4 ms·

... what? This comment is incomprehensible. What does it have to do with the parent comment (besides exemplifying the "teenager left at home for the first tim

• sergeykish 6y ago
  Do you ever type "prototype"? Do you ever type "prototype" in any language but JavaScript? How it differs from other languages accessing [[Prototype]] / class directly, not through constructor? I've thought that's caused by prototype inheritance, but no io language [1] prototype based yet easy to understand. The only difference — it does not hide [[Prototype]]. I've redefined Object and Function to show how it works. You would get same result in "dead" files. REPL to make it easy to reproduce. Imagine it is another language object.private = function () { return 'hello' } Object.shared = function () { return 'world' } Object.constructor.static = function () { return '!' } vs object.private = function() { return 'hello' } Object.prototype.shared = function () { return 'world' } Object.static = function () { return '!' } Can you see the difference? Or straight from io tutorial Contact = (class { constructor(name, address, city) { this.name = name this.address = address this.city = city } }).prototype holmes = new Contact.constructor("Holmes", "221B Baker St", "London") Contact.fullAddress = function() { return [this.name, this.address, this.city].join('\n') } holmes.fullAddress() No "prototype" (except from class but it can be redefined). > ... and that's not even what instanceof means. Thank you, it should check [[Prototype]] not constructor // Object instanceof Object Object.constructor.__proto__ === Function // Object instanceof Object Object.constructor.__proto__.__proto__ === Object // Function instanceof Function Function.constructor.__proto__ === Function // Function instanceof Object Function.constructor.__proto__.__proto__ === Object [1] https://iolanguage.org/ https://iolanguage.org/
  • pwdisswordfish4 6y ago
    ... what? > Do you ever type "prototype"? Not every day or even once in an average week, unless you're doing something wrong. > You would get same result in "dead" files. You don't understand. You shouldn't even be futzing with these things in _any_ file in the first place. Keep this sort of thing inside your REPL, and keep it out of anything checked into source control or anything distributed to other other people. 99% of ordinary LOB logic simply does not require (or justify) the use of these kinds of meta-programming facilities. Don't start using clever code reflection tricks unless you're writing a reflection framework. Dropping this highly relevant link here for the second time: https://users.dcc.uchile.cl/~rrobbes/p/EMSE-features.pdf https://users.dcc.uchile.cl/~rrobbes/p/EMSE-features.pdf > straight from io tutorial `Contact = [...]` Er... okay. In JS: class Contact { constructor(name, address, city) { this.name = name; this.address = address; this.city = city; } getFullAddress() { return this.name + "\n" + this.address + "\n" + this.city; } } let holmes = new Contact("Holmes", "221B Baker St", "London"); console.log(holmes.getFullAddress()); Prints: Holmes 221B Baker St London
    • sergeykish 6y ago
      > Not every day or even once in an average week, unless you're doing something wrong. Do you have to understand it or not? There is a ton of information on the web (viewed 191k times) [1], [2], etc. Acting like it is intuitive is disingenuous. No, that's you who don't understand. I've shown particular code that is error prone in JS but is ok in other languages. That is the issue. It is not solved. Every novice gets it. It is simple to solve. Instead you claim "you should not need this", tell it 191k viewers. Yes, you know what's going on, still you claim "you don't need this". class Foo end foo = Foo.new foo.class == Foo // metaprogramming! *You shouldn't even be futzing with these things in _any_ file* Sure I know about method definition in class. Extend it (same class). It is useful technique. And please don't post twice same if you can't read response. [1] https://stackoverflow.com/questions/9959727/proto-vs-prototype-in-javascript https://stackoverflow.com/questions/9959727/proto-vs-prototy... [2] https://javascript.info/class-inheritance https://javascript.info/class-inheritance