exploring LibURL - among vs contains and arrays

[Rodney Tamblyn]

Title: exploring LibURL - among vs contains and arrays

Thanks Phil, Mark and Scott for the responses to my sockets enquiry

Further to Scott's suggestion I've been looking through the LibURL stack.

Consider amongs vs contains:

newUrl is among the lines of the keys of tQue

"a" is among the words of "a b c d" --> true

vs:

newUrl is in the keys of tQue

the keys of tQue contains newUrl

Among operator matches a specific chunk (eg a word or a line), so is more precise.  Otherwise these commands seem analogous with each other.  Is among faster?  This isn't an operator I use very much but I think perhaps it is superior to using "in" or "contains".  Comments?

Arrays

Further to my earlier post on arrays within arrays:

While is is not possible to do this:

put "seat" into parts[a]

put parts into car[elements]

.... it is possible to do this:

put "seat" into car[elements[a]]

put "wheel" into car[elements[b]]

put car[elements[a]] #-->seat

Limitations:

- You can't retrieve a whole sub-array

put car[elements] into theElements #empty

- The keys won't show elements whose value is a sub-array

put the keys of car #no pun intended!

--> empty      

So one can build multi-dimensional arrays, but cannot put a whole array into an element of another array.

Rodney

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Rodney Tamblyn
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