perl

With the small coding contest some weeks ago we got many comments and it’s worth to make a conclusion for the solutions in different languages. What language is easier to write, has better memory usage or better performance?

To clarify the question:

Remove duplicate lines from a file

We have a text file with 13 Million entries, all numbers in the range from 1.000.000 to 100.000.000. Each line has only one number. The file is unordered and we have about 1% duplicate entries. Remove the duplicates.

Be efficient with the memory usage and / or find a performant solution. The script should be started with the filename and linenumber and print the result to stdout.Read more

Finding an IP address in text or string with python is a simpler task than in java. Only the regex is not shorter than in the java regex example!

First an example with python: build a RegExp-Object for faster matching and than loop over the result iterator.

A regex like /\d+\.\d+\.\d+\.\d+/ wont work, because there match "999.999.111.000" too. But for the usage in python - that is it! Using a regular expression is more native in python than in java. Or in javascript or in perl or asp.net... Read more