[R] Basic Question on Keys/Values

[Dumblauskas, Jerry]

As a java programmer, I'm having issue conceptualizing the following use
case:

Given an value, passed into a function, how do I pull out the lookup?

Ie.
A list of keys (key1, key2, key3)
A list of values (val1,val2,val3)

I want to write a function (or is there something built in?) such that

Callit <- (thekey) {
(magic happens here)
Return value
}

Any ideas?

Thanks a bunch!

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