...range your data frame library(reshape2) dd = melt(dd_sub, id=c("fecha")) All that's left is a simple ggplot command: ggplot(dd) + geom_line(aes(x=fecha, y=value, colour=variable)) + scale_colour_manual(values=c("red","green","blue")) Example plot ...

...tion and simply increasing the number of --workers, what you get is essentially a number of processes (managed by Gunicorn) that each behave like the app.run() development server. 4 workers == 4 concurrent requests. This is because Gunicorn uses its included sync worker type by default. It is impo...

...e come right out and say it — I do not believe in debuggers. I don’t really know how to use any debugger, and have never used one seriously. Furthermore, I believe that the big fault in debuggers is their basic nature — most failures I debug happened a long long time ago, in a galaxy far far a...

... Not all cultures use the same format for dates and decimal / currency values. This will matter for you when you are converting input values (read) that are stored as strings to DateTime, float, double or decimal. It will also ...

I originally posted this as a question only about destructors, but now I'm adding consideration of the default constructor. Here's the original question: ...

..., those are the headers sent by PHP without specifying the above in my installation.. It seems PHP tries to prevent browser caching by default... – fast-reflexes May 19 '13 at 10:03 ...

...o there's some security there, but physical access to a phone could potentially allow access to the values. If possible I'd consider modifying the server to use a negotiated token for providing access, something like OAuth. Alternatively you may need to construct some sort of cryptographic store, t...

...ava.io.Serializable but with custom-written mechanisms to perform the marshalling and unmarshalling functions (you need to implement readExternal and writeExternal methods on your class). This gives you the means to get around the reflection performance bottleneck. In recent versions of Java (1.3 ...

... Try the following, in order: Smaller buffer size. Writing ~2 MiB at a time might be a good start. On my last laptop, ~512 KiB was the sweet spot, but I haven't tested on my SSD yet. Note: I've noticed that very large buffers tend to decrease performance. ...

...bjects - so the hash code is not necessarily unique. A dictionary is a really cool data structure that trades a higher memory footprint in return for (more or less) constant costs for Add/Remove/Get operations. It is a poor choice for iterating over though. Internally, a dictionary contains an arr...