Array with hole support

Question

tiansh opened this issue 8 years ago · comments

Array with last element as a hole will generate wrong output.

eval(tosource(Array(3))).length // should be 3, but get 2

Marcello Bastéa-Forte · Answer 1 · Mon Oct 17 2016 23:59:32 GMT+0800 (China Standard Time)

How would you expect this to serialize?

田生 · Answer 2 · Tue Oct 18 2016 10:06:06 GMT+0800 (China Standard Time)

Array(3) should be serialized to [, , ,].

田生 · Answer 3 · Tue Oct 18 2016 10:50:37 GMT+0800 (China Standard Time)

Marcello Bastéa-Forte · Answer 4 · Tue Oct 18 2016 12:09:53 GMT+0800 (China Standard Time)

ES2016 is a bit newer than I'm supporting… what's the browser support like?

田生 · Answer 5 · Tue Oct 18 2016 13:11:19 GMT+0800 (China Standard Time)

Actually, this behavior had been defined in ES5 (I'm not sure what ES3 does say). IE 10+ and all other browsers support it. (IE <=9 is buggy)