April 2023
Intermediate to advanced
614 pages
12h 41m
English
Content preview from Mastering JavaScript Functional Programming - Third Edition
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5
Programming Declaratively – A Better Style
Up to now, we haven’t really been able to appreciate the possibilities of functional programming (FP) as it pertains to working in a higher-level, declarative fashion. In this chapter, we will correct this and start producing shorter, more concise, and easier-to-understand code, by using some higher-order functions (HOFs) —that is, functions that take functions as parameters, such as the following:
- reduce() and reduceRight() to apply an operation to a whole array, reducing it to a single result
- map() to transform one array into another by applying a function to each of its elements
- flat() to make a single array out of an array of arrays
- flatMap() to mix together mapping and flattening
- forEach()
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