Most idiomatic Civet for indexing an array by an array of indices?

[gwhitney]

Suppose I have an array fruit := ['apples', 'oranges', 'pears', 'bananas', 'mangoes'] and an array IX := [1,3,0,3] and I'd like to index fruit by each element of IX to get ['oranges', 'bananas', 'apples', 'bananas']. What's the nicest/most Civetitious way to do this?

I've thought of IX.map ($) => fruit[$] but there it's sort of annoying that I can't just do IX.map fruit[&] (at least not unless there's some motion on #480). Also, this seems to put the emphasis on IX when conceptually fruit is more the "subject of this sentence." I'd rather write something more along the lines of fruit[IX] although of course I know that doesn't work. There isn't any notion for this sort of "random-access slice," is there? From the perspective of emphasizing the fruit, [0...IX.length].map ($) => fruit[IX[$]] is kind of better, but it's sort of verbose/klunky, too, and I imagine a bit less efficient if I am doing a big case of this.

So at the moment I am just doing:

by := (arr, ixes) => ixes.map ($) => arr[$]
operator by 

and then writing fruit by IX. Have I missed anything nicer?

[bbrk24]

Also, this seems to put the emphasis on IX when conceptually fruit is more the "subject of this sentence."

Isn't that what the pipe operator is for?

((i) -> fruit[i]) |> IX.map

[gwhitney]

That's not a bad suggestion, thanks! But after noodling around a bit, I think I like fruit[ix] for each ix of IX a bit better. Although it uses a lot of words, it more comfortably for me captures what I feel like I am doing conceptually.