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Initializing a variable with an array reference

Thursday, 28 May 2009 14:11 Brett Hutley
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To initialize a variable with an array reference in PERL: 

 
 
my $arrayref = [];
 
 

Remember that $arrayref is a scalar variable that acts like a pointer to an array. You can also initialize it with values like so: 

 
 
my $arrayref = [ "hello", "world" ];
 
foreach my $word (@$arrayref) {
    print "$word\n";
}
 
 

Last Updated on Thursday, 28 May 2009 14:45
 

The Minimal Code to Create an Open File Dialog in Cocoa

Monday, 18 May 2009 18:07 Brett Hutley
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The following gives a minimal code necessary to create and use an NSOpenPanel modal file open dialog box in Objective C

 
    NSOpenPanel *op = [NSOpenPanel openPanel];
    if ([op runModal] == NSOKButton)
    {
        NSString *filename = [op filename];
 
    }
 
Last Updated on Monday, 18 May 2009 18:24
 

The Implementation of LUA

Thursday, 14 May 2009 15:08 Brett Hutley
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Roberto Ierusalimschy, Luiz Henrique de Figueiredo, and Waldemar Celes have written a paper on the implementation of LUA (downloadable PDF). In it, they describe the register-based virtual machine design of LUA. Interestingly, I was watching Richard Hipp's talk on SQLite the other day, in which he says that he believes a register-based virtual machine is far easier to optimize than a stack-based design.