Python's itertools - compress(), dropwhile(), takewhile() and groupby()
In this guide, we'll take a look at how to harness the power of iterators using Python's itertools module. The itertools module provides us with an interface for creating fast and memory-efficient iterators. These iterators can be infinite, combinatoric, or terminating. Iterator vs Iterable An Iterator is an intelligent pointer...
Measuring Java Code Execution Time with Spring's StopWatch
Measuring code execution time is a vital step in trying to write efficient applications. Temporal awareness of your code on a machine that might be serving a great deal of users lets you plan further, accounting for the execution time. In multi-threaded systems, it's also useful to measure the execution...
Java 8: How to Convert a Map to List
A Java Map implementation is an collection that maps keys to values. Every Map Entry contains key/value pairs, and every key is associated with exactly one value. The keys are unique, so no duplicates are possible. A common implementation of the Map interface is a HashMap: Map<Integer,...