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JPA or JDBC, how are they different?
...nderlying technologies behind most Java database access (including JPA providers).
One of the issues with traditional JDBC apps is that you can often have some crappy code where lots of mapping between data sets and objects occur, logic is mixed in with SQL, etc.
JPA is a standard for Object Relat...
How to set Meld as git mergetool
...it works great. In my case, it was the 'cmd' which was missing to properly call meld
– faidherbard
Jun 12 '16 at 21:02
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Shading a kernel density plot between two points.
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I never would have gotten that to work if you had not provided the structure. Thanks!
– JD Long
Aug 16 '10 at 17:17
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How does git store files?
...ntent already present in the Git repo, the snapshot will simply point to said content rather than duplicate it.
That also means that several files with the same content are stored only once.
So a snapshot is basically a commit, referring to the content of a directory structure.
Some good reference...
How can I create a copy of an Oracle table without copying the data?
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In Oracle SQL Developer v.18.3 the tab is called SQL
– Metafaniel
Jan 22 '19 at 15:07
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Difference between web server, web container and application server
...ervlet JSP
Web Container:
it maintains the life cycle for Servlet Object.
Calls the service method for that servlet object.
pass the HttpServletRequest and HttpServletResponse Object
Application Server:
It holds big Enterprise application having big business logic.
It is Heavy Weight or it holds ...
Determine which JAR file a class is from
I am not in front of an IDE right now, just looking at the API specs.
4 Answers
4
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Nullable vs. int? - Is there any difference?
...e gory details see this question, but to give you a quick example here:
void Test<T>(T a, bool b)
{
var test = a is int? & b; // does not compile
var test2 = a is Nullable<int> & b; // does compile
}
The first line gives the following error messages:
e...
Remove warning messages in PHP
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You can put an @ in front of your function call to suppress all error messages.
@yourFunctionHere();
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How can I do time/hours arithmetic in Google Spreadsheet?
...ther (or other arithmetic operations), you can specify either a cell, or a call to TIME, for each input of the formula.
For example:
B3 = 10:45
C3 = 20 (minutes)
D3 = 15 (minutes)
E3 = 8 (hours)
F3 = B3+time(E3,C3+D3,0) equals 19:20
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