proposal: String.prototype.padCenter

Thu Aug 23 07:27:44 UTC 2018

Then it should be probably like:

```js
String.prototype.padCenter = function(maxLength [, padStringLeft = " " [,
padStringRight = padStringLeft]]){}
```

but in locales where the text is right to left might be confusing, so since
the left/right thing is a very specialized use case, I'd personally keep it
simple and accept only one `pad` parameter, not two.

Regards

On Thu, Aug 23, 2018 at 3:49 AM Ricardo Zorzal <ricardozorzal at hotmail.com>
wrote:

>
> Like Nicolò said, it could be useful to make more pretty print to the
> terminal(Node.js), and also in the console(browser).
>
> I think it can be useful for hide informations about id's
>
> ```javascript
> "12049393823947".substr(3,6).padCenter(14,'*');
> //result: "****493938****"
> ```
>
> Other use case that I thought is to customize titles with some custom
> characters like:
>
> ```javascript
> "MY TITLE".padCenter(14,'~');
> //result: "~~~MY TITLE~~~"
> ```
>
> In addition, it can make logs more readable too.
>
> So, maybe this feature should had three arguments:
>
> ```javascript
> String.prototype.padCenter = function(maxLength [, padStringLeft,
> padStringRight]){}
> ```
>
> "padStringLeft" as the string that fills the left part and as
> "padStringRight" that fills the right part.
>
> Att,
>
> *Ricardo Zorzal Davila *
> ------------------------------
> *De:* Nicolò Ribaudo <nicolo.ribaudo at gmail.com>
> *Enviado:* quarta-feira, 22 de agosto de 2018 14:18
> *Para:* Naveen Chawla
> *Cc:* Ricardo Zorzal; es-discuss at mozilla.org
> *Assunto:* Re: proposal: String.prototype.padCenter
>
> It can also be quite useful in Node, to center things printed to the
> terminal.
>
> Il mer 22 ago 2018, 17:57 Naveen Chawla <naveen.chwl at gmail.com> ha
> scritto:
>
> Isn't "bluetooth printer" too niche a use case? Any other examples?
>
> On Wed, 22 Aug 2018 at 17:59 Ricardo Zorzal <ricardozorzal at hotmail.com>
> wrote:
>
>
> Isiah Meadows , don't have any problems in combine this two functions, but
> if it can be done with a native functions it could pass more confiability
> to javascript functions, avoiding polyfills, like I do.
>
> In the past, when we did not had padStart and padEnd, we were using some
> polyfills functions to construct this two functions for us, then the
> comunity looked at this features and then started to implementing it. BTW,
> I do not know why we did not implementing this function when the padStart e
> padEnd was developed too.
>
> And again, I think it's not hard to be done, but necessary. And Claude
> Pache, thanks for your exemple.
>
> Naveen Chawla, yes this is the idea, as the same as the other "pad"
> functions, and look at the exemple from Claude Pache, it can be done like
> he coded.
>
> I hope you guys understending that this is necessary to growth the
> language and make it more pratical than now.
>
> Perhaps has other developers searching for this solution and they seen it
> in libs, polyfills and frameworks, but they do not like the idea to import
> other lib in the project just to use this feature.
>
> And again, it seems not hard to be done.
>
>
> Att,
>
> *Ricardo Zorzal Davila *
> ------------------------------
> *De:* es-discuss <es-discuss-bounces at mozilla.org> em nome de Claude Pache
> <claude.pache at gmail.com>
> *Enviado:* quarta-feira, 22 de agosto de 2018 04:49
> *Para:* Naveen Chawla
> *Cc:* es-discuss at mozilla.org
> *Assunto:* Re: proposal: String.prototype.padCenter
>
> ```js
> x.padStart((x.length + 32)/2).padEnd(32)
> ```
>
> (BTW, I don’t like this habit of top-posting the reply. Please look below
> for the question I’m answering, and read the mail backwards for more
> context.)
>
> —Claude
>
> Le 22 août 2018 à 05:47, Naveen Chawla <naveen.chwl at gmail.com> a écrit :
>
> How would you combine padStart and padEnd to get the desired result? Just
> curious, because the idea would be to create a minimum of 32 chars with the
> original string centered inside the "padding" (if there is any)
>
> On Wed, 22 Aug 2018 at 07:26 Isiah Meadows <isiahmeadows at gmail.com> wrote:
>
> What's wrong with combining `padStart` with `padEnd`? I'm not sure this is
> worth it, since you can easily emulate it anyways (as you stated).
> On Tue, Aug 21, 2018 at 16:44 Ricardo Zorzal <ricardozorzal at hotmail.com>
> wrote:
>
> Hello guys, I here to talk about padStart, padEnd and my new proposal
> "padCenter", I think it is not hard to develop because we already had
> padStart and padEnd.
>
> I thought that we need to add one more feature to String's prototype, and
> it is not a hard work. So the proposal is to create the
> String.prototype.padCenter that centralize a string with a max character
> lenght, equals we do when call the "pad" functions.
>
> For exemple, when we call padStart
>
> ```javascript
> "MY-TEST".padStart(32)
> //result: "                         MY-TEST"
> ```
>
> and when we call padEnd:
>
> ```javascript
> "MY-TEST".padEnd(32)
> //result: "MY-TEST                         "
> ```
>
> how about that:
>
> ```javascript
> "MY-TEST".padCenter(32)
> //result: "            MY-TEST            "
> ```
>
> I'm searching it for a long time and I seen people talking about it in
> different use cases. But for me it will be usefull when I need to send some
> text data to my bluetooth printer, becouse the length of his line is 32 and
> I need to centralize the data and adjust the line to right and left.
>
> I think this feature can improve the language and it will be useful for
> other developers like me.
>
> Although we has libs that has an implementation of it
> https://lodash.com/docs#pad
> http://gabceb.github.io/underscore.string.site/#pad
> https://vocajs.com/#pad
> I think it can be done for native functions too
>
> And it is native for other languages, such as:
>     1. PHP (
> https://www.w3schools.com/php/showphp.asp?filename=demo_func_string_str_pad3
> )
>     2. Python (https://docs.python.org/2/library/string.html#string.center
> )
>     3. Ruby (https://ruby-doc.org/core-2.2.0/String.html#center-method)
>     4. R (
> https://www.rdocumentation.org/packages/stringr/versions/1.3.1/topics/str_pad
> )
>     5. etc...
>
>
> What do you guys think ?
>
> ( We can call it "pad" instead of "padCenter"  haha )
>
>
> Att,
>
> *Ricardo Zorzal Davila *
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