On 30 November 2017 at 16:30, Iñaki Úcar wrote:
> If you really believe that references should be needed to know what to
> expect from a function call, then we work with different definitions
A behaviour of a function call might be quite complex depending on
the arguments
2017-11-30 15:54 GMT+01:00 Suzen, Mehmet :
>
>
> On 30 Nov 2017 14:32, "Iñaki Úcar" wrote:
>
>>>
>>> Am I supposed to read every reference on a man page just to know what
>>> to expect from a function?
>>>
>>
>> If the reference is from John Chamber,
On 30 Nov 2017 14:32, "Iñaki Úcar" wrote:
>>
>> Am I supposed to read every reference on a man page just to know what
>> to expect from a function?
>>
>
> If the reference is from John Chamber, you are supposed to read it.
As a joke, it's funny.
Not a joke. John Chambers
> Iñaki Úcar
> on Thu, 30 Nov 2017 14:32:12 +0100 writes:
> 2017-11-30 14:13 GMT+01:00 Suzen, Mehmet :
>> On 30 November 2017 at 14:04, Iñaki Úcar wrote:
>>>
>>> Am I supposed to read every reference on
2017-11-30 14:13 GMT+01:00 Suzen, Mehmet :
> On 30 November 2017 at 14:04, Iñaki Úcar wrote:
>>
>> Am I supposed to read every reference on a man page just to know what
>> to expect from a function?
>>
>
> If the reference is from John Chamber, you are
On 30 November 2017 at 14:04, Iñaki Úcar wrote:
>
> Am I supposed to read every reference on a man page just to know what
> to expect from a function?
>
If the reference is from John Chamber, you are supposed to read it.
It is not always possible for maintainers to document
2017-11-30 13:26 GMT+01:00 Suzen, Mehmet :
> On 30 November 2017 at 11:37, Iñaki Úcar wrote:
>> 2017-11-30 3:14 GMT+01:00 Suzen, Mehmet :
>>> My understanding is that there is no inconsistency. `is` does what it
>>> claims, from
On 30 November 2017 at 11:37, Iñaki Úcar wrote:
> 2017-11-30 3:14 GMT+01:00 Suzen, Mehmet :
>> My understanding is that there is no inconsistency. `is` does what it
>> claims, from the documentation:
>>
>> ‘is’: With two arguments, tests whether
2017-11-30 3:14 GMT+01:00 Suzen, Mehmet :
> My understanding is that there is no inconsistency. `is` does what it
> claims, from the documentation:
>
> ‘is’: With two arguments, tests whether ‘object’ can be treated as
> from ‘class2’.
>
> With one
On 29 November 2017 at 21:45, Hervé Pagès wrote:
> You're missing the point of my original post. Which is that
> there is a serious inconsistency between the unary and binary
> forms of is(). Maybe the binary form is right in case of
My understanding is that there is no
Yes, data.frame is not an S4 class but is(data.frame())
finds its super-classes anyway and without the need to wrap
it in asS4(). And "list' is one of the super-classes. Then
is(data.frame(), "list") contradicts this.
I'm not asking for a workaround. I already have one with
'class2 %in%
Hi Herve,
Interesting observation with `setClass` but it is for S4. It looks
like `data.frame()` is not an S4 class.
> isS4(data.frame())
[1] FALSE
And in your case this might help:
> is(asS4(data.frame()), "list")
[1] TRUE
Looks like `is` is designed for S4 classes, I am not entirely sure.
Hi Mehmet,
On 11/29/2017 11:22 AM, Suzen, Mehmet wrote:
Hi Herve,
I think you are confusing subclasses and classes. There is no
contradiction. `is` documentation
is very clear:
`With one argument, returns all the super-classes of this object's class.`
Yes that's indeed very clear. So if
Hi Herve,
I think you are confusing subclasses and classes. There is no
contradiction. `is` documentation
is very clear:
`With one argument, returns all the super-classes of this object's class.`
Note that object class is always `data.frame` here, check:
> class(data.frame())
[1] "data.frame"
Hi,
The unary forms of is() and extends() report that data.frame
extends list, oldClass, and vector:
> is(data.frame())
[1] "data.frame" "list" "oldClass" "vector"
> extends("data.frame")
[1] "data.frame" "list" "oldClass" "vector"
However, the binary form of is()
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