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What is the optimal length for an email address in a database?
...de: 24 Std. Dev (w/
outliers): 5.20 Std. Dev (w/o
outliers): 4.70
Ranges based on data including
outliers
68.2% of data 17.8 - 28.2
95.4% of data 12.6 - 33.4
99.7% of data 7.4 - 38.6
Ranges based on data outliers excluded
68.2% of data 18.1 - 27.5
95.4% of data 13.4 - 32.2
...
Is Redis just a cache?
...ender your homepage, you ask Redis for the most recent 25 questions.
$ lrange questions 0 24
1) "question:100"
2) "question:99"
3) "question:98"
4) "question:97"
5) "question:96"
...
25) "question:76"
Now that you have the ids, retrieve items from Redis using pipelining and show them to the use...
How do I get the row count of a pandas DataFrame?
...fplot
perfplot.save(
"out.png",
setup=lambda n: pd.DataFrame(np.arange(n * 3).reshape(n, 3)),
n_range=[2**k for k in range(25)],
kernels=[
lambda data: data.shape[0],
lambda data: data[0].count(),
lambda data: len(data.index),
],
labels=["data.shape[...
What's a quick way to comment/uncomment lines in Vim?
... which just runs any arbitrary vim commands at each line in your specified range. For example:
Commenting with #:
1. visually select the text rows (using V as usual)
2. :norm i#
This inserts "#" at the start of each line. Note that when you type : the range will be filled in, so it will really...
Cannot set some HTTP headers when using System.Net.WebRequest
...
Connection
Content-Length
Content-Type
Date
Expect
Host
If-Modified-Since
Range
Referer
Transfer-Encoding
User-Agent
Proxy-Connection
So, next time you are facing this exception and don't know how to solve this, remember that there are some restricted headers, and the solution is to modify thei...
How to avoid overflow in expr. A * B - C * D
... Since double has to allocate some bits for the exponent, it has a smaller range of possible values without loss of precision.
– Jim Garrison
Nov 5 '12 at 19:03
...
Writing Unicode text to a text file?
... collections import Counter
try: # use these if Python 2
unicode_chr, range = unichr, xrange
except NameError: # Python 3
unicode_chr = chr
exclude_categories = set(('Co', 'Cn'))
counts = Counter()
control_names = dict(enumerate(controlnames))
with io.open('unidata', 'w', encoding='utf-8')...
Python: Using .format() on a Unicode-escaped string
...scii' codec can't encode character u'\u2265' in position 0: ordinal not in range(128)
>>> print u"{0}".format(s)
≥
>>>
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What to use instead of “addPreferencesFromResource” in a PreferenceActivity?
...ving to resort to all sorts of workarounds to make your app work in a wide range of devices. It's really frustrating!
Your class is great, for it allows you to keep working in new APIs wih preferences the way it used to be, but it's not backward compatible. Since I'm trying to reach a wide range of...
How do you get a timestamp in JavaScript?
...ilanBabuškov but node.js does support Date.now()
– OrangeDog
Apr 4 '16 at 13:08
57
While +new Da...