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Groups > comp.lang.javascript > #34335

Re: get average height in an object

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Joao Rodrigues wrote:

> Thomas 'PointedEars' Lahn wrote:
>> Joao Rodrigues wrote:
>>> Thomas 'PointedEars' Lahn wrote:
>>>> Joao Rodrigues wrote:
>>>>> JRough wrote:
>>>>>> This seems like it should be easy enough but I don't get any error
>>>>>> messages in the console.  I used jslint and it objects to the
>>>>>> console.log lines
>>>>> This happens because "console" is a browser (and Node.js) feature.
>>>>> However, you may use the /*global*/ directive to "hide" the error in
>>>>> JSLint [1]. For instance:
>>>>> /*global console */
>>>> Too sweeping, unless we are talking about a dedicated debug library.
>>> Useless remark since I wrote about a JSLint warning. It has nothing to
>>> do with libraries whatsoever. Don't miss the point.
>> *You* are missing the point.  If you annotate the code as such, then
>> *all* uses of console.log() will be ignored.  This is potentially
>> *detrimental* to code quality.
> 
> I doubt an experienced developer would use: (1) console.log() in
> production code,

Which shows that, at the very least, you are not an experienced developer 
yourself.  *In the right places*, console.log() can be and *is* *very 
useful* even in production code.

The very point of linters like JSLint is to make sure that it does not 
appear *unintentionally* in *production* code, as a remnant of debug code.

Annotating “console” as an implicit global for the whole file, as you 
suggested, *counteracts* this benefit.  (Except, AISB, if it is a *debug* 
library.)

> (2) an obsolete and opinionated linter such as JSLint.

The same is true for other linters *by default*, so that argument does not 
hold water.

> Anyway it's up to the OP to decide what to do. I was only commenting
> about the specific OP's problem regarding JSLint.

In doing so, however, you have made claims about the programming language 
and about its objects which are provably false.

>>>>> As a side note there are better JS linters such as ESLint and JSHint.
>>>> JSHint (which I prefer) will also warn about the undeclared use of
>>>> console.log().
>>> Of course ESLint, JSHint and JSLint warn about undeclared use of
>>> 'console' and its methods. JS Linters 101.
>> That is simply untrue.  As I have showed, it depends on the
>> configuration.
> 
> The default configuration of all those linters will warn about the use
> of console.log() (and missing semicolons where they are expected).

But this is a fundamentally different statement than the one that you made 
before.

>>>>>> and it says it needs a semi colon after the data  object?
>>>>> Sure does. A semicolon is required in the end of a statement.
>>>> No, in general it is not.
>>> Nonsense. If semicolons were really optional there would not be a thing
>>> called "Automatic Semicolon Insertion" (ASI) in the Specification, which
>>> states:
>> You have no clue what you are talking about.
> 
> You too!

LOL.

>>> <http://www.ecma-international.org/ecma-262/6.0/#sec-automatic-semicolon-insertion>
>>> Omitting semicolons does not mean they are optional in the Language.
>> Yes, it means exactly that.
> 
> It's obvious.

Apparently you misunderstand my “Yes” to mean confirmation of your opinion 
when it means the exact opposite.

>>> Look up the Standard and you will not find the term "optional" for
>>> semicolons.
>>> ECMAScript Language Specification 101.
>> You have claimed that *source code* would _not_ *work* if it had no
>> semicolons.
> 
> No, I haven't.

Yes, you have.  You did it *again* when you referred to the language 
specification in that way, which is completely irrelevant here, so you 
cannot talk your way out of it now.

>>>>> You don't really need to check for data.hasOwnProperty(key) in this
>>>>> case, because data is a simple dictionary-like object [2].
>>>> Nonsense, and your source does not corroborate your claim.
>>>>
>>>> The value of the “data” constant *variable* here is a reference to an
>>>> Object instance which inherits properties from the object referred to
>>>> by the initial value of Object.prototype
>>> Prototypal inheritance is a known concept by everyone here.
>> Not to you, obviously.
> 
> Why "obviously"?!

  const data = {
    "foo": "bar",
    "baz": "bla"
  };

  /* "function" */
  console.log(typeof data["toString"]);

  /* "function" */
  console.log(typeof data["valueOf"]);

  /* "object" (in some implementations) */
  console.log(typeof data["__proto__"]);

A “dictionary-like object” (this was the term that *you* used) simply
does _not_ behave in that way.

Subsequently, I have elaborated on how such an object can actually be 
created.  You called that “drivel”.

> Your logic is flawed.

No, yours is.

-- 
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

get average height in an object JRough <janis.rough@gmail.com> - 2017-11-11 14:57 -0800
  Re: get average height in an object Joao Rodrigues <groups_jr-1@yahoo.com> - 2017-11-12 06:04 -0200
    Re: get average height in an object Joao Rodrigues <groups_jr-1@yahoo.com> - 2017-11-12 06:49 -0200
    Re: get average height in an object John G Harris <niam@jghnorth.org.uk.invalid> - 2017-11-12 13:39 +0000
    Re: get average height in an object Joao Rodrigues <groups_jr-1@yahoo.com> - 2017-11-12 13:40 -0200
      Re: get average height in an object JRough <janis.rough@gmail.com> - 2017-11-13 12:06 -0800
      Re: get average height in an object Joao Rodrigues <groups_jr-1@yahoo.com> - 2017-11-15 13:14 -0200
        Re: get average height in an object "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-11-15 22:21 +0100
          Re: get average height in an object "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-11-15 22:57 +0100
            Re: get average height in an object Joao Rodrigues <groups_jr-1@yahoo.com> - 2017-11-16 02:46 -0200
              Re: get average height in an object "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-11-17 13:06 +0100
    Re: get average height in an object Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-11-12 18:24 +0100
      Re: get average height in an object Joao Rodrigues <groups_jr-1@yahoo.com> - 2017-11-13 00:26 -0200
        Re: get average height in an object Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-11-13 03:42 +0100
          Re: get average height in an object Joao Rodrigues <groups_jr-1@yahoo.com> - 2017-11-13 01:23 -0200
            Re: get average height in an object Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-11-13 14:16 +0100
              Re: get average height in an object Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2017-11-13 14:20 -0300
                Dictionary-like objects (was: get average height in an object) Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-11-13 19:56 +0100
                Re: Dictionary-like objects Joao Rodrigues <groups_jr-1@yahoo.com.br> - 2017-11-13 20:26 -0200
                Re: Dictionary-like objects Julio Di Egidio <julio@diegidio.name> - 2017-11-13 15:48 -0800
                Re: Dictionary-like objects Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2017-11-15 02:55 +0100
                Re: Dictionary-like objects Joao Rodrigues <groups_jr-1@yahoo.com> - 2017-11-15 12:30 -0200
                Re: Dictionary-like objects John G Harris <niam@jghnorth.org.uk.invalid> - 2017-11-15 15:59 +0000
        Re: get average height in an object JRough <janis.rough@gmail.com> - 2017-11-13 12:08 -0800
      Re: get average height in an object John G Harris <niam@jghnorth.org.uk.invalid> - 2017-11-13 10:17 +0000
      Re: get average height in an object JRough <janis.rough@gmail.com> - 2017-11-13 12:07 -0800
  Re: get average height in an object "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-11-12 11:00 +0100
    Re: get average height in an object "Evertjan." <exxjxw.hannivoort@inter.nl.net> - 2017-11-12 11:15 +0100
    Re: get average height in an object JRough <janis.rough@gmail.com> - 2017-11-13 12:28 -0800

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