Using let instead of var to declare the counter in the for loop.

[MarkAdell]

Using let instead of var to declare the counter in the for loop in order to keep the counter local to the loop.

[hacksparrow]

@MarkAdell as you can see from the integration tests, let is not supported in Node 0.10 and 0.12, by default. Express aims to be very backward compatible, so 0.10 and 0.12 support is required as of the current version.

[notrab]

I can imagine the Express API being reduced with new ES6 sprinkles. It may also help adopt and push this new syntax.

But I like how Express aims to cover as much Node as possible. I think v5 could drop older Node support as v4 is very solid and will be ran alongside 5 for years in the same way 3&4 did. Be good to see what the community thinks, I think there is an issue asking for thoughts and discussion anyhow!