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Good reasons to prohibit inheritance in Java?
...ion of inherited classes with their parents can be surprising and unpredicatable if the ancestor wasn't designed to be inherited from.
Classes should therefore come in two kinds :
Classes designed to be extended, and with enough documentation to describe how it should be done
Classes marked fina...
What is the difference between the template method and the strategy patterns?
.... Choosing which product type (class) to instantiate might depend on which tables/views it's loaded from. Strategy pattern doesn't really come into play there.
– tvanfosson
Jul 31 '15 at 16:22
...
parseInt(null, 24) === 23… wait, what?
...o find out what the toString representation of null is. We need to look at Table 13 — ToString Conversions in section 9.8.0 for that information:
Great, so now we know that doing toString(null) internally yields a 'null' string. Great, but how exactly does it handle digits (characters) that are...
Difference between HashMap, LinkedHashMap and TreeMap
...ce in the output as all the three has keySet and values . What are Hashtable s?
17 Answers
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Unable to login to SQL Server + SQL Server Authentication + Error: 18456
...e common error states and their descriptions are provided in the following table:
ERROR STATE ERROR DESCRIPTION
------------------------------------------------------------------------------
2 and 5 Invalid userid
6 Attempt to use a Windows login name with SQL Auth...
搭建高可用mongodb集群（二）—— 副本集 - 大数据 & AI - 清泛网 - 专注C/...
....168.1.136:27017 would veto with 'I don't think 192.168.1.138:27017 is electable'
Sun Dec 29 20:26:31.059 [rsHealthPoll] replset info 192.168.1.137:27017 thinks that we are down
Sun Dec 29 20:26:31.059 [rsHealthPoll] replSet member 192.168.1.137:27017 is now in state STARTUP2
Sun Dec 29 20:26:31....
Multiple actions were found that match the request in Web Api
...
After a lot of searching the web and trying to find the most suitable form for routing map
if have found the following
config.Routes.MapHttpRoute("DefaultApiWithId", "Api/{controller}/{id}", new { id =RouteParameter.Optional }, new { id = @"\d+" });
config.Routes.MapHttpRoute("DefaultAp...
Are there conventions on how to name resources?
...nge in time. So its completely normal that naming conventions that were suitable in the beginning will not be suitable after 2 years. And it's completely fine. You should not try to predict future. Just choose a convention and follow it. You will find if it is suitable for you and your project. If i...
OpenCV C++/Obj-C: Detecting a sheet of paper / Square Detection
...
f = Import["http://thwartedglamour.files.wordpress.com/2010/06/my-coffee-table-1-sa.jpg"]
f = ImageResize[f, ImageDimensions[f][[1]]/4]
g = MedianFilter[ColorConvert[f, "Grayscale"], 2]
h = DeleteSmallComponents[Thinning[
Binarize[ImageSubtract[Dilation[g, 1], Erosion[g, 1]]]]]
convexvert = C...
What RSA key length should I use for my SSL certificates?
...p up to 128-bit AES) for symmetric ciphers and a 2048-bit key for RSA. See Table 2 for a rough equivalence.
Valid or not, being able to refer them to a NIST publication helps customers feel better about security (if they bother to ask).
...