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“Diff” an image using ImageMagick
...an I get the difference between two images? I have the original image. Someone has written on an exact duplicate of the original image. Now, I need to compare the original to the written on image and extract just the writing in image format.
...
Hibernate throws MultipleBagFetchException - cannot simultaneously fetch multiple bags
... the thing is, hibernate can't fetch the two collections with one query. So when you query for the parent entity, it will need 2 extra queries per result, which is normally something you don't want.
– Bozho
Jun 18 '12 at 11:19
...
Live-stream video from one android phone to another over WiFi
...r days now on how to implement a video streaming feature from an android phone to another android phone over a WiFi connection but I can't seem to find anything useful. I looked on android developers for sample code, stackoverflow, google, android blogs but nothing. All I can find are some sort of p...
Difference between FetchType LAZY and EAGER in Java Persistence API?
...te String id;
private String name;
private String address;
@OneToMany(fetch = FetchType.EAGER)
private List<Student> students;
// etc.
}
And here's an example where students is explicitly marked to be loaded lazily:
@Entity
public class University {
@Id
...
Circle drawing with SVG's arc path
...it, not SVG itself. But that is how you make a circle in SVG/XAMLs Arc component.
– Todd Main
Apr 21 '11 at 4:21
Ahhh,...
Switch statement for greater-than/less-than
...e fastest in all tested environments except
for Opera where it takes about one and a half times as long. It is slow because the engine
has to compare the value twice for each case. Surprisingly it takes Chrome almost 40 times longer to complete this compared to the fastest operation in Chrome, while...
How to use arguments from previous command?
... is a particular combination you use frequently, you can define a macro so one keystroke will perform it. This example will recall the second argument from previous commands by pressing Alt-Shift-Y. You could choose any available keystroke you prefer instead of this one. You can press it repeatedly ...
Java: when to use static methods
...
One rule-of-thumb: ask yourself "Does it make sense to call this method, even if no object has been constructed yet?" If so, it should definitely be static.
So in a class Car you might have a method:
double convertMpgToKpl...
How to avoid “RuntimeError: dictionary changed size during iteration” error?
....
Another way is to use list to force a copy of the keys to be made. This one also works in Python 3.x:
for i in list(d):
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Why can't C++ be parsed with a LR(1) parser?
...st element. There can be arbitrarily many tokens before the disambiguating one.
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