January 2019
Beginner
210 pages
4h 47m
English
Content preview from Hands-On Functional Programming with TypeScript
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Point-free style
Point-free style, also known as Tacit programming, is a programming style in which function declarations do not declare the arguments (or points) on which they operate.
The following code snippet declares a few functions that are used to determine whether a person is eligible to vote in elections:
interface Person { age: number; birthCountry: string; naturalizationDate: Date;}const OUR_COUNTRY = "Ireland";const wasBornInCountry = (person: Person) => person.birthCountry === OUR_COUNTRY;const wasNaturalized = (person: Person) => Boolean(person.naturalizationDate);const isOver18 = (person: Person) => person.age >= 18;const isCitizen = (person: Person) => wasBornInCountry(person) || wasNaturalized(person);const isEligibleToVote ...Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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