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Creating a range of dates in Python
...oing backwards one day at a time. Here is how to take the first 3 dates:
>>> import itertools
>>> dates = itertools.islice(date_generator(), 3)
>>> list(dates)
[datetime.datetime(2009, 6, 14, 19, 12, 21, 703890), datetime.datetime(2009, 6, 13, 19, 12, 21, 703890), datetim...
SQL - HAVING vs. WHERE
....LectID=S.LectID
GROUP BY L.LectID, Fname, Lname
HAVING COUNT(S.Expertise)>=ALL
(SELECT COUNT(Expertise) FROM Lecturers_Specialization GROUP BY LectID)
This would eliminate WHERE that was used as a theta join condition.
...
Add one row to pandas DataFrame
...the row with index i will be what you specify it to be in the dataframe.
>>> import pandas as pd
>>> from numpy.random import randint
>>> df = pd.DataFrame(columns=['lib', 'qty1', 'qty2'])
>>> for i in range(5):
>>> df.loc[i] = ['name' + str(i)] + l...
Breakpoint on property change
...dard Object.watch. Hence in Firefox, you can watch for changes natively:
>>> var obj = { foo: 42 }
>>> obj.watch('foo', function() { console.log('changed') })
>>> obj.foo = 69
changed
69
However, this will be soon (late 2017) removed.
...
Auto-indent in Notepad++
... block; otherwise you can re-indent your code after the fact using TextFX > TextFX Edit > Reindent C++ code.
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Asterisk in function call
...
It splits the sequence into separate arguments for the function call.
>>> def foo(a, b=None, c=None):
... print a, b, c
...
>>> foo([1, 2, 3])
[1, 2, 3] None None
>>> foo(*[1, 2, 3])
1 2 3
>>> def bar(*a):
... print a
...
>>> bar([1, 2, 3])
([1,...
Ruby Hash to array of values
...
Also, a bit simpler....
>> hash = { "a"=>["a", "b", "c"], "b"=>["b", "c"] }
=> {"a"=>["a", "b", "c"], "b"=>["b", "c"]}
>> hash.values
=> [["a", "b", "c"], ["b", "c"]]
Ruby doc here
...
Android Studio: Module won't show up in “Edit Configuration”
...efore doing any changes to your gradle file, just close the project file-->close and then re-open the project. It may be Android Studio caching problem.
– Chanaka Fernando
May 6 '19 at 21:47
...
How to construct a set out of list items in python?
...ype "help", "copyright", "credits" or "license" for more information. >>> x = [1,2,3] >>> set(x) set([1, 2, 3]) >>>
– opus111
Dec 20 '17 at 18:49
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Removing projects in Sublime Text 2 and 3
...nes you have not deleted.
In the Sublime Text menu goto:
Project > Open Recent > Clear Items
Option 2: The manual way (but with control of which projects are removed):
Close Sublime Text
Locate the Session.sublime_session file using the paths below and open it with another c...