Coffeescript/Javascript loop not executing

Question

I have a simple coffeescript to process a specific selector (part_ids) ..

 alert "Starting  blines  " + $("[id*=part_id]").length
 for bl in $("[id*=part_id]")
   do(bl) ->
     procBl bl

  procBl  = (bl)  ->
     alert "# of children "  + bl.children().length

First alert show 2 items are on the page. For loop runs -- however the procBl doesn't print the alert (it quietly exits) It appears that bl that's being iterated and passed to the function is not the correct object and I can't figure out what's it and wrong with this code -

any help is appreciated

dfsq · Accepted Answer · 2014-12-28 14:13:13Z

1

bl passed into procBl function is not a jQuery instance, but plain DOM element. Wrap it with $() to use children method:

  procBl  = (bl)  ->
     alert "# of children "  + $(bl).children().length

... or use $.fn.each method to iterate over $("[id*=part_id]") collection.

answered Dec 28, 2014 at 14:13

dfsq

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3 Comments

sms Over a year ago

dfsq -- wrapping with $ works in the for loop but doesn't work in the function -- it exits quietly -- could you show me the syntax for using the .each -- on the collection .. thanks .. the

dfsq Over a year ago

$("[id*=part_id]").each -> alert "# of children " + $(this).children().length;

sms Over a year ago

Thanks .. as I said it works in the for loop .. but I still can't call the function with bl or $(bl) :-(

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