strain: Add parameters to exercise placeholder #642

[jnaulty]

Fixes #642

[ilya-khadykin]

I like your variant, it's a good one.
But I think not everyone knows a concept of predicate. Maybe it's better to change it to lambda_expression?

The other option is to add hint for the exercise explaining a concept of predicate (preferable)

What are your thoughts on this?

[jnaulty]

Well, It seems from the problem statement that a predicate is requried. I don't really think it's necessary for the predicate to be a lambda function, it just has to be any function that takes the item from the list and returns a boolean.

I agree that a hint would be better, I found this little snippet from wikipedia:

a predicate P(x) will be true or false, depending on whether x belongs to a set.

https://en.wikipedia.org/wiki/Predicate_(mathematical_logic)

[jnaulty]

Ahh, perhaps just add the predicate definition in the README.md?

[ilya-khadykin]

I am not sure actually, since there is an ability to generate these doc files from special templates. It helps staying in sync with https://github.com/exercism/problem-specifications/ and stuff like that.

Looks like this track uses old approach and I'll have to do a bit of research on what is the best way to add hints to exercises and come back to you. Is it Ok?

[jnaulty]

ya, when I get some more time I can take a look too.

[ilya-khadykin]

@jnaulty sorry for the late reply.

Following our previous conversation, will it be possible to put hints in .meta/hint.md?

We use configlet to generate README.md files for exercises.

[ilya-khadykin]

@jnaulty I've merged your PR, thanks for your help!

I'll revisit our process of generating READMEs soon (hopefully) and move your definition you predicate in 'hints' section

[jnaulty]

thanks @m-a-ge