Re: [scala-language] Understanding Java 8 Lambdas an d Streams - Part 1 - λ Calculus, λ Expressions, Syntactic Sugar, 1st Class Functions

Hi Lukas,

>you can do it in java, too, with the :: syntax
I finally got round to updating the slides:

[image: Inline images 1]


​Philip

On 22 March 2015 at 18:12, Philip Schwarz <
[email protected]> wrote:

> Hi Lukas,
>
> >higher-order functions that return functions are much less common than
> those taking a function
> any idea about the proportion of function-returning functions in the
> typical functional programmer's arsenal?
>
> >the apply method is inserted whenever a value is applied to an argument,
> the value doesn't need to have a function type
> yep
>
> >the "pure" / "impure" terminology is a bit confusing in this context.
> purity is usually used when talking about (the absence of) side effects.
> I agree..I came across the idea here:
> http://stackoverflow.com/questions/15221659/java-8-lambda-expression-and-first-class-values/15241404#15241404
>
> >you can do it in java, too, with the :: syntax
> good point!
>
> Thanks a lot for your input!
>
> Philip
>
>
> On 22 March 2015 at 09:33, Lukas Rytz <[email protected]> wrote:
>
>> 265: just a comment: higher-order functions that return functions are
>> much less common than those taking a function as argument (canonical
>> example: map)
>> 269: note that the apply method is inserted whenever a value is applied
>> to an argument, the value doesn't need to have a function type.
>> 297: the "pure" / "impure" terminology is a bit confusing in this
>> context. purity is usually used when talking about (the absence of) side
>> effects.
>> 302: you can do it in java, too, with the :: syntax ("method reference":
>> https://docs.oracle.com/javase/tutorial/java/javaOO/methodreferences.html
>> )
>>
>> Best,
>> Lukas
>>
>> On Saturday, March 21, 2015 at 1:13:17 PM UTC+1, Philip Schwarz wrote:
>>>
>>> Hi Stephen,
>>>
>>> There is a download button for the PDF.
>>>
>>> There are only 87 Powerpoint slides, but they contain animations to
>>> phase in phrases, images, etc. The animations are lost in the PDF version,
>>> but can be simulated by increasing the number of slides, which I did where
>>> the phasing in mattered.
>>>
>>> The scala Slides are  265-285 and 289-302
>>>
>>> Thanks,
>>>
>>> Philip
>>>
>>> On Saturday, 21 March 2015 04:36:25 UTC, Stephen Compall wrote:
>>>>
>>>> On Sat, 2015-03-14 at 17:06 -0700, Philip Schwarz wrote:
>>>>
>>>> Hello everyone,
>>>>
>>>>
>>>>
>>>> anyone care to comment on the Scala aspects of my talk?
>>>>
>>>>
>>>>
>>>> Could you narrow that down a bit? You have a whopping 344 slides, and
>>>> it's frightfully tedious to load and search through your presentation,
>>>> especially on a slow connection, with your chosen web service vs., say, a
>>>> downloadable PDF.
>>>>
>>>>
>>>>
>>>> --
>>>> Stephen Compall
>>>> "^aCollection allSatisfy: [:each|aCondition]": less is better
>>>>
>>>> --
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>

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