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How to find the size of an array in postgresql
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112
As vyegorov mentioned, array_length will do the trick. Or if you know that the array is 1-dimen...
How do I sort an array of hashes by a value in the hash?
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216
Ruby's sort doesn't sort in-place. (Do you have a Python background, perhaps?)
Ruby has sort! ...
How do I delete a fixed number of rows with sorting in PostgreSQL?
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answered Mar 2 '11 at 18:01
community wiki
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How can I change Eclipse theme?
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126
Take a look at rogerdudler/eclipse-ui-themes . In the readme there is a link to a file that you...
What do single quotes do in C++ when used on multiple characters?
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285
It's a multi-character literal. 1952805748 is 0x74657374, which decomposes as
0x74 -> 't'
0...
Shading a kernel density plot between two points.
...x,y) pairs.
Edit: Here you go:
x1 <- min(which(dens$x >= q75))
x2 <- max(which(dens$x < q95))
with(dens, polygon(x=c(x[c(x1,x1:x2,x2)]), y= c(0, y[x1:x2], 0), col="gray"))
Output (added by JDL)
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Plotting time in Python with Matplotlib
...imestamps to Python datetime objects (use datetime.strptime). Then use date2num to convert the dates to matplotlib format.
Plot the dates and values using plot_date:
dates = matplotlib.dates.date2num(list_of_datetimes)
matplotlib.pyplot.plot_date(dates, values)
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onCreateOptionsMenu inside Fragments
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edited Jun 29 '15 at 21:17
Michael
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How to do Mercurial's 'hg remove' for all missing files?
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answered Mar 9 '10 at 20:35
mfperzelmfperzel
4,69511 gold badge1414 silver badges1313 bronze badges
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'No Transport' Error w/ jQuery ajax call in IE
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265
I tested this on Windows Mobile 7.
After LOTS of time spent to understand, I finally found th...