Title: Search Strings Using Regex
Slug: search_strings_with_regex
Summary: Search Strings Using Regex Using Scala.
Date: 2017-01-03 12:00
Category: Scala
Tags: Basics
Authors: Chris Albon

This tutorial was inspired by the awesome Scala Cookbook.

Create A String



In [23]:

    
// Create a string value
val attack_order : String = "Our 382 troops will attack their east flank at dawn. They have 28 troops there."

Create A Regex Pattern



In [24]:

    
// Create a value that is a regex pattern
val find_numbers = "[0-9]+".r

Find First Match



In [27]:

    
// Apply the regex to find the first match, output the result, otherwise output "None"
find_numbers.findFirstIn(attack_order).getOrElse("None")









    Out[27]:





382

Find All Matches



In [28]:

    
// Apply the regex to find all matches and output to an array
find_numbers.findAllIn(attack_order).toArray









    Out[28]:





Array(382, 28)