July 2020
Intermediate to advanced
608 pages
15h 43m
English
Content preview from JavaScript
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17Miscellany
In this chapter, you'll learn about the various things that didn't really fit anywhere else in the book: BigInt, new forms of numeric literals; various new Math methods; the new exponentiation operator (and a “gotcha” about its precedence); tail call optimization (including why you can't rely on it, yet or possibly ever); some other minor changes; and finally, some browser-only features added to Annex B to document what's universally there anyway.
BIGINT
BigInt1 is a new primitive type for working with large integers in JavaScript, added in ES2020.
BigInt can hold any size of integer, limited only by available memory and/or a reasonable limit imposed by the JavaScript engine's implementers. (Implementer limits are likely to be very, very high. V8 currently allows up to one billion bits.) Do you want to hold the number 1,234,567,890,123,456,789,012,345,678 (an integer with 28 significant digits) in a variable? JavaScript's normal number type (Number) can't begin to think about that, not precisely anyway; ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.