[Flashcoders] compiler not warning (little rant)
A/MMC does not warn before using this: var o = new Object(); o.arguments [1, 2, 3]; is this a statement or what ? and if so, what does it do, all i could see is undefined / null / not there fun to find this one in a ~1 lines project. micha ___ Flashcoders@chattyfig.figleaf.com To change your subscription options or search the archive: http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Brought to you by Fig Leaf Software Premier Authorized Adobe Consulting and Training http://www.figleaf.com http://training.figleaf.com
Re: [Flashcoders] compiler not warning (little rant)
On 3/1/06, Michael Stuhr [EMAIL PROTECTED] wrote:
A/MMC does not warn before using this:
var o = new Object();
o.arguments [1, 2, 3];
is this a statement or what ? and if so, what does it do, all i could see is
undefined / null / not there
fun to find this one in a ~1 lines project.
So...technically that is legal, though I don't know why anyone would do that.
First of all, you can put a constant on a line by itself, and it just
does nothing:
3; // this is legal in AS
myObj.blah[3] // this is also legal
Secondly, there is the syntax ([expr1],[expr2],...,[exprN]), which
will execute all the expressions, and return the result of exprN.
so:
(1,2,3)
is the same as:
function blah()
{
1; // legal, as per above.
2;
return 3;
}
blah();
Finally, your statement combines the two principles:
o.arguments[1,2,3];
is the same as :
o.arguments[ (1,2,3) ];
compiles to:
1;
2;
o.arguments[3];
which are 3 legal commands, but they don't do anything.
Hope this helps your understanding a bit. But I agree, MMC should
definately have a 'strict compile' mode that warns when you do weird
things like that. AS3 probably would complain (maybe not though?)
-David R
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Re: [Flashcoders] compiler not warning (little rant)
David Rorex schrieb:
On 3/1/06, Michael Stuhr [EMAIL PROTECTED] wrote:
A/MMC does not warn before using this:
var o = new Object();
o.arguments [1, 2, 3];
is this a statement or what ? and if so, what does it do, all i could see is
undefined / null / not there
fun to find this one in a ~1 lines project.
So...technically that is legal, though I don't know why anyone would do that.
First of all, you can put a constant on a line by itself, and it just
does nothing:
3; // this is legal in AS
myObj.blah[3] // this is also legal
Secondly, there is the syntax ([expr1],[expr2],...,[exprN]), which
will execute all the expressions, and return the result of exprN.
so:
(1,2,3)
is the same as:
function blah()
{
1; // legal, as per above.
2;
return 3;
}
blah();
Finally, your statement combines the two principles:
o.arguments[1,2,3];
is the same as :
o.arguments[ (1,2,3) ];
compiles to:
1;
2;
o.arguments[3];
which are 3 legal commands, but they don't do anything.
Hope this helps your understanding a bit. But I agree, MMC should
definately have a 'strict compile' mode that warns when you do weird
things like that. AS3 probably would complain (maybe not though?)
-David R
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thanks for your time, but that doesn't answer my q's. i had:
o.arguments [1, 2, 3];
with whitespace in there, where there should be a
'='
so why doesn't MMC complpain about that ? i this a legal statement ?
i know
'o.arguments[1, 2, 3];'
or equivalent would be, but i didn't write that.
micha
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Re: [Flashcoders] compiler not warning (little rant)
so why doesn't MMC complpain about that ? i this a legal statement ? i know 'o.arguments[1, 2, 3];' or equivalent would be, but i didn't write that. as far as the compiler is concerned you did write that because whitespace is ignored. e.g. : code : var x:Array = []; x [ 0 ] = 23; trace ( x [0 ] ) ; : output : 23 :) martin ___ Flashcoders@chattyfig.figleaf.com To change your subscription options or search the archive: http://chattyfig.figleaf.com/mailman/listinfo/flashcoders Brought to you by Fig Leaf Software Premier Authorized Adobe Consulting and Training http://www.figleaf.com http://training.figleaf.com
