scratchfoundation/scratch-vm
1
0
Fork 0
mirror of https://github.com/scratchfoundation/scratch-vm.git synced 2024-12-24 06:52:40 -05:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

use Number.isNaN in Cast.toNumber

Browse source 
Number.isNaN does not coerce and may help performance since we either
do not need to coerce the value or already have with Number.
This commit is contained in:
Michael "Z" Goddard 2018-10-30 15:39:55 -04:00
parent 5b10d41ba3
commit ec414fffc6
No known key found for this signature in database
GPG key ID: 762CD40DD5349872
1 changed files with 10 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
src/util/cast.js
View file

@ -1,5 +1,13 @@
const Color = require('../util/color');
/**
* Store and possibly polyfill Number.isNaN. Number.isNaN can save time over
* self.isNaN by not coercing its input. We need to polyfill it to support
* Internet Explorer.
* @const
*/
const _NumberIsNaN = Number.isNaN || isNaN;
/**
* @fileoverview
* Utilities for casting and comparing Scratch data-types.
@ -25,14 +33,14 @@ class Cast {
if (typeof value === 'number') {
// Scratch treats NaN as 0, when needed as a number.
// E.g., 0 + NaN -> 0.
if (isNaN(value)) {
if (_NumberIsNaN(value)) {
return 0;
}
return value;
}
const n = Number(value);
if (isNaN(n)) {
if (_NumberIsNaN(n)) {
// Scratch treats NaN as 0, when needed as a number.
// E.g., 0 + NaN -> 0.
return 0;