Re: bsearch on partial array elements

[Jon.Paris@xxxxxxxxxx]

 >> Any ideas how I can get round this without creating more arrays ?

 As you know bsearch passes two pointers to your compare procedure - one to the
search key and one to the candidate field.  These pointers can be used to base
_anything_ a field, an array, or a DS.  Instead of using the pointer to base a
field (as I suspect you are now) you could base a DS which defined two
subfields.  The being your comparison field and the second the balance of the
original entry.  However, if you do not need to refer to the data in the latter
part of the field at all then the answer is even simpler - just define the based
fields as being smaller !!!

One word of warning - if there are multiple entries with the same value in the
part of the field you are comparing against, bsearch will not necessarily return
the first in the sequence as LOOKUP would on a similarly sorted array - it is up
to you to walk back through the array to find the first one if you need it.


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