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Filtering a list based on a list of booleans
...0 loops, best of 3: 2.58 us per loop
>>> %timeit [i for (i, v) in zip(list_a, fil) if v] #winner
100000 loops, best of 3: 1.98 us per loop
>>> list_a = [1, 2, 4, 6]*100
>>> fil = [True, False, True, False]*100
>>> %timeit list(compress(list_a, fil)) ...
How can I beautify JavaScript code using Command Line?
...script engine, Rhino. "Install" is a little bit misleading; Download the zip file, extract everything, place js.jar in your Java classpath (or Library/Java/Extensions on OS X). You can then run scripts with an invocation similar to this
java -cp js.jar org.mozilla.javascript.tools.shell.Main na...
How can I see the size of a GitHub repository before cloning it?
...d then check the in the same place.
Somewhat hacky: use the download as a zip file option, read the file size indicated and then cancel it.
I do not remember if downloading as a zip ever worked, but in any case, doing so now only downloads the currently selected branch with no history.
...
Can I have multiple primary keys in a single table?
...ider normalizing your relation.
Example:
Person(id, name, email, street, zip_code, area)
There can be a functional dependency between id -> name,email, street, zip_code and area
But often a zip_code is associated with a area and thus there is an internal functional dependecy between zip_code ...
Mongoimport of json file
...cation to import it. D:\>mongoimport --db testimport --collection small_zip < D:\Dev\test test\small_zips.json The system cannot find the file specified. This works D:\>mongoimport --db testimport --collection small_zip < "D:\Dev\test test\small_zips.json" 2016-04-17T18:32:34.328+0800 ...
Shuffle two list at once with same order
... can do it as:
import random
a = ['a', 'b', 'c']
b = [1, 2, 3]
c = list(zip(a, b))
random.shuffle(c)
a, b = zip(*c)
print a
print b
[OUTPUT]
['a', 'c', 'b']
[1, 3, 2]
Of course, this was an example with simpler lists, but the adaptation will be the same for your case.
Hope it helps. Good L...
How do you extract a column from a multi-dimensional array?
...
check it out!
a = [[1, 2], [2, 3], [3, 4]]
a2 = zip(*a)
a2[0]
it is the same thing as above except somehow it is neater
the zip does the work but requires single arrays as arguments, the *a syntax unpacks the multidimensional array into single array arguments
...
How do I download a file over HTTP using Python?
...ogressbar"
import urllib2
url = "http://download.thinkbroadband.com/10MB.zip"
file_name = url.split('/')[-1]
u = urllib2.urlopen(url)
f = open(file_name, 'wb')
meta = u.info()
file_size = int(meta.getheaders("Content-Length")[0])
print "Downloading: %s Bytes: %s" % (file_name, file_size)
file_si...
How do you deploy your ASP.NET applications to live servers?
...project.com/KB/install/deployer.aspx
I publish website to a local folder, zip it, then upload it over FTP. Deployer on server then extracts zip, replaces config values (in Web.Config and other files), and that's it.
Of course for first run you need to connect to the server and setup IIS WebSite, d...
Apply pandas function to column to create multiple new columns?
...
I usually do this using zip:
>>> df = pd.DataFrame([[i] for i in range(10)], columns=['num'])
>>> df
num
0 0
1 1
2 2
3 3
4 4
5 5
6 6
7 7
8 8
9 9
>>> def powers(x):
>>> retur...