Search Results

3 matches found for 'pattern matching'

Square each element of a Scala list

There are two practical ways to square each element of a list, and return the new list. For example, if we input a List(5, 10), we should have a List(25, 100). Method 1: Pattern Matching def squareList(xs: List[Int]): List[Int] = xs match { case Nil => xs case y :: ys => y * y :: squareList(ys) } If xs is empty, case Nil will trigger, simply returning the list that was passed in to squareList.

December 8, 2014

String Manipulation in Python 3+

There are a few ways to search for a string in Python (3+): String operations str.find(sub[, start[, end]])] "shadow walker".find('w') => 5 This gives you the index of the first match. While the index might be nice to have, do remember that strings are immutable.

October 24, 2017

Data stores in Software Architectures

Use Cases There are many ways to store your data. In this article we'll walk through some examples of data storage in common system designs. Reminder: There is no single best storage choice and they may vary heavily depending on things such as access patterns and scale.

July 19, 2021