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Can existing virtualenv be upgraded gracefully?
I have a virtualenv created for Python 2.5 and want to "upgrade" it to Python 2.6.
5 Answers
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How to merge 2 List and removing duplicate values from it in C#
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295
Have you had a look at Enumerable.Union
This method excludes duplicates from the return set. ...
How to join two sets in one line without using “|”
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320
You can use union method for sets: set.union(other_set)
Note that it returns a new set i.e it ...
Why does direction of index matter in MongoDB?
... ascending the index might look something like this:
Row A B
1 1 1
2 2 6
3 2 7
4 3 4
5 3 5
6 3 6
7 5 1
A query for A ascending B descending will need to jump around the index out of order to return the rows and will be slower. For example it will return Row 1, 3, 2...
How to use a custom comparison function in Python 3?
In Python 2.x , I could pass custom function to sorted and .sort functions
6 Answers
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How to do a batch insert in MySQL
...nd separated by commas.
Example:
INSERT INTO tbl_name (a,b,c) VALUES(1,2,3),(4,5,6),(7,8,9);
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What are file descriptors, explained in simple terms?
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12 Answers
12
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Map Tiling Algorithm
...are already found in the first square. This means that there in total are 12 different cases we must distinguish between.
Now, looking at one edge tile we can determine which way the boundary turns by looking at its four closest neighbour tiles. Marking an edge tile with X just as above we have the...
Bare asterisk in function arguments?
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232
Bare * is used to force the caller to use named arguments - so you cannot define a function wi...
Difference between HTML “overflow : auto” and “overflow : scroll”
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Johan DavidssonJohan Davidsson
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