Arnaud, Thanks for adding to my understanding of these functions. I rarely use the 0 element of an array, although I do use it in drowdown menus to display a menu name. But it is good to know that these functions ignore the 0 element by default. I have assumed that Find in array uses the 3rd parameter to speed up the search, especially with large arrays. Cheers, Alan
On Sun, Aug 21, 2016 at 9:23 AM, Arnaud de Montard <[email protected]> wrote: > > > Le 20 août 2016 à 21:57, Alan Tilson <[email protected]> a écrit : > > > > Hello again Alan, > > Removing the third parameter seems to fix things! > > Thanks for catching that one. I must have carried it over from Find in > > Array, which does have an optional 3rd parameter. > > It's useful when you use the 0 index of the array: > > +++ > ARRAY LONGINT($_al;0) > $_al{0}:=1 > $nbRows_l:=3 > For ($i_l;1;$nbRows_l) > APPEND TO ARRAY($_al;$i_l%2) > End for > > ASSERT(Find in array($_al;1)=1) > ASSERT(Find in array($_al;0)=2) > ASSERT(Find in array($_al;1;0)=0) //starting from 0 is allowed > > ASSERT(Count in array($_al;1)=2) //0 not considered > +++ > > From the last line of the code above, the 0 index is not considered by the > 'Count in array' function. > Displaying 'Count in array($_al;1;Random)' in debugger shows the > undocumented 3rd parameter must be avoided. > > -- > Arnaud de Montard > > > ********************************************************************** > 4D Internet Users Group (4D iNUG) > FAQ: http://lists.4d.com/faqnug.html > Archive: http://lists.4d.com/archives.html > Options: http://lists.4d.com/mailman/options/4d_tech > Unsub: mailto:[email protected] > ********************************************************************** > ********************************************************************** 4D Internet Users Group (4D iNUG) FAQ: http://lists.4d.com/faqnug.html Archive: http://lists.4d.com/archives.html Options: http://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] **********************************************************************
