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Correct way to populate an Array with a Range in Ruby
I am working through a book which gives examples of Ranges being converted to equivalent arrays using their "to_a" methods
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How to convert index of a pandas dataframe into a column?
...ce=True)
so, if you have a multi-index frame with 3 levels of index, like:
>>> df
val
tick tag obs
2016-02-26 C 2 0.0139
2016-02-27 A 2 0.5577
2016-02-28 C 6 0.0303
and you want to convert the 1st (tick) and 3rd (obs) levels in the ...
How can I get the source code of a Python function?
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Rafał DowgirdRafał Dowgird
36.7k1010 gold badges7272 silver badges8989 bronze badges
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How to send a JSON object over Request with Android?
...der writing a test program to send various strings to the server until you know what format it needs to be in.
int TIMEOUT_MILLISEC = 10000; // = 10 seconds
String postMessage="{}"; //HERE_YOUR_POST_STRING.
HttpParams httpParams = new BasicHttpParams();
HttpConnectionParams.setConnectionTimeout(ht...
What are the advantages of NumPy over regular Python lists?
...t than Python lists -- a list of lists as you describe, in Python, would take at least 20 MB or so, while a NumPy 3D array with single-precision floats in the cells would fit in 4 MB. Access in reading and writing items is also faster with NumPy.
Maybe you don't care that much for just a million ce...
Path.Combine absolute with relative path strings
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What Works:
string relativePath = "..\\bling.txt";
string baseDirectory = "C:\\blah\\";
string absolutePath = Path.GetFullPath(baseDirectory + relativePath);
(result: absolutePath="C:\bling.txt")
What doesn't work
string relati...
How To Test if Type is Primitive
I have a block of code that serializes a type into a Html tag.
12 Answers
12
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When does System.gc() do something?
I know that garbage collection is automated in Java. But I understood that if you call System.gc() in your code that the JVM may or may not decide to perform garbage collection at that point. How does this work precisely? On what basis/parameters exactly does the JVM decide to do (or not do) a GC ...
Check if a temporary table exists and delete if it exists before creating a temporary table
I am using the following code to check if the temporary table exists and drop the table if it exists before creating again. It works fine as long as I don't change the columns. If I add a column later, it will give an error saying "invalid column". Please let me know what I am doing wrong.
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How do I tidy up an HTML file's indentation in VI?
...edited Dec 4 '14 at 0:23
Rory O'Kane
23.8k1111 gold badges8080 silver badges120120 bronze badges
answered May 2 '09 at 20:34
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