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Confusion: @NotNull vs. @Column(nullable = false) with JPA and Hibernate
...ts, but in most situations should correspond to them).
You should additionally use the JPA annotation like @Column(nullable = false) to give the jpa provider hints to generate the right DDL for creating table columns with the database constraints you want. If you can or want to rely on a JPA provi...
What is a “Stub”?
...lar kinds of double:
Dummy objects are passed around but never actually used. Usually they are just used to fill parameter lists.
Fake objects actually have working implementations, but usually take some shortcut which makes them not suitable for production (an in memory database is a good...
How to view the assembly behind the code using Visual C++?
...
There are several approaches:
You can normally see assembly code while debugging C++ in visual studio (and eclipse too). For this in Visual Studio put a breakpoint on code in question and when debugger hits it rigth click and find "Go To Assembly" ( or press CTRL+ALT...
Rails respond_with: how does it work?
...it works (what options you can use, etc) or point me to the place it's actually implemented so I can peruse the code on my own?
...
How to align absolutely positioned element to center?
...
All you have to do is,
make sure your parent DIV has position:relative
and the element you want center, set it a height and width. use the following CSS
.layer {
width: 600px; height: 500px;
display: block;
pos...
How to use Greek symbols in ggplot2?
...titute, this also works in places where expression does not work, and even allows other formatting like italics, bold etc.
– Sam
Apr 1 '16 at 14:13
add a comment
...
Why is the JVM stack-based and the Dalvik VM register-based?
...s for instructions
are largely implicit, the object
code will tend to be smaller. This
is important if you're going to be
downloading the code over a slow
network link.
Going with a register-based scheme probably means that Dalvik's code generator doesn't have to work as hard to produce performant...
bower init - difference between amd, es6, globals and node
...what is and why AMD
what is a nodejs module
what is ecmascript 6 and especially es6 modules
[UPDATE]
This feature was introduced very recently in bower and is not documented at all yet (AFAIK). It essentially describes the moduleType, which states for what module technology the package is meant t...
width:auto for fields
...ckground:khaki'>
<input style='width:100%' />
</form>
Smaller size, smaller width:
<form action='' method='post' style='width:200px;background:khaki'>
<input size='5' />
</form>
UPDATE
Here's the best I could do after a few minutes. It's 1px off in FF, Chr...
Why use argparse rather than optparse?
...recated, and will hopefully go away in the future.
argparse is better for all the reasons listed on its original page (https://code.google.com/archive/p/argparse/):
handling positional arguments
supporting sub-commands
allowing alternative option prefixes like + and /
handling zero-or-more and on...