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Algorithm to return all combinations of k elements from n
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What exactly does += do in python?
...num = self.num + other
return self.num
>>> a = Adder(2)
>>> a += 3
in __iadd__ 3
>>> a
5
Hope this helps.
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PostgreSQL Autoincrement
...blah');
INSERT INTO foo (bar) values ('blah');
SELECT * FROM foo;
1,blah
2,blah
SERIAL is just a create table time macro around sequences. You can not alter SERIAL onto an existing column.
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JdbcTemplate queryForInt/Long is deprecated in Spring 3.2.2. What should it be replaced by?
...ueryforInt/queryforLong methods in JdbcTemplate are deprecated in Spring 3.2. I can't find out why or what is considered the best practice to replace existing code using these methods.
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How to remove the first Item from a list?
I have the list [0, 1, 2, 3, 4] I'd like to make it into [1, 2, 3, 4] . How do I go about this?
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How can I add additional PHP versions to MAMP
The current version of MAMP that I have only has php 5.2.17 and 5.4.4. I need 5.3.X. Is there a way to add additional versions that can be selected in the MAMP interfaces php preferences? This is for the free version of MAMP, not MAMP PRO.
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Appropriate datatype for holding percent values?
...ce value (e.g. 100.00% is stored as 100.00), then you should use decimal(5,2) with an appropriate CHECK constraint. Combined with a good column name, it makes it clear to other developers what the data is and how the data is stored in the column.
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Calculating arithmetic mean (one type of average) in Python
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Calendar Recurring/Repeating Events - Best Storage Method
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Remove columns from dataframe where ALL values are NA
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