ruby inject recursion?
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Matt Humphrey
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Published on 2011-02-15T07:22:20Z
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2011/02/15
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the goal is to start with ['a','b','c'] and end up with {'a'=>{'b'=>{'c'=>{}}}}
so, getting my bearings, i did this:
ruby-1.8.7-p174 > ['a','b','c'].inject({}){|h,v| h.update(v => {})} => {"a"=>{}, "b"=>{}, "c"=>{}}
and then figured, if i actually pass on the result hash, it will recurse and nest, but:
ruby-1.8.7-p174 > ['a','b','c'].inject({}){|h,v| h.update(v => {}); h[v]} => {}
why is this? any idea how to achieve the desired result in an elegant one-liner?
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