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SQL JOIN vs IN performance?
...results... Which typically has better performance and why? How much does it depend on what database server you are running? (FYI I am using MSSQL)
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Why is parenthesis in print voluntary in Python 2.7?
...int is actually a special statement and not a function*.
This is also why it can't be used like: lambda x: print x
Note that (expr) does not create a Tuple (it results in expr), but , does. This likely results in the confusion between print (x) and print (x, y) in Python 2.7
(1) # 1 -- no tuple...
How are GCC and g++ bootstrapped?
...of GCC was compiled using another C compiler, since there were others when it was written. The very first C compiler ever (ca. 1973, IIRC) was implemented either in PDP-11 assembly, or in the B programming language which preceded it, but in any case the B compiler was written in assembly. Similarly,...
add column to mysql table if it does not exist
...o record in your database a revision number for the schema. Just a table with a single column and single row, with an integer indicating which revision is current in effect. When you update the schema, increment the number.
Another solution would be to just try the ALTER TABLE ADD COLUMN command....
How to recursively download a folder via FTP on Linux [closed]
...ple:
wget -r ftp://user:pass@server.com/
You can also use -m which is suitable for mirroring. It is currently equivalent to -r -N -l inf.
If you've some special characters in the credential details, you can specify the --user and --password arguments to get it to work. Example with custom login ...
How to allocate aligned memory only using the standard library?
... Google for reference. I'd like to see what the StackOverflow crew can do with it:
17 Answers
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Auto-reload browser when I save changes to html file, in Chrome?
I'm editing an HTML file in Vim and I want the browser to refresh whenever the file underneath changes.
22 Answers
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How to Loop through items returned by a function with ng-repeat?
I want to create divs repeatedly, the items is objects returned by a function. However the following code report errors:
10 $digest() iterations reached. Aborting! jsfiddle is here: http://jsfiddle.net/BraveOstrich/awnqm/
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Case statement with multiple values in each 'when' block
... when 'toyota', 'lexus'
# code
end
Some other things you can do with a Ruby case statement
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Average of 3 long integers
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This code will work, but isn't that pretty.
It first divides all three values (it floors the values, so you 'lose' the remainder), and then divides the remainder:
long n = x / 3
+ y / 3
+ z / 3
+ ( x % 3
+ y % 3
+ z...