Why do javascript arrays allow me to use a string as a key index?

Asked Oct 21 '21 at 23:43

Active Oct 21 '21 at 23:43

Viewed 26 times

For example,

let r = [];
r['test'] = 'testvalue' // [testvalue: 321]

Arrays can be used like objects. Is that because everything in Javascript is an object, is that why arrays have that object-like functionality?

asked Oct 21 '21 at 23:43

jhaubrich.com

2

*because everything in Javascript is an object* Except primitives, but yes – CertainPerformance Oct 21 '21 at 23:45
1

Related: https://stackoverflow.com/questions/9526860/why-does-a-string-index-in-an-array-not-increase-the-length – jarmod Oct 21 '21 at 23:56

0 Answers0