Discussion on: Pass By Reference Vs Pass By Value

[Andrey Smolko]

Damn, this is so brilliant comment!!!
Exactly, there are just NOT any ways to mutate primitive data type value:

let obj = {}
let obj_c = obj
let str = ''
let str_c = str
// mutate value in obj
obj[0] = 1
obj_c // {0: 1}
// try mutate value in str
str[0] = 1 // or try to mutate value in str in your own manner
str // ''
str_c // ''