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Computational complexity of Fibonacci Sequence
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You model the time function to calculate Fib(n) as sum of time to calculate Fib(n-1) plus the time to calculate Fib(n-2) plus the time to add them together (O(1)). This is assuming that repeated evaluations of the same Fib(n) take the same ...
How to create a fixed-size array of objects
...prites in the first 16 cells, and the last 16 cells (simulating an chess game).
8 Answers
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How to properly assert that an exception gets raised in pytest?
...Apr 24 '15 at 18:52
Murilo GiacomettiMurilo Giacometti
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What is a “callable”?
Now that it's clear what a metaclass is , there is an associated concept that I use all the time without knowing what it really means.
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Using curl to upload POST data with files
I would like to use cURL to not only send data parameters in HTTP POST but to also upload files with specific form name. How should I go about doing that ?
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Subset of rows containing NA (missing) values in a chosen column of a data frame
We have a data frame from a CSV file. The data frame DF has columns that contain observed values and a column ( VaR2 ) that contains the date at which a measurement has been taken. If the date was not recorded, the CSV file contains the value NA , for missing data.
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How to establish a connection pool in JDBC?
...tandalone connection pool, my preference goes to C3P0 over DBCP (that I've mentioned in this previous answer), I just had too much problems with DBCP under heavy load. Using C3P0 is dead simple. From the documentation:
ComboPooledDataSource cpds = new ComboPooledDataSource();
cpds.setDriverClass( "...
When to use Comparable and Comparator
...ield, say Score. Without giving much thought I wrote a new class that implements Comparator, that does the task and it works.
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Cassandra port usage - how are the ports used?
When experimenting with Cassandra I've observed that Cassandra listens to the following ports:
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How to remove application from app listings on Android Developer Console
...lication has been live on the market you cannot delete it. (Each package name is unique and Google remembers all package names anyway so you could use this a reminder)
The "Delete" button only works for unpublished version of your app. Once you published your app or a particular version of it, you c...