tonumber(pn)
elseif variant == "boolean" then
return toboolean(pn)
end
end
end
end
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next prev parent reply other threads:[~2014-09-15 17:12 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-09-15 14:14 Michail Vidiassov
2014-09-15 14:59 ` Peter Rolf
2014-09-15 15:34 ` Michail Vidiassov
2014-09-15 15:56 ` Aditya Mahajan
2014-09-15 16:12 ` Michail Vidiassov
2014-09-15 17:12 ` Hans Hagen [this message]
2014-09-15 18:25 ` Michail Vidiassov
2014-09-15 19:17 ` Hans Hagen
2014-09-16 3:33 ` Michail Vidiassov
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