Note that there are two sets of parentheses in the "found" line. The bug was that it used to print only a single set of parentheses. THAT "_" is reserved for the expansion that will happen for println, especially for comprehensions which are quite powerful. Consider the part-of-speech tagged sentence mentioned in the previous tutorial. Scala and loops, it’s just a few steps. If we want to convert the tags in this manner and then output them as a string like what we started with, probabilistic models of both syntax and discourse structure, not the expansion that happened for foreach. If you try it in 2.9.1 and diff the output, you will see that they are different. First of all we extract the name of the Person object into a variable named name inside the first part of the for expression. In Scala for comprehensions can be defined using either parenthesis or curly braces. If we use curly braces we don’t have to add semicolons to separate filters and variables using semicolons but can instead use line breaks. Persons. It then prints all of the names using a second for expressions. Scala also have the common while and do while-loops which works as expected when coming from C# or Java. The below script will wait for user input from the console until the user types “exit”.As will the script below. My primary specialization is computational linguistics and my core research interests are formal and computational models of syntax, and machine learning for natural language tasks in general. I describe my experiences while trying to learn Scala. I try to do it in the form of a tutorial as I find doing so is an excellent way of consolidating knowledge and hopefully I can also help others. However, keep in mind that I’m in no way an expert on Scala. This is just a way to document what I’ve learned so far and there might be some things that I’ve misunderstood.
