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Remove all the elements that occur in one list from another

...have two lists, l1 and l2 . I want to perform l1 - l2 , which returns all elements of l1 not in l2 . 7 Answers ...
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In Perl, how can I read an entire file into a string?

... before reading from the file handle. See How can I read in an entire file all at once?, or $ perldoc -q "entire file" See Variables related to filehandles in perldoc perlvar and perldoc -f local. Incidentally, if you can put your script on the server, you can have all the modules you want. See ...
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Can hash tables really be O(1)?

...f your objects are variable size and an equality check requires looking at all bits then performance will become O(m). The hash function however does not have to be O(m) - it can be O(1). Unlike a cryptographic hash, a hash function for use in a dictionary does not have to look at every bit in the i...
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Why does Windows64 use a different calling convention from all other OSes on x86-64?

AMD has an ABI specification that describes the calling convention to use on x86-64. All OSes follow it, except for Windows which has it's own x86-64 calling convention. Why? ...
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How is Perl's @INC constructed? (aka What are all the ways of affecting where Perl modules are searc

What are all the ways of affecting where Perl modules are searched for? or, How is Perl's @INC constructed ? 3 Answers ...
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File name? Path name? Base name? Naming standard for pieces of a path

...rams: A) C:\users\OddThinking\Documents\My Source\Widget\foo.src Vim calls it file root (:help filename-modifiers) B) C:\users\OddThinking\Documents\My Source\Widget\foo.src file name or base name C) C:\users\OddThinking\Documents\My Source\Widget\foo.src (without dot) file/name ext...
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Is it possible to import a whole directory in sass using @import?

...rails/sass-rails, features glob importing. @import "foo/*" // import all the files in the foo folder @import "bar/**/*" // import all the files in the bar tree To answer the concern in another answer "If you import a directory, how can you determine import order? There's no way that doesn't...
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What is a software framework? [closed]

...and again for the same type of applications, you create a framework having all those facilities together in one nice packet, hence providing the abstraction for your application and more importantly many applications. share ...
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Java Singleton and Synchronization

...e loaded when it is needed. That means that the first time getInstance is called, InstanceHolder will be loaded and instance will be created, and since this is controlled by ClassLoaders, no additional synchronization is necessary. ...
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“Parser Error Message: Could not load type” in Global.asax

... Your local web server is running different code than what you're actually working on. Ensure you have stopped debugging, stop your local web server, clean and rebuild as Peter suggested, double-check your global.asax and global.asax.cs, and try again. If this doesn't work and you are using lo...