Functional Thinking by Neal Ford

Author:Neal Ford
Language: eng
Format: epub, mobi, pdf
ISBN: 9781449365516
Publisher: O’Reilly Media, Inc.
Published: 2014-09-09T16:00:00+00:00

In Example 4-22, pulling one million words from the collection via the take method will be quite inefficient, especially if the goal is to find the first palindrome. To convert the words collection to a lazy one, use the view method:

findPalindrome(words.view take 1000000)

The view method allows lazy traversal of the collection, making for more efficient code.

Lazy Field Initialization

Before leaving the subject of laziness, I’ll mention that two languages have a nice facility to make expensive initializations lazy. By prepending lazy onto the val declaration, you can convert fields in Scala from eager to as-needed evaluation:

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