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When is it right for a constructor to throw an exception?
... not your fault, you cannot prevent them, and you cannot sensibly clean up from them.
Boneheaded exceptions are your own darn fault, you could have prevented them and therefore they are bugs in your code.
Vexing exceptions are the result of unfortunate design decisions. Vexing exceptions are thrown ...
Further understanding setRetainInstance(true)
...cause it does have some useful information, but sadly none of it is linked from setRetainInstance(). From the page about fragments
Note: Each fragment requires a unique identifier that the system can
use to restore the fragment if the activity is restarted (and which
you can use to capture t...
Git Push error: refusing to update checked out branch
...n-bare repositories is not common). What you can do, is to fetch and merge from the other repository. This is how the pull request that you can see in Github works. You ask them to pull from you, and you don't force-push into them.
Update: Thanks to VonC for pointing this out, in the latest git v...
Getting LaTeX into R Plots
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As stolen from here, the following command correctly uses LaTeX to draw the title:
plot(1, main=expression(beta[1]))
See ?plotmath for more details.
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Write text files without Byte Order Mark (BOM)?
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I can write file with UTF8 encoding but, how to remove Byte Order Mark from it?
9 Answers
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How to represent empty char in Java Character class
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As Character is a class deriving from Object, you can assign null as "instance":
Character myChar = null;
Problem solved ;)
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What are copy elision and return value optimization?
...if copying/moving the object has side-effects.
The following example taken from Wikipedia:
struct C {
C() {}
C(const C&) { std::cout << "A copy was made.\n"; }
};
C f() {
return C();
}
int main() {
std::cout << "Hello World!\n";
C obj = f();
}
Depending on the compiler...
what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
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From what I can tell, there is no difference between hdfs dfs and hadoop fs. They're simply different naming conventions based on which version of Hadoop you're using. For example, the notes in 1.2.1 use hdfs dfs while 0.19 u...
Django “login() takes exactly 1 argument (2 given)” error
...quest, user)
To avoid it rename your view function or refer to the login from django.contrib.auth in some different way. You could for example change the import to rename the login function:
from django.contrib.auth import login as auth_login
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auth_login(request, user)
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Convert Data URI to File then append to FormData
...t works with WebKit browsers. Part of the task is to extract an image file from the canvas object and append it to a FormData object for upload.
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