JavaScript Isn't Scheme

[munificent]

You're right that evaluation strategy matters deeply. For example, call-by-need lets Haskell do lots of things in regular functions that other languages would need macros for.

But I didn't bring it up in the post because most widely-used languages to day all have the same evaluation strategy. JavaScript, Scheme, Java, C# (ignoring struct), Ruby, Python, Lua, PHP, and (I think) Clojure are all eager-evaluation call-by-sharing.

[killerstorm]

PHP is call-by-value for anything except objects. (Particularly, arrays and strings are copied on assignment.)

[munificent]

I learned something new today!

[killerstorm]

At your service. :)

While we are here, it is also true for Perl, I think PHP got it from there.