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Why does += behave unexpectedly on lists?
...gt;> a1 = a2 = [1, 2]
>>> b1 = b2 = [1, 2]
>>> a1 += [3] # Uses __iadd__, modifies a1 in-place
>>> b1 = b1 + [3] # Uses __add__, creates new list, assigns it to b1
>>> a2
[1, 2, 3] # a1 and a2 are still the same list
>>> b2
[...
What is the difference between String and string in C#?
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63 Answers
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Adding elements to object
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edited Jan 9 '13 at 12:06
answered Jan 9 '13 at 11:56
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How do I close all open tabs at once?
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31
:wqa can be simplified to just :xa
– MattK
Jan 12 '11 at 20:42
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How to return dictionary keys as a list in Python?
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answered May 29 '13 at 16:25
Chris Chris
11.8k11 gold badge1313 silver badges1616 bronze badges
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Generate a random date between two other dates
...prop(start, end, '%m/%d/%Y %I:%M %p', prop)
print(random_date("1/1/2008 1:30 PM", "1/1/2009 4:50 AM", random.random()))
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How to send a PUT/DELETE request in jQuery?
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939
You could use the ajax method:
$.ajax({
url: '/script.cgi',
type: 'DELETE',
succes...
ORA-30926: unable to get a stable set of rows in the source tables
...CT distinct ta.ROWID row_id
FROM table_1 a ,table_2 b ,table_3 c
WHERE a.mbr = c.mbr
AND b.head = c.head
AND b.type_of_action <> '6') src
ON ( a.ROWID = src.row_id )
WHEN MATCHED THEN UPDATE SET in_correct = 'Y';
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How to add include path in Qt Creator?
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232
If you are using qmake, the standard Qt build system, just add a line to the .pro file as docum...
Swift days between two NSDates
...ero) since the difference between those dates is less than 24 hours (it's 23 hours).
If your purpose is to get the exact day number between two dates, you can work around this issue like this:
// Assuming that firstDate and secondDate are defined
// ...
let calendar = NSCalendar.currentCalendar(...