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Why should I not wrap every block in “try”-“catch”?
... Kendall: If an exception gets to a top-level handler, your application is by definition in an undefined state. Although in some specific cases there might be value to preserving the user's data (Word's document recovery comes to mind) the program shouldn't overwrite any files or commit to a databas...
How to exit in Node.js
... should set the
process.exitCode and allow the process to exit naturally by avoiding
scheduling any additional work for the event loop:
// How to properly set the exit code while letting
// the process exit gracefully.
if (someConditionNotMet()) {
printUsageToStdout();
process.exitCode = ...
Pickle incompatibility of numpy arrays between Python 2 and 3
.... If this is a bug in the Python 3 unpickler, or a "misuse" of the pickler by numpy, I don't know.
Here is something of a workaround, but I don't know how meaningful the data is at this point:
import pickle
import gzip
import numpy
with open('mnist.pkl', 'rb') as f:
u = pickle._Unpickler(f)
...
Force line-buffering of stdout when piping to tee
...ugh I had to compile expect myself as unbuffer doesn't seem to be included by default in OS X.
– houbysoft
Jul 5 '12 at 3:11
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$(document).ready equivalent without jQuery
... , but it doesn't use anything else from jQuery. I'd like to lighten it up by removing the jQuery dependency.
38 Answers
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nginx missing sites-available directory
...
Well, I think nginx by itself doesn't have that in its setup, because the Ubuntu-maintained package does it as a convention to imitate Debian's apache setup. You could create it yourself if you wanted to emulate the same setup.
Create /etc/ngi...
How do I unlock a SQLite database?
...
I caused my sqlite db to become locked by crashing an app during a write. Here is how i fixed it:
echo ".dump" | sqlite old.db | sqlite new.db
Taken from: http://random.kakaopor.hu/how-to-repair-an-sqlite-database
...
Rename package in Android Studio
...
Another good method is: First create a new package with the desired name by right clicking on the Java folder → New → Package.
Then, select and drag all your classes to the new package. Android Studio will refactor the package name everywhere.
Finally, delete the old package.
Done.
Very im...
How to set child process' environment variable in Makefile
...riables are not exported into the environment of processes make invokes... by default. However you can use make's export to force them to do so. Change:
test: NODE_ENV = test
to this:
test: export NODE_ENV = test
(assuming you have a sufficiently modern version of GNU make >= 3.77 ).
...
What is the equivalent of Java's final in C#?
...ints out, a notable difference between the two languages here is that Java by default marks all non-static methods as virtual, whereas C# marks them as sealed. Hence, you only need to use the sealed keyword in C# if you want to stop further overriding of a method that has been explicitly marked virt...