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nil IS a list...

tweeks 
ddGetObjChildren( 
b_objId 
) 
=> l_children | nil

When you say l_children, isn't it already implied that the list could be empty?  After all, if the object has no children, then you get nil, which is just a zero-length list of children.  So shouldn't the return type be simply l_children, like this:

ddGetObjChildren( 
b_objId 
) 
=> l_children

Just sayin'....

Parents
  • Andrew Beckett said:

    If looking for any nils present in the list, I would use:

    (forall elem lst elem)

    as that's probably more expressive than (apply or ...). 

    Oh yeah.... and forall would handle longer lists too, due to the arglist length limitations of apply.

    Andrew Beckett said:

    In general I always advise against overuse of macros. Peter Norvig makes a good point in Paradigms of Artificial Intelligence Programming about this.

    Ha I just got that book!  Judging from my preliminary skimming, it looks truly hardcore.  I like that Norvig explains the true origins of lambda on p.20, going all the way back to Russel & Whitehead's caret notation in Principia Mathematica. 

    Andrew Beckett said:

    And yes, that is two pence or "tuppence" (with a u rather than an o)!

    Reminds me of the "feed the birds" song from Mary Poppins, which is one of my primary sources for information on life in the UK, along with Top Gear and Doctor Who. 

    Is your hometown pronounced like "berk-shy-er" or "berk-sure"?

Reply
  • Andrew Beckett said:

    If looking for any nils present in the list, I would use:

    (forall elem lst elem)

    as that's probably more expressive than (apply or ...). 

    Oh yeah.... and forall would handle longer lists too, due to the arglist length limitations of apply.

    Andrew Beckett said:

    In general I always advise against overuse of macros. Peter Norvig makes a good point in Paradigms of Artificial Intelligence Programming about this.

    Ha I just got that book!  Judging from my preliminary skimming, it looks truly hardcore.  I like that Norvig explains the true origins of lambda on p.20, going all the way back to Russel & Whitehead's caret notation in Principia Mathematica. 

    Andrew Beckett said:

    And yes, that is two pence or "tuppence" (with a u rather than an o)!

    Reminds me of the "feed the birds" song from Mary Poppins, which is one of my primary sources for information on life in the UK, along with Top Gear and Doctor Who. 

    Is your hometown pronounced like "berk-shy-er" or "berk-sure"?

Children
No Data

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