[zarathustreal]

Thanks for speaking up. At this point no one is really presenting any evidence so it’s a necessary evil to offset the Lisp slander even if it is, like the parent comment, not much more than an appeal to authority / popularity.

Syntax is absolutely neither natural nor unnatural, by nature, to humans, but it’s a fact that fewer symbols to memorize is easier than more symbols to memorize. The problem is a failure to launch. Some people never truly understand that it’s not just syntax, it’s semantics. Data is code, code is data. That’s why it all looks the same. This artificial distinction in “C-like languages” is more harmful for the enlightened programmer than it is helpful. Unfortunately not everyone that reads SICP experiences enlightenment the first time (or ever, I guess?)

[dbmikus]

Information hierarchies are empirically important and are an essential part of communications design. Uniform syntax makes information hierarchies harder to parse, because the boundaries around different types of information all look the same. It's the same reason we have different sized headings, bold text, etc. They are distinct markers.

So yes, fewer symbols means easier memorization, but you could take that to the extreme and you'll find that binary is harder to read than assembly.

I think Lisp is really elegant, and the power to treat a program as a data structure is very cool. But scanning Lisp programs visually always takes me a little more effort than most other languages.

[aag]

My impression has been that people complaining about Lisp's parentheses are complaining about them because they are the most obvious difference between Lisp and other languages, but that they're not what is actually causing them problems. It's the functional approach, where everything is in some sense just algebra, that really throws people off. Of course I can't see inside people's minds, but whenever I discuss this with someone for long enough, that's the impression I get.

Parentheses are just a scapegoat.

[kazinator]

People complaining about Lisp parentheses mainly just trolling, not actually working with any kind of Lisp dialect at all.

Traditional Lisps are not functional, but multi-paradigm.

Working with lists is functional though, in that operations that build larger lists out of smaller lists or atoms return a value that you must capture. You don't create an empty list with a persistent identity, which you treat as a bag. New programmers are encouraged to write "pure Lisp", which is a term that denotes list manipulation which treats cons cells as immutable (or any other objects you happen to be using, but mainly those).

Javascript treats character strings similarly the way traditional pure Lisp treats lists. You cannot mutate an existing string to add characters to it, but perform arithmetic on strings to produce new strings. Yet that doesn't prevent the adoption of Javascript. People are cheerfully doing text processing in Javascript in website after website after web application.

The most popular Lisp currently is supposedly Clojure and it is much more doggedly functional than traditional Lisps like Scheme and Common Lisp.

Nope; the parentheses thing is just pure trolling by mainly non-users.

Anyone who actually uses some kind of Lisp could easily write comments that target true weaknesses.

I suspect there is a group out there who has genuine problems with the parentheses, due to cognitive problems like dyslexia and ADHD and whatever. However, I don't see how they can do well with any programming language syntax. Show me what you do use, and how far you've gone with it before I can take you seriously about the parentheses.

[jstimpfle]

I really want to like that idea you're describing, however I've found in practice, there absolutely is a practical difference between code, data and types. I mean, they literally live in different sections of a process. If you design a program that runs on a real machine, and you spend a lot of time thinking what the program should do, how it can put the limited resources of the system to good use -- you absolutely need to think about code and data separately. Mostly think about data, really.

The one area where "code is data" remains a nice idea in my mind is for metaprogramming. And whenever I've done more metaprogramming than small doses, I've come to regret it later, no matter what the language was. (Small doses of metadata can be done even in statically typed, AOT compiled languages without RTTI).

The reason is I think, just basic data structures and simple procedures built in to a language allow you to express most everything you need, in a very direct manner. The number of distinct concepts you come up with as a programmer can usually be directly defined in the base language. Metaprogramms won't create new concepts as such, it's only code run in a different phase. There is definitely a case for generic/templated data structures but it seems it's best to use them sparingly and judiciously. Be wary of them duplicating a lot of code, fatting up and slowing down your system at compile time and/or runtime.