FAQ: Hashes and Symbols - Dare to Compare

Frequently Asked Questions Ruby FAQ
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This community-built FAQ covers the “Dare to Compare” exercise from the lesson “Hashes and Symbols”.

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This exercise can be found in the following Codecademy content:

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2

I notice that the time doesn’t scale linearly. When I look up b the string takes almost twice as long. When I look up f the symbol time is 0.001 s longer than string. Also, the string time is always about 0.007 s but the symbol time varies from about 0.004 to about 0.008 depending on the letter. Why is that?

3

Didn’t you JUST tell us in the previous lesson that the new syntax for symbols is a colon in front of the name? Now this very next exercise is using it behind the name?
Also, no matter what browser I use, you’re editor/site keeps disconnecting and reconnecting constantly. Not to mention throwing errors when there are none.
Who would pay for this garbage?

grades = { alice: 100,
  bob: 92,
  chris: 95,
  dave: 97
}
 
grades.select { |name, grade| grade <  97 }
# ==> { :bob => 92, :chris => 95 }
 
grades.select { |k, v| k == :alice }
# ==> { :alice => 100 }

And in the next lesson, we have it both ways…

4

Irrespective of your connection issues, the above is not a symbol, but a key.

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