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Optimal number of threads per core
...just add that you should experiment and measure. Your program will differ from his, or mine, or anyone else's and only measurements of your own program's behaviour will answer your questions properly. The performance of parallel (or concurrent) programs is not an area where good conclusions can be...
how to run two commands in sudo?
Is there any way how I can run two Db2 commands from a command line? (They will be called from a PHP exec command.)
10 An...
What Makes a Good Unit Test? [closed]
...uttering the test with "incidental details".. become a minimalist.
Apart from these, most of the others are guidelines that cut down on low-benefit work: e.g. 'Don't test code that you don't own' (e.g. third-party DLLs). Don't go about testing getters and setters. Keep an eye on cost-to-benefit ra...
How to list all tags along with the full message in git?
...
git tag -n99
Short and sweet. This will list up to 99 lines from each tag annotation/commit message. Here is a link to the official documentation for git tag.
I now think the limitation of only showing up to 99 lines per tag is actually a good thing as most of the time, if there were...
What is the difference between bool and Boolean types in C#
...
From the above link microsoft says The C# type keywords and their aliases are interchangeable But why we need Aliases, From my point of view Boolean is more meaningful then bool and Int32 is more meaningful then int then why ...
What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
...needs, use ConcurrentHashMap. It allows concurrent modification of the Map from several threads without the need to block them. Collections.synchronizedMap(map) creates a blocking Map which will degrade performance, albeit ensure consistency (if used properly).
Use the second option if you need to ...
Why exactly is eval evil?
...ic language or library feature to do what they want to do. Similar example from JS: I want to get a property from an object using a dynamic name, so I write: eval("obj.+" + propName) when I could have written obj[propName].
– Daniel Earwicker
Apr 3 '10 at 14:57...
How to serialize an object into a string
... System.out.println( string );
SomeClass some = ( SomeClass ) fromString( string );
System.out.println( "\n\nReconstituted object");
System.out.println( some );
}
/** Read the object from Base64 string. */
private static Object fromString( String s ) throws...
Last iteration of enhanced for loop in java
... = new StringBuilder();
for (int i : array) {
if (builder.length() != 0) {
builder.append(",");
}
builder.append(i);
}
The nice thing about this is that it will work with any Iterable - you can't always index things. (The "add the comma and then remove it at the end" is a nice...
When should I use “this” in a class?
...od of another object. The third is as a way to call alternate constructors from within a constructor.
Case 1: Using this to disambiguate variable references. In Java setter methods, we commonly pass in an argument with the same name as the private member variable we are attempting to set. We then a...