I'm trying to understand the same question. Can you explain its purpose? It would seem like the list would naturally start at the 0th element and continue through, so I don't understand the point of this.

I'm trying to understand the same question. Can you explain its purpose? It would seem like the list would naturally start at the 0th element and continue through, so I don't understand the point of this.

I'm trying to understand the same question. Can you explain its purpose? It would seem like the list would naturally start at the 0th element and continue through, so I don't understand the point of this.

I'm trying to understand the same question. Can you explain its purpose? It would seem like the list would naturally start at the 0th element and continue through, so I don't understand the point of this.

somehow my brain misses chars and map :p

I didn't know it existed, but that is really useful!

The description only talks about punctuation, no intended behavior is specified for numbers (and underscores inside words can hardly be called punctuation either). So \w is prefectly acceptable here, as it's [a-b] due to lack of specification.

nothing crazy here if you are familiar with curyying and composition

spoiler flag please... (comments appear in the dshboard!)

thanks!

Thanks :)
In fact, after posting this solution I had devised some one-line solution