Yes, I said that it's *like *function composition in reverse order. And 
only if you apply the function returned by comp, as I did in my example. 
It's not to be taken too literally, but it is perhaps helpful for people 
coming from language that have function composition but no analogue to ->.

On Sunday, 14 April 2013 21:03:20 UTC+1, Marko Topolnik wrote:
>
> On Sunday, April 14, 2013 7:51:10 PM UTC+2, Matthew Hill wrote:
>
>> Function composition is done via comp. Using -> and ->> is like function 
>> composition in reverse order (though there's a difference between how the 
>> two thread return values), and often it reads more naturally.
>
>
> -> applies the functions immediately whereas comp returns a new function 
> that is the composition of its arguments. 
>
> -> works with functions of any arity; comp only with unary functions.
>
> As pointed out above, -> merely combines the unevaluated forms it is 
> given, and only if they happen to be function application forms will the 
> result be similar to function composition.
>
> -marko
>

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