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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
[...
LIMIT 10..20 in SQL Server
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edited May 23 '17 at 12:26
Community♦
111 silver badge
answered Jun 9 '09 at 19:34
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Undo scaffolding in Rails
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edited Feb 12 '17 at 22:53
community wiki
8 re...
What is the difference between String and string in C#?
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63 Answers
63
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java: ArrayList - how can i check if an index exists?
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Naveed Ahmad
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answered Jan 25 '10 at 11:14
AmarghoshAmarghosh
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How do I put an 'if clause' in an SQL string?
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432
For your specific query, you can do:
UPDATE purchaseOrder
SET purchaseOrder_status = 'COMP...
Git interoperability with a Mercurial Repository
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Vadim Kotov
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answered Jun 24 '12 at 15:31
dubiousjimdubiousjim
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Dealing with “java.lang.OutOfMemoryError: PermGen space” error
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32 Answers
32
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How to check if a user is logged in (how to properly use user.is_authenticated)?
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530
Update for Django 1.10+:
is_authenticated is now an attribute in Django 1.10.
The method was re...
Android SDK manager won't open
...your java\bin directory is in your path statement before the windows\system32 directory.
The SDK Manager uses java and it was finding the one in the system32 folder.
In a CMD window, you can run 'where java'.
Don't forget to restart your CMD after changing the path variable for checking.
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