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Groups > comp.lang.javascript > #34883

Is JS a functional programming language? (was: Trying to create array of object literals)

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c.l.js wrote:
^^^^^^
It ill-behoves you, having so little knowledge about what you are talking 
about, to claim to speak for the entire newsgroup, and the address part of 
the “From” header of your posting is a violation of Internet standards
(RFC 5536).

You do not want anyone to report you for network abuse, do you?

> Julio Di Egidio babbled:
>> JS is a *functional* language: the modularity is modularity of *lexical*
>> constructs and contexts...  (Someone else might be able to say it
>> better.)

Modularity is not the key property of a functional programming language.
 
> Yes, JavaScript is a "functional" language. Here is an example:
> 
> class Moron {
>    constructor(name) {
>      this.name = name;
>    }
>    speak() {
>      alert(`${this.name} says:
>        "JS is a functional language."`);
>    }
> }

Note that the “speak” method of the “Moron” class is implemented as an 
*object*, a *Function* *instance*.

Note also that this does not work in several earlier implementations of 
ECMAScript, where you have to write

  function Moron (name)
  {
    this.name = name;
  }

  Moron.prototype.speak = function () {
    window.alert(this.name
      + ' says: "JS is not a functional programming language."');
  };

  (new Moron('The troll posting as "c.l.js"')).speak();

or something to that effect, instead.
 
> var Julio = new Moron('Julio');
> Julio.speak();

    [It is the standing recommendation that only class, constructor, and
     constant identifiers should start with a capital letter (after leading
     “_”s are trimmed.  “Julio” is an *instance* and a *variable*; the
     identifier should start lowercase.]

Your unnecessary insult aside:

Functional programming is a programming *paradigm*.  A functional 
programming language is a programming language where functions are first-
class objects: they can appear on the right-hand side of an assignment 
expression and/or they can be passed as arguments to other functions.  
*Functional programming is _not_, in general, a contradiction to object-
oriented programming.*

Proof that JS is/are (a) functional programming language(s) has been given 
implicitly above.  Another example:

  var f = Julio.speak;
  (function (func) { func.call({name: "Thomas ‘PointedEars’ Lahn"}); }(f));

To be more precise, implementations of ECMAScript, such as the languages 
that have “JavaScript” in their name, are procedural-imperative, functional 
and object-oriented programming languages that support both the prototype-
based and (to some extent) class-based inheritance programming paradigm.

*That* they support *all* of *those* programming paradigms, in *addition* to 
others, is an important reason for their versatility and wide distribution.

<https://en.wikipedia.org/wiki/Programming_paradigm>

See also the FAQ (referred below).

-- 
PointedEars
FAQ: <http://PointedEars.de/faq> | <http://PointedEars.de/es-matrix>
<https://github.com/PointedEars> | <http://PointedEars.de/wsvn/>
Twitter: @PointedEars2 | Please do not cc me./Bitte keine Kopien per E-Mail.

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Thread

Trying to create array of object literals bit-naughty@hotmail.com - 2018-04-12 12:17 -0700
  Re: Trying to create array of object literals bit-naughty@hotmail.com - 2018-04-12 12:26 -0700
  Re: Trying to create array of object literals Maik Koenig <usenetspam@maikkoenig.de> - 2018-04-12 21:47 +0200
  Re: Trying to create array of object literals Julio Di Egidio <julio@diegidio.name> - 2018-04-12 12:49 -0700
  Re: Trying to create array of object literals Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-13 10:27 +0200
    Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-13 10:57 +0100
      Re: Trying to create array of object literals Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-13 23:38 +0200
        Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-14 11:22 +0100
          Re: Trying to create array of object literals Julio Di Egidio <julio@diegidio.name> - 2018-04-14 07:25 -0700
            Re: Trying to create array of object literals Julio Di Egidio <julio@diegidio.name> - 2018-04-14 09:09 -0700
              Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-16 09:43 +0100
                Re: Trying to create array of object literals Julio Di Egidio <julio@diegidio.name> - 2018-04-16 02:04 -0700
                Re: Trying to create array of object literals "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-04-16 11:23 +0200
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-16 19:32 +0100
                Re: Trying to create array of object literals "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-04-17 23:37 +0200
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-18 16:18 +0100
                Re: Trying to create array of object literals "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-04-19 23:08 +0200
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-20 10:17 +0100
                Re: Trying to create array of object literals "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-04-20 12:45 +0200
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-20 19:08 +0100
              Re: Trying to create array of object literals "c.l.js" <trollhunter@curiosity.kills.no> - 2018-04-20 17:04 -0300
                Re: Trying to create array of object literals Julio Di Egidio <julio@diegidio.name> - 2018-04-20 13:15 -0700
                Is JS a functional programming language? (was: Trying to create array of object literals) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-21 02:35 +0200
                Re: Is JS a functional programming language? (was: Trying to create array of object literals) Julio Di Egidio <julio@diegidio.name> - 2018-04-21 01:36 -0700
                Re: Is JS a functional programming language? (was: Trying to create array of object literals) "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-04-21 11:46 -0700
                Re: Is JS a functional programming language? (was: Trying to create array of object literals) "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-04-21 11:48 -0700
                Re: Is JS a functional programming language? (was: Trying to create array of object literals) Julio Di Egidio <julio@diegidio.name> - 2018-04-21 23:53 -0700
                Re: Is JS a functional programming language? (was: Trying to create array of object literals) "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-04-22 10:33 -0700
                Re: Is JS a functional programming language? (was: Trying to create array of object literals) Julio Di Egidio <julio@diegidio.name> - 2018-04-23 00:27 -0700
                Re: Is JS a functional programming language? (was: Trying to create array of object literals) "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-04-23 11:50 -0700
                Re: Is JS a functional programming language? (was: Trying to create array of object literals) Julio Di Egidio <julio@diegidio.name> - 2018-04-23 12:00 -0700
                Re: Is JS a functional programming language? (was: Trying to create array of object literals) "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-04-23 15:07 -0700
                Re: Is JS a functional programming language? "Christoph M. Becker" <cmbecker69@arcor.de> - 2018-04-24 00:47 +0200
                Re: Is JS a functional programming language? Julio Di Egidio <julio@diegidio.name> - 2018-04-23 16:12 -0700
                Re: Is JS a functional programming language? "Christoph M. Becker" <cmbecker69@arcor.de> - 2018-04-24 01:30 +0200
                Re: Is JS a functional programming language? Julio Di Egidio <julio@diegidio.name> - 2018-04-23 16:45 -0700
                Re: Is JS a functional programming language? John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-24 09:54 +0100
                Re: Is JS a functional programming language? Tim Streater <timstreater@greenbee.net> - 2018-04-24 10:17 +0000
                Re: Is JS a functional programming language? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-04-24 12:02 -0700
                Re: Is JS a functional programming language? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-25 05:04 +0200
                Re: Is JS a functional programming language? Julio Di Egidio <julio@diegidio.name> - 2018-04-25 02:16 -0700
                Re: Is JS a functional programming language? Julio Di Egidio <julio@diegidio.name> - 2018-04-25 02:20 -0700
                Re: Is JS a functional programming language? John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-25 18:22 +0100
                Re: Is JS a functional programming language? Jon Ribbens <jon+usenet@unequivocal.eu> - 2018-04-25 17:25 +0000
                Re: Is JS a functional programming language? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-04-25 14:50 -0700
                Re: Is JS a functional programming language? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-04-25 14:39 -0700
                Re: Is JS a functional programming language? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-29 20:44 +0200
                Re: Is JS a functional programming language? "Michael Haufe (TNO)" <tno@thenewobjective.com> - 2018-04-29 13:45 -0700
                Re: Is JS a functional programming language? "c.l.js" <trollhunter@curiosity.kills.no> - 2018-04-21 19:51 -0300
                Re: Is JS a functional programming language? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-22 01:18 +0200
                Re: Is JS a functional programming language? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-22 02:19 +0200
                Re: Is JS a functional programming language? "Mark-" <nospam@mapson.xyz> - 2018-04-22 01:52 +0000
                Re: Is JS a functional programming language? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-22 04:30 +0200
                Re: Is JS a functional programming language? "Mark-" <nospam@mapson.xyz> - 2018-04-22 02:45 +0000
                Re: Is JS a functional programming language? Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-22 05:55 +0200
                Re: Is JS a functional programming language? "Mark-" <nospam@mapson.xyz> - 2018-04-22 04:04 +0000
                Re: Is JS a functional programming language? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-04-22 10:59 +0200
                Re: Is JS a functional programming language? John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-22 11:03 +0100
                Re: Is JS a functional programming language? "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-04-22 12:50 +0200
                Re: Is JS a functional programming language? John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-23 09:19 +0100
                Re: Is JS a functional programming language? "Mark-" <nospam@mapson.xyz> - 2018-04-22 12:58 +0000
            Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-16 10:02 +0100
              Re: Trying to create array of object literals Julio Di Egidio <julio@diegidio.name> - 2018-04-16 02:05 -0700
                Re: Trying to create array of object literals "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-04-16 11:27 +0200
                Re: Trying to create array of object literals Julio Di Egidio <julio@diegidio.name> - 2018-04-16 02:33 -0700
                Re: Trying to create array of object literals "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2018-04-16 14:03 +0200
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-16 19:40 +0100
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-17 09:45 +0100
                Re: Trying to create array of object literals Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-18 03:25 +0200
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-18 15:50 +0100
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-18 16:08 +0100
                Re: Trying to create array of object literals Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-19 03:34 +0200
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-19 10:37 +0100
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-19 19:02 +0100
                Re: Trying to create array of object literals Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2018-04-19 03:25 +0200
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-16 19:37 +0100
                Re: Trying to create array of object literals Julio Di Egidio <julio@diegidio.name> - 2018-04-16 11:48 -0700
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-17 09:52 +0100
                Re: Trying to create array of object literals Julio Di Egidio <julio@diegidio.name> - 2018-04-17 03:22 -0700
                Re: Trying to create array of object literals John G Harris <niam@jghnorth.org.uk.invalid> - 2018-04-17 18:28 +0100
    Re: Trying to create array of object literals bit-naughty@hotmail.com - 2018-04-13 04:08 -0700

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