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Where should @Service annotation be kept? Interface or Implementation?
...tion when using annotation-based configuration and classpath
scanning.
From my experience I am always using @Service annotation on the interfaces or abstract classes and annotations like @Component and @Repository for their implementation. @Component annotation I am using on those classes which ...
String isNullOrEmpty in Java? [duplicate]
....isNotEmpty(str)
StringUtils.isBlank(str) or StringUtils.isNotBlank(str)
from Apache commons-lang.
The difference between empty and blank is : a string consisted of whitespaces only is blank but isn't empty.
I generally prefer using apache-commons if possible, instead of writing my own utility m...
How to prune local tracking branches that do not exist on remote anymore
...merged master | egrep -v '^\s*\*?\s*master$' | xargs git branch -d. Output from git v2.10.1 will display "* master" when master is checked out. I get rid of master both with or without an asterisk.
– Esteban
May 16 '17 at 19:12
...
Math - mapping numbers
...line, with Y=f(X)=m*X+b, where m and b have been determined simultaneously from the following two constraint equations that result from substituting the values of X and Y at the required endpoints: C=m*A+b and D=m*B+b
– Chris Chiasson
Mar 9 '17 at 16:57
...
Modulo operator with negative values [duplicate]
...
From ISO14882:2011(e) 5.6-4:
The binary / operator yields the quotient, and the binary % operator
yields the remainder from the division of the first expression by the
second. If the second operand of / or % is zero t...
Advantages and disadvantages of GUID / UUID database keys
...ORM's usually like them
Unique across applications. So We can use the PK's from our CMS (guid) in our app (also guid) and know we are NEVER going to get a clash.
Disadvantages:
Larger space use, but space is cheap(er)
Can't order by ID to get the insert order.
Can look ugly in a URL, but really,...
Which Python memory profiler is recommended? [closed]
...mple to use. At some point in your code, you have to write the following:
from guppy import hpy
h = hpy()
print(h.heap())
This gives you some output like this:
Partition of a set of 132527 objects. Total size = 8301532 bytes.
Index Count % Size % Cumulative % Kind (class / dict of clas...
How does libuv compare to Boost/ASIO?
...perations, and higher-level operations for common tasks, including reading from a stream until a newline is received.
Feature List
Here is the brief side-by-side comparison on some of the major features. Since developers using Boost.Asio often have other Boost libraries available, I have opted ...
How to start a background process in Python?
...o find a background process and redirect its IO so that attach.py can read from / write to some_long_running_prog in background?
– raof01
Mar 5 '14 at 6:46
...
Modify request parameter with servlet filter
...hod. This is deliberate, since the class represents the request as it came from the client, and modifying the parameter would not represent that.
One solution is to use the HttpServletRequestWrapper class, which allows you to wrap one request with another. You can subclass that, and override the ge...