September 2019
Intermediate to advanced
462 pages
11h 3m
English
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Chapter 11Internal Iteration and Lazy Evaluation
Unlike the imperative style where external iterators are prominent (see Chapter 4, External Iteration and Argument Matching), in functional programming we use internal iterators. Internal iterators put iterations on autopilot; instead of focusing on iteration, you can keep your eyes on what to do for each element in a collection or a range. As well, internal iterators avoid explicit mutability and thus the iteration can be easily parallelized without the risk of race conditions.
Internal iterators are higher-order functions; that is, we pass lambdas to functions that perform various tasks related to iteration, like selecting particular values, transforming data, and so on. The higher-order ...
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