> On May 17, 2016, at 9:48 PM, Christian Robert <christian.rob...@polymtl.ca>
> wrote:
>
> Sorry, no explanations given.
>
> hook←{⍵⍶⍹⍵}
> +hook÷2
> 2.5
You can look at the definition
∇hook[⎕]∇
∇
[0] λ←(⍶ hook ⍹ ) ⍵
[1] λ←⍵⍶⍹⍵
∇
It’s a definition for an operator receiving two function arguments ⍶ and ⍹, for
which you can not do ⎕←⍹ or ⎕←⍶. The result is a monadic function with right
argument ⍵. Explicitly for the example,
+hook÷2
is equivalent to
2+÷2
> hook←{⍵⍶⍹⍵⊣⎕←⍵⊣⎕←⍶⊣⎕←⍹⊣⎕←⍵}
> +hook÷2
> 2
> DOMAIN ERROR
> hook[1] λ←⍵ ⍶ ⍹ ⍵⊣⎕←⍵⊣⎕←⍶⊣⎕←⍹⊣⎕←⍵
> ^^
> please explain the principle to a newbie.
>
> I really want a working examples.
>
>
> Xtian.
>
>
> On 2016-05-17 22:30, Xiao-Yong Jin wrote:
>> They are for direct function (operator?) definitions. Try:
>>
>> hook←{⍵⍶⍹⍵}
>> +hook÷2
>> 2.5
>>
>>> On May 17, 2016, at 8:24 PM, Christian Robert <christian.rob...@polymtl.ca>
>>> wrote:
>>>
>>> hi,
>>>
>>> in the result of "]help" I can see:
>>>
>>>
>>> λ { ... } result
>>> ⍺ { ... } left value argument
>>> ⍵ { ... } right value argument
>>> χ { ... } axis argument
>>> ⍶ { ... } left function argument
>>> ⍹ { ... } right function argument
>>>
>>>
>>> can someone explain to me the usage of ⍶ and ⍹
>>> with some examples ?
>>>
>>> I understant the first four, but not the last two.
>>>
>>> many thanks,
>>>
>>> Xtian.
>>>
>>
>>
