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Algorithm to return all combinations of k elements from n

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Matplotlib scatter plot with different text at each data point

...s but you could use annotate() while iterating over the values in n. y = [2.56422, 3.77284, 3.52623, 3.51468, 3.02199] z = [0.15, 0.3, 0.45, 0.6, 0.75] n = [58, 651, 393, 203, 123] fig, ax = plt.subplots() ax.scatter(z, y) for i, txt in enumerate(n): ax.annotate(txt, (z[i], y[i])) There are...
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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. share | improve this answer | ...
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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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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. share | ...
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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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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? 10 Answers ...
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Calendar Recurring/Repeating Events - Best Storage Method

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Calculating arithmetic mean (one type of average) in Python

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