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How to convert a String to CharSequence?
...uence. It simply assigns an instance of String to a CharSequence variable, and since String implements the CharSequence interface, the code works.
– João Silva
Oct 16 '10 at 12:06
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Rounding float in Ruby
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Keep in mind that 2.3000.round(2) => 2.3 and sprintf '%.2f', 2.300 => 2.30. In my opinion this is a flaw in round(), or it should have an option to preserve trailing zeros.
– Excalibur
Feb 11 '14 at 17:06
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Profiling Django
...ngo Debug Toolbar. It will show you what queries are executed on each page and how much time they take. It's a really useful, powerful and easy to use tool.
Also, read recommendations about Django performance in Database access optimization from the documentation.
And Django performance tips by
J...
Missing return statement in a non-void method compiles
...ered a situation where a non-void method is missing a return statement and the code still compiles.
I know that the statements after the while loop are unreachable (dead code) and would never be executed. But why doesn't the compiler even warn about returning something? Or why would a language...
MySQL “WITH” clause
...RDBMS products that support common table expressions:
Oracle 9i release 2 and later:
http://www.oracle-base.com/articles/misc/with-clause.php
Microsoft SQL Server 2005 and later:
http://msdn.microsoft.com/en-us/library/ms190766(v=sql.90).aspx
IBM DB2 UDB 8 and later:
http://publib.boulder.ibm.com/i...
Making a mocked method return an argument that was passed to it
..."anotherString",mock.myFunction("anotherString"));
}
Since Mockito 1.9.5 and Java 8, you can also use a lambda expression:
when(myMock.myFunction(anyString())).thenAnswer(i -> i.getArguments()[0]);
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Using node.js as a simple web server
...pm install http-server -g
Now you can run a server via the following commands:
$ cd MyApp
$ http-server
If you're using NPM 5.2.0 or newer, you can use http-server without installing it with npx. This isn't recommended for use in production but is a great way to quickly get a server running ...
Detecting programming language from a snippet
...words. Then you compare the occurences of these words with known snippets, and compute the probability that this snippet is written in language X for every language you're interested in.
http://en.wikipedia.org/wiki/Bayesian_spam_filtering
If you have the basic mechanism then it's very easy to add...
How do I restrict a float value to only two places after the decimal point in C?
...e: round down (ie, truncate after two decimal places), rounded to nearest, and round up. Usually, you want round to nearest.
As several others have pointed out, due to the quirks of floating point representation, these rounded values may not be exactly the "obvious" decimal values, but they will b...
Python - Create list with numbers between 2 values?
...nting by 0.5, the easiest option would probably be to use numpy's arange() and .tolist():
>>> import numpy as np
>>> np.arange(11, 17, 0.5).tolist()
[11.0, 11.5, 12.0, 12.5, 13.0, 13.5,
14.0, 14.5, 15.0, 15.5, 16.0, 16.5]
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