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

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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