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Static Classes In Java
...tatic - Since the class cannot be instantiated no instance methods can be called or instance fields accessed
Note that the compiler will not prevent you from declaring an instance (non-static) member. The issue will only show up if you attempt to call the instance member
Simple example per sugges...
Replace comma with newline in sed on MacOS?
I have a file of id's that are comma separated. I'm trying to replace the commas with a new line. I've tried:
13 Answers
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What is a monad?
....
(The function argument provided to a method like map or flatMap is often called a "callback" in JavaScript. I will call it the "operation" since it is more general.)
If we chain multiple operations (in the traditional way):
[1,2,3].map(a => a + 1).filter(b => b != 3)
Results in the array [2...
Exit codes in Python
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What you're looking for in the script is calls to sys.exit(). The argument to that method is returned to the environment as the exit code.
It's fairly likely that the script is never calling the exit method, and that 0 is the default exit code.
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What are the main purposes of using std::forward and which problems it solves?
...e references. What is the purpose of doing that? How would that affect the called function inner if we leave t1 & t2 as lvalues?
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If a folder does not exist, create it
...xample "FILENAME" on a directory but don't give it any extension. Then try calling Directory.Exists("FILENAME") will return false, as it should because there is no such directory. Now if you call CreateDirectory("FILENAME") it will fail miserably as it should because there is already "something" wit...
jQuery Validate - Enable validation for hidden fields
... fully self-contained, properly sourced, gives code examples, and is technically correct as per the plugin's author.
– Sparky
Mar 17 '13 at 0:41
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Why does GCC generate 15-20% faster code if I optimize for size instead of speed?
... lea edi,[r13+rbx*1+0x0]
4004f2: e8 db ff ff ff call 4004d2 <_ZL3addRKiS0_.isra.0>
4004f7: 01 c3 add ebx,eax
4004f9: ff cd dec ebp
4004fb: 75 ec jne 4004e9 <_ZL4workii+0x13>...
Creating an empty file in C#
... You could use braces instead:
using (File.Create(filename)) {}
Or just call Dispose directly:
File.Create(filename).Dispose();
Either way, if you're going to use this in more than one place you should probably consider wrapping it in a helper method, e.g.
public static void CreateEmptyFile(s...
Virtual Memory Usage from Java under Linux, too much memory used
...emory that is shared with other processes. For a Java process, this is typically limited to shared libraries and memory-mapped JARfiles. In this example, I only had one Java process running, so I suspect that the 7k is a result of libraries used by the OS.
SWAP isn't turned on by default, and isn't ...