How to use "WHOSE" concept in Javascript

Question

Hi Scripters,
I have one question about the difference in between Applescript & Javascript?
My question is about this "WHOSE" concept in Javascript when compared as of to Applescript usage which made it very simple.
The below mentioned Applescript code will select the entire page items in page 1 of document 1 whoever omiting those items whose geometric bounds are less than 0.
tell application "Adobe InDesign CS4"
     set selection to (every page item of page 1 of document 1 whose (item 1 of geometric bounds is not less than 0))
end tell
Here in this above mentioned code I have used "WHOSE" concept to omit some specific page items, however using javascript it is not possible to use this WHOSE concept to simply the Javscript code.
thanks

Answer 1

Unfortunately lack of a nice filtering syntax is indeed one of the many flaws of the JavaScript language.
Generally speaking we just write this in an ugly way with a for loop:
var i, p, page=app.document[0].pages[0], s=[];
for (i=0; i<page.pageitems.length; i++) {
  p = page.pageitems[i];
  if (!(p.geometricBounds[1] < 0)) {
    s.push(p);
app.select(s);
Some people like to use Marc Autret's whose and findItems functions though: see http://forums.adobe.com/message/3070983#3070983.