A Simple Example
Let’s start with a simple iteration: given a list of stock prices, we’d like to print each price on a separate line.
Initially, the traditional for loop comes to mind, something like this in Java:
| for(int i = 0; i <= prices.size(); i++) |
Or is it < instead of <= in the loop condition?
There is no reason to burden ourselves with that. We can just use the for-each construct in Java, like so:
| for(double price : prices) |
Let’s follow this style in Scala:
| val prices = List(211.10, 310.12, 510.45, 645.60, 832.33) |
| for(price <- prices) { |
| println(price) |
| } |
Scala’s type inference determines the type of the prices list to be List[Double] and the type of price to be Double. The previous style of iteration is often referred ...
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