for(var i in aArray) VS for(i=0; i<aArray.length; i++)

Question

I just want to ask if the in_array_orig and in_array_new is just the same. and also im confused on the result when comparing both array (<

Answer 1

if the in_array_orig and in_array_new is just the same

Yes, they are. (same behavior)

im confused on the result when comparing both array (aArr1 vs aArr2)

We can't compare array like this: aArr1 == aArr2