Re: [NTG-context] How to define such a function in lua? Sorry I don't have a name on it.
On Fri, Dec 5, 2008 at 8:05 AM, Arthur Reutenauer [EMAIL PROTECTED] wrote: but it might make more sense to look into metatables (i assume that you own the programming in lua book which explains that) I don't have one :(, I'll take a good at it later. You really should look into the book, it has a whole chapter about object-oriented programming in Lua, and explains useful conventions. Oh it's a long document. I almost took a day to finish it. I've got the main idea now. Thanks. I'm sorry, I got another question now. How to link two variables? Like if I change one, the other would be changed as well. This may be a piece of cake for you and please forgive my laziness. Arthur ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___ -- Best Regards Chen Zhi-chu Chen | Shanghai Synchrotron Radiation Facility No. 2019 | Jialuo Rd. | Jiading | Shanghai | P.R. China tel: 086 21 5955 3405 | zhichu.chen.googlepages.com | www.sinap.ac.cn ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] How to define such a function in lua? Sorry I don't have a name on it.
variables are only symbols in lua. they are reference to values (a place in the memory). On 12/5/08, Zhichu Chen [EMAIL PROTECTED] wrote: On Fri, Dec 5, 2008 at 8:05 AM, Arthur Reutenauer [EMAIL PROTECTED] wrote: but it might make more sense to look into metatables (i assume that you own the programming in lua book which explains that) I don't have one :(, I'll take a good at it later. You really should look into the book, it has a whole chapter about object-oriented programming in Lua, and explains useful conventions. Oh it's a long document. I almost took a day to finish it. I've got the main idea now. Thanks. I'm sorry, I got another question now. How to link two variables? Like if I change one, the other would be changed as well. This may be a piece of cake for you and please forgive my laziness. Arthur ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___ -- Best Regards Chen Zhi-chu Chen | Shanghai Synchrotron Radiation Facility No. 2019 | Jialuo Rd. | Jiading | Shanghai | P.R. China tel: 086 21 5955 3405 | zhichu.chen.googlepages.com | www.sinap.ac.cn ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___ ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
Re: [NTG-context] How to define such a function in lua? Sorry I don't have a name on it.
Zhichu Chen wrote:
Hi,
I'm learning to use luatex these days, one day actually. It's very
interesting. Although reference manuals are available, I still don't
know how to implement my designation.
The thing is, I know there's a self variable for object-oriented
programming, like
==
\startluacode
testdata = { a = 0,
b = 0,
c = 0,
plus = function (self)
self.c = self.a + self.b
end
}
mytest = testdata
mytest.a=10
mytest.b=100
mytest:plus()
tex.print(mytest.c)
\stopluacode
==
OK, but what if I wanna do something more, like substract? I would
like to use another object, like
==
\startluacode
testdata = { a = 0,
b = 0,
c = 0,
calc = Calc
}
Calc = { plus = function (self)
self.c = self.a + self.b
end,
substract = function (self)
self.c = self.a - self.b
end
}
mytest = testdata
mytest.a=10
mytest.b=100
mytest.calc:plus()
tex.print(mytest.c)
\stopluacode
==
Of course this won't work, for the self in Calc refers to mytest.calc
rather than mytest. How to implement things like that?
Calc = { add = function (self)
self.c = self.a + self.b
end,
substract = function (self)
self.c = self.a - self.b
end
}
testdata = { a = 0,
b = 0,
c = 0,
calc = function(self,f) return Calc[f](self) end
}
mytest = testdata
mytest.a=10
mytest.b=100
Calc.add(testdata)
print(mytest.c)
testdata:calc(substract)
print(mytest.c)
but it might make more sense to look into metatables (i assume that you
own the programming in lua book which explains that)
Hans
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
-
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___
Re: [NTG-context] How to define such a function in lua? Sorry I don't have a name on it.
On Thu, Dec 4, 2008 at 5:28 PM, Hans Hagen [EMAIL PROTECTED] wrote:
Zhichu Chen wrote:
Hi,
I'm learning to use luatex these days, one day actually. It's very
interesting. Although reference manuals are available, I still don't
know how to implement my designation.
The thing is, I know there's a self variable for object-oriented
programming, like
==
\startluacode
testdata = { a = 0,
b = 0,
c = 0,
plus = function (self)
self.c = self.a + self.b
end
}
mytest = testdata
mytest.a=10
mytest.b=100
mytest:plus()
tex.print(mytest.c)
\stopluacode
==
OK, but what if I wanna do something more, like substract? I would
like to use another object, like
==
\startluacode
testdata = { a = 0,
b = 0,
c = 0,
calc = Calc
}
Calc = { plus = function (self)
self.c = self.a + self.b
end,
substract = function (self)
self.c = self.a - self.b
end
}
mytest = testdata
mytest.a=10
mytest.b=100
mytest.calc:plus()
tex.print(mytest.c)
\stopluacode
==
Of course this won't work, for the self in Calc refers to mytest.calc
rather than mytest. How to implement things like that?
Calc = { add = function (self)
self.c = self.a + self.b
end,
substract = function (self)
self.c = self.a - self.b
end
}
testdata = { a = 0,
b = 0,
c = 0,
calc = function(self,f) return Calc[f](self) end
}
mytest = testdata
mytest.a=10
mytest.b=100
Calc.add(testdata)
print(mytest.c)
testdata:calc(substract)
print(mytest.c)
Thanks
but it might make more sense to look into metatables (i assume that you
own the programming in lua book which explains that)
I don't have one :(, I'll take a good at it later.
Hans
-
Hans Hagen | PRAGMA ADE
Ridderstraat 27 | 8061 GH Hasselt | The Netherlands
tel: 038 477 53 69 | fax: 038 477 53 74 | www.pragma-ade.com
| www.pragma-pod.nl
-
___
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
--
Best Regards
Chen
Zhi-chu Chen | Shanghai Synchrotron Radiation Facility
No. 2019 | Jialuo Rd. | Jiading | Shanghai | P.R. China
tel: 086 21 5955 3405 | zhichu.chen.googlepages.com
| www.sinap.ac.cn
___
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
Re: [NTG-context] How to define such a function in lua? Sorry I don't have a name on it.
but it might make more sense to look into metatables (i assume that you own the programming in lua book which explains that) I don't have one :(, I'll take a good at it later. You really should look into the book, it has a whole chapter about object-oriented programming in Lua, and explains useful conventions. Arthur ___ If your question is of interest to others as well, please add an entry to the Wiki! maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context webpage : http://www.pragma-ade.nl / http://tex.aanhet.net archive : https://foundry.supelec.fr/projects/contextrev/ wiki : http://contextgarden.net ___
[NTG-context] How to define such a function in lua? Sorry I don't have a name on it.
Hi,
I'm learning to use luatex these days, one day actually. It's very
interesting. Although reference manuals are available, I still don't
know how to implement my designation.
The thing is, I know there's a self variable for object-oriented
programming, like
==
\startluacode
testdata = { a = 0,
b = 0,
c = 0,
plus = function (self)
self.c = self.a + self.b
end
}
mytest = testdata
mytest.a=10
mytest.b=100
mytest:plus()
tex.print(mytest.c)
\stopluacode
==
OK, but what if I wanna do something more, like substract? I would
like to use another object, like
==
\startluacode
testdata = { a = 0,
b = 0,
c = 0,
calc = Calc
}
Calc = { plus = function (self)
self.c = self.a + self.b
end,
substract = function (self)
self.c = self.a - self.b
end
}
mytest = testdata
mytest.a=10
mytest.b=100
mytest.calc:plus()
tex.print(mytest.c)
\stopluacode
==
Of course this won't work, for the self in Calc refers to mytest.calc
rather than mytest. How to implement things like that?
Thanks in advance.
--
Best Regards
Chen
Zhi-chu Chen | Shanghai Synchrotron Radiation Facility
No. 2019 | Jialuo Rd. | Jiading | Shanghai | P.R. China
tel: 086 21 5955 3405 | zhichu.chen.googlepages.com
| www.sinap.ac.cn
___
If your question is of interest to others as well, please add an entry to the
Wiki!
maillist : ntg-context@ntg.nl / http://www.ntg.nl/mailman/listinfo/ntg-context
webpage : http://www.pragma-ade.nl / http://tex.aanhet.net
archive : https://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___
