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Python function global variables?
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423
If you want to simply access a global variable you just use its name. However to change its va...
How to debug a bash script? [closed]
...s after they are expanded and before they are executed. The value of the PS4 variable is expanded and the resultant value is printed before the command and its expanded arguments.
That much does not seem to indicate different behaviour at all. I don't see any other relevant references to '-x' in...
Get Substring between two characters using javascript
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453
You can try this
var mySubString = str.substring(
str.lastIndexOf(":") + 1,
str.last...
count the frequency that a value occurs in a dataframe column
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446
Use groupby and count:
In [37]:
df = pd.DataFrame({'a':list('abssbab')})
df.groupby('a').coun...
Should I make HTML Anchors with 'name' or 'id'?
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14 Answers
14
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Common elements comparison between 2 lists
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>>> list1 = [1,2,3,4,5,6]
>>> list2 = [3, 5, 7, 9]
>>> list(set(list1).intersection(list2))
[3, 5]
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Using socket.io in Express 4 and express-generator's /bin/www
... deal: I'm trying to use socket.io in an express project. After Express Js 4 was lauched, i've updated my express-generator and now the app initial functions goes into ./bin/www file, including those vars (www file contents: http://jsfiddle.net/avMa5/ )
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Change column type from string to float in Pandas
...ring and numeric values
>>> s
0 8
1 6
2 7.5
3 3
4 0.9
dtype: object
>>> pd.to_numeric(s) # convert everything to float values
0 8.0
1 6.0
2 7.5
3 3.0
4 0.9
dtype: float64
As you can see, a new Series is returned. Remember to assign this output ...
How to select multiple rows filled with constants?
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SELECT 1, 2, 3
UNION ALL SELECT 4, 5, 6
UNION ALL SELECT 7, 8, 9
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