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Best way to iterate through a Perl array
...her. The sub still owns them, and will reuse them the next time the sub is called. Optimised for speed.
– ikegami
May 7 '12 at 20:26
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What does it mean: The serializable class does not declare a static final serialVersionUID field? [d
...lization runtime associates with each serializable class a version number, called a serialVersionUID, which is used during deserialization to verify that the sender and receiver of a serialized object have loaded classes for that object that are compatible with respect to serialization. If the recei...
What is the lifetime of a static variable in a C++ function?
...s scope it is only initialized once and retains its value between function calls. What exactly is its lifetime? When do its constructor and destructor get called?
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Can you write virtual functions / methods in Java?
...in Java, dynamic method dispatch happens only for the object the method is called on - as explained here so the example explaining virtual functions for C++ here is not valid for java.
– Broccoli
Dec 7 '16 at 16:42
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Looking for a clear definition of what a “tokenizer”, “parser” and...
...ually by looking for whitespace (tabs, spaces, new lines).
A lexer is basically a tokenizer, but it usually attaches extra context to the tokens -- this token is a number, that token is a string literal, this other token is an equality operator.
A parser takes the stream of tokens from the lexer a...
Object reference not set to an instance of an object.Why doesn't .NET show which object is `null`?
...null
IL_0002: stloc.0 // s
IL_0003: ldloc.0 // s
IL_0004: callvirt System.String.get_Length
IL_0009: call System.Console.WriteLine
It is the callvirt opcode that throws the NullReferenceException and it does that when the first argument on the evaluation stack is a null...
Revert to a commit by a SHA hash in Git? [duplicate]
...t reset --soft HEAD@{1} simply moves the pointer back to the HEAD prior to calling git reset 56e05fced. Using a higher number (e.g. git reset --soft HEAD@{2}) would append the new commit on a previous commit. That is, increasing the number would essentially throw away N-1 commits where N is the numb...
How to check SQL Server version
...2 respectively.
Also, Try the system extended procedure xp_msver. You can call this stored procedure like
exec master..xp_msver
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SQLAlchemy default DateTime
...u can test it here: pastebin.com/VLyWktUn . datetime.datetime.utcnow seems called as callback.
– bux
Mar 4 '16 at 14:55
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jQuery equivalent of getting the context of a Canvas
...('2d'); }, 500);
Using setTimeout is an easy way to ensure you don't try calling the canvas element before it's fully created and registered to the DOM.
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