May 2018
Intermediate to advanced
190 pages
2h 19m
English
book
Practical ES6
by Aurelio De Rosa, Kyle Pennell, Nilson Jacques, Craig Buckler, Byron Houwens, Jeff Mott, Sandeep Panda, Graham Cox, Ludovico Fischer, James Wright
Content preview from Practical ES6
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Chapter 5: New Number Methods
by Aurelio de Rosa
This chapter covers new and improved number methods in ES6 (ECMAScript 6).
I’ll introduce you to the new methods and constants added to the Number data type. Some of the number methods covered, as we’ll see, aren’t new at all, but they’ve been improved and/or moved under the right object (for example, isNaN()). As always, we’ll also put the new knowledge acquired into action with some examples. So, without further ado, let’s get started.
Number.isInteger()
The first method I want to cover is Number.isInteger(). It’s a new addition to JavaScript, and this is something you may have defined and used by yourself in the past. It determines whether the value passed to the function is an integer or not. ...
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