Re: Predicate and beginswith
Re: Predicate and beginswith
- Subject: Re: Predicate and beginswith
- From: Brian Amerige <email@hidden>
- Date: Tue, 22 May 2007 10:21:17 -0400
Yep -- that's correct. My stringToComplete (the argument string)
wasn't what I expected.
To give some context, this was being done in NSTextView's delegate
method, textView:completions:forPartialWordRange:indexOfSelectedItem,
where I was using the partialWordRange to substring the textview's
textstorage's string. Typically this would be fine, but the
partialWordRange does not include non alphanumeric characters --- so
when the argument was really "<htm" , the substring was only "htm",
which as you may guess, will return nothing under a "beginswith" query.
Thanks for the pointer to check :-)
-Brian.
On May 22, 2007, at 10:02 AM, Shawn Erickson wrote:
On May 21, 2007, at 9:43 PM, Joel Levin wrote:
Hi Brian,
The following code works perfectly as expected:
NSString* arg = @"<htm";
NSMutableArray* array = [NSMutableArray array];
[array addObject:@"<html>"];
[array addObject:@"<form>"];
NSPredicate* predicate = [NSPredicate predicateWithFormat:@"SELF
beginswith[cd] %@", arg];
NSArray* filtered = [array filteredArrayUsingPredicate:predicate];
NSLog(@"%@", array);
NSLog(@"filtered by: %@", arg);
NSLog(@"%@", filtered);
The only difference here is that in your code you are setting
allKeys back to the result of running a method on allKeys with
this line:
allKeys = [allKeys
filteredArrayUsingPredicate:stringToCompletePredicate];
Try created a new array to hold the filtered array see if it makes
any difference (I'm not sure why this would be a problem, but it's
literally the only difference, so it's worth a try).
He is creating a new array. The allKeys lvar is storage for a
pointer and it doesn't care what it points at.
To me is sounds like his [coloringEngine allKeys] is returning an
array with something other then he expects or stringToComplete is
nil or something other then he expects.
Brian use the debugger to understand what is going on. You can ask
it to print out the description of each object to ensure it is as
you expect.
-Shawn
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