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How do I write a correct micro-benchmark in Java?
... iterations.)
Rule 2: Always run with -XX:+PrintCompilation, -verbose:gc, etc., so you can verify that the compiler and other parts of the JVM are not doing unexpected work during your timing phase.
Rule 2.1: Print messages at the beginning and end of timing and warmup phases, so you can verify th...
What is a classpath and how do I set it?
...s a "gotcha" with all of the above. On most systems (Linux, Mac OS, UNIX, etc) the colon character (':') is the classpath separator. In windowsm the separator is the semicolon (';')
So what's the best way to do it?
Setting stuff globally via environment variables is bad, generally for the same k...
How is null + true a string?
... | same with System.Single, System.Double, System.Decimal, System.TimeSpan etc
var b = (null + new Object()); // String | same with any ref type
Crazy?? No, there must be a reason behind it.
Someone call Eric Lippert...
s...
How to change max_allowed_packet size
...s:
1) open terminal
2) ssh root@YOURIP
3) enter root password
4) nano /etc/mysql/my.cnf (if command is not recognized do this first or try vi then repeat: yum install nano )
5) add the line: max_allowed_packet=256M (obviously adjust size for whatever you need) under the [MYSQLD] section. He ma...
Difference between >>> and >>
...s a number. For example: Telephone numbers, post codes (in many countries) etc. are strings of decimal digits, but it doesn't make sense to add, subtract or multiply them, so they're not really numbers. They happen to be strings of decimal digits, but should be treated as strings of characters. (Pos...
What are the differences between numpy arrays and matrices? Which one should I use?
...tiply (reduce) two tensors (scalar product,
matrix vector multiplication etc.).
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Unknown provider: $modalProvider
... of error occurs when you write in a dependency for a controller, service, etc, and you haven't created or included that dependency.
In this case, $modal isn't a known service. It sounds like you didn't pass in ui-bootstrap as a dependency when bootstrapping angular. angular.module('myModule', ['ui...
Should I call Close() or Dispose() for stream objects?
Classes such as Stream , StreamReader , StreamWriter etc implements IDisposable interface. That means, we can call Dispose() method on objects of these classes. They've also defined a public method called Close() . Now that confuses me, as to what should I call once I'm done with objects?...
What's the difference between subprocess Popen and call (how can I use them)?
...ructor, so you can still set the process' output, environmental variables, etc., your script waits for the program to complete, and call returns a code representing the process' exit status.
returncode = call(*args, **kwargs)
is basically the same as calling
returncode = Popen(*args, **kwargs...
“please check gdb is codesigned - see taskgated(8)” - How to get gdb installed with homebrew code si
...omebrew (motivation get a new gdb with new features such as --with-python etc... )
10 Answers
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