On: How necessary are var, let, and const?

[EugeneOZ]

Ironically enough, but your example shows where const is shouldn't be used as guarantee of immutability: https://t.co/JIQozGe7Md

[agumonkey → EugeneOZ]

Isn't that a typical "corner case" in the understanding of dynamic languages bindings ? I think I've seen the same question pop about python. The array binding is constant, its content isn't.

[EugeneOZ → agumonkey]

if value of constant can be changed, it's not constant. In my understanding. And by Wikipedia: http://en.wikipedia.org/wiki/Constant_(computer_programming)

[agumonkey → EugeneOZ]

That's typical computer lingo / semantic issue. the `const` mean shallow/pointer constant, not deep/structurally constant.

[bmeck → EugeneOZ]

const is not about immutability in JS.