On 18-12-2010 12:03, Philipp Gesang wrote:
On 2010-12-18<01:50:29>, Philipp A. wrote:
<snip lines="some"/>
well, i just like it. and since i don’t know lua (well, that’s not exactly
true, but i can’t write a normal sized script without looking things up),
and tend to do things like i would do them in other languages i know. e.g.:
how do you loop elegantly over table values? “for k,v in pairs(t) do print(v)
end” creates a throwaway variable k, which doesn’t seem right. some things
Depending on whether you want to access the non-hashed content as
well you might want to use the “next” iterator instead as it’s
slightly faster (according to my tests, that is). You won’t get
around the local variable, though; I have no clue and no time to
check if it’s even technically feasible to iterate a hash table
without accessing the hashes.
indeed, for k, v in next, sometable do ... is faster as it saves one
function call (i.e. pairs returning the next, table)
for indexed iteration using for i=1,n do ... is much faster than ipairs
as it involves no function calls
are totally counter-intuitive for me like tables beginning with index 1, and
so on.
Feels natural after some time, I guarantee. And you’ll never look
the same way at a fencepost again …
indeed, I also like the start at 1 very much, as you say .. natural
What you’ll miss most is all the nice shortcuts and syntactic
sugar like “setdefault(k,[]).append(v)” (two lines in Lua) and
the lazy handling of arrays, strings&c. as sequences that can be
iterated over like it was all the same, and probably the error
handling. Nothing you can’t live without.
and often you can roll out your own without carying the truckload of
(mostly soon forgotten) lib code
Anyhow, I don't like languages that need religious arguments to become
popular.
or are you talking about lua having been invented at a catholic university
and thus being a product of a sect somehow?
Never looked at it that way. There should be a “fun facts”
section on the wiki to list all the confusing mysteries
surrounding context.
I was refering to python related religious (with the programming
language being the gospel) discussions, so far I never ran into a lua
one. All those 'one should use this language over that' or 'this
operating system over that one' are wasted on me as languages come and
go, as do operating systems and related concepts. Pointless discussions
when seen over a 1000 year period of time. Printing used to be done
using wooden blocks and that was high end and the best at some point,
then came lead (too poisonous now), then film (short fashion), now ...
Regards,
Philipp
PS:
kross is the project for bringing consistent scripting to KDE, and it is
just awesome, since it allows you to write stuff in the scripting language
of your choice.
like .net
Apart from being OT, you can always switch to a window manager
that uses your favorite scripting language instead -- mine has
Lua inside which is a lot cleaner than doing configuration in
e.g. bash or something.
sure, and performance seldom is an issue I guess on todays machines.
Hans
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