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Learning Python from Ruby; Differences and Similarities
...es from the outer scope.
Python has list comprehensions, which are pretty em>x m>pressive. For em>x m>ample, if you have a list of numbers, you can write
[m>x m>*m>x m> for m>x m> in values if m>x m> > 15]
to get a new list of the squares of all values greater than 15. In Ruby, you'd have to write the following:
values....
Can't install PIL after Mac OS m>X m> 10.9
...
Following worked for me:
ln -s /Applications/m>X m>code.app/Contents/Developer/Platforms/MacOSm>X m>.platform/Developer/SDKs/MacOSm>X m>10.9.sdk/System/Library/Frameworks/Tk.framework/Versions/8.5/Headers/m>X m>11 /usr/local/include/m>X m>11
sudo pip install pil
UPDATE:
But there is more cor...
How to optimize for-comprehensions and loops in Scala?
...he problem in this particular case is that you return from within the for-em>x m>pression. That in turn gets translated into a throw of a NonLocalReturnEm>x m>ception, which is caught at the enclosing method. The optimizer can eliminate the foreach but cannot yet eliminate the throw/catch. And throw/catch is ...
How to profile a bash shell script slow startup?
...like to begin a trace in any Bash script):
PS4='+ $(date "+%s.%N")\011 '
em>x m>ec 3>&2 2>/tmp/bashstart.$$.log
set -m>x m>
add
set +m>x m>
em>x m>ec 2>&3 3>&-
at the end of ~/.bashrc (or at the end of the section of any Bash script you'd like tracing to stop). The \011 is an octal tab cha...
Get operating system info
...
The code below could em>x m>plain in its own right, how http://thismachine.info/ is able to show which operating system someone is using.
What it does is that, it sniffs your core operating system model, for em>x m>ample windows nt 5.1 as my own.
It then ...
How to determine whether a Pandas Column contains a particular value
...n a Pandas column that has a particular value. I tried to do this with if m>x m> in df['id'] . I thought this was working, em>x m>cept when I fed it a value that I knew was not in the column 43 in df['id'] it still returned True . When I subset to a data frame only containing entries matching the missing ...
#define macro for debug printing in C?
... you use a C89 compiler
If you are stuck with C89 and no useful compiler em>x m>tension, then there isn't a particularly clean way to handle it. The technique I used to use was:
#define TRACE(m>x m>) do { if (DEBUG) dbg_printf m>x m>; } while (0)
And then, in the code, write:
TRACE(("message %d\n", var));
...
Format / Suppress Scientific Notation from Python Pandas Aggregation Results
... converter like so.
In [25]: pd.set_option('display.float_format', lambda m>x m>: '%.3f' % m>x m>)
In [28]: Series(np.random.randn(3))*1000000000
Out[28]:
0 -757322420.605
1 -1436160588.997
2 -1235116117.064
dtype: float64
I'm not sure if that's the preferred way to do this, but it works.
Convert...
Set icon for Android application
...lude a 48dp sized icon:
drawable-ldpi (120 dpi, Low density screen) - 36pm>x m> m>x m> 36pm>x m>
drawable-mdpi (160 dpi, Medium density screen) - 48pm>x m> m>x m> 48pm>x m>
drawable-hdpi (240 dpi, High density screen) - 72pm>x m> m>x m> 72pm>x m>
drawable-m>x m>hdpi (320 dpi, Em>x m>tra-high density screen) - 96pm>x m> m>x m> 96pm>x m>
drawable-m>x m>m>x m>hdpi (480 dpi, Em>x m>tr...
psycopg2: insert multiple rows with one query
...ltiple rows with one query (number of rows is not constant), so I need to em>x m>ecute query like this one:
15 Answers
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