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Avoiding instanceof in Java
...is entry from Steve Yegge's Amazon blog: "when polymorphism fails". Essentially he's addressing cases like this, when polymorphism causes more trouble than it solves.
The issue is that to use polymorphism you have to make the logic of "handle" part of each 'switching' class - i.e. Integer etc. in ...
Is there a Pattern Matching Utility like GREP in Windows?
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There is a command-line tool called FINDSTR that comes with all Windows NT-class operating systems (type FINDSTR /? into a Command Prompt window for more information) It doesn't support everything grep does but it might be sufficient for your needs.
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Conditionally use 32/64 bit reference when building in Visual Studio
...file(s). You also need separate directories for the different binaries, ideally siblings of each other, and with the same name as the platform you are targeting.
After adding a single platform's references to the project, open the .csproj in a text editor. Before the first <ItemGroup> element...
How to extract request http headers from a request using NodeJS connect
...this more helpful than the accepted answer above. The JSON.stringify makes all the difference.
– Patrick
Sep 8 '15 at 20:39
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Why use a prime number in hashCode?
...ly be determined by the least significant entry (the one not multiplied at all). Similar entries will collide. Not good for a hash function.
31 is a large enough prime that the number of buckets is unlikely to be divisible by it (and in fact, modern java HashMap implementations keep the number of b...
Why is there no String.Empty in Java?
...would save on compile time, in fact I think it would be the latter.
Especially considering Strings are immutable, it's not like you can first get an empty String, and perform some operations on it - best to use a StringBuilder (or StringBuffer if you want to be thread-safe) and turn that into a Str...
What does the comma operator , do?
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then if I write i = (5,4,3,2,1,0) then ideally it should return 0, correct? but i is being assigned a value of 5? Can you please help me understand where am I going wrong?
– Jayesh
Nov 13 '10 at 6:55
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What happens if I define a 0-size array in C/C++?
Just curious, what actually happens if I define a zero-length array int array[0]; in code? GCC doesn't complain at all.
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Execute a command line binary with Node.js
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For even newer version of Node.js (v8.1.4), the events and calls are similar or identical to older versions, but it's encouraged to use the standard newer language features. Examples:
For buffered, non-stream formatted output (you get it all at once), use child_process.exec:
const {...
How do I wait for an asynchronously dispatched block to finish?
...ly even if runSomeLongOperationAndDo: decides that the operation isn't actually long enough to merit threading and runs synchronously instead.
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