Coldfusion Struct, when copied:
<cfset new1 = StructNew() />
<cfset new2 = StructNew() />
<cfset new1 = new2 />
Is just a pointer in the system (documented too). It does not have any
data that is by its own, so when you update new2, new1 will be updated.
To avoid this, use StructCopy().
On 1/7/2014 12:25 PM, Alan Holden wrote:
I'm glad that worked for you.
Virtually every CFML engine I've used has given me random issues like
this one : object elements persisting inside loops.
I've come to explicitly cast the "index" element of (whatever complex
thing I'm looping through) into its own variable right at the top of
any loop, by habit now.
Al
On 1/6/2014 10:38 PM, Magnus wrote:
Well, the docs are pretty clear that you can create a struct
implicitly by using struct dot notation... Ah but perhaps I need to
be explicit about it being a new struct each time. Wait... let's try
this.
Ok. that is it. Now it works. I just added "<cfset
fileInfo=strcutNew()>" just inside the loop and it works as expected.
I wasearlier looking at a similar example I did a while back but
couldn't see the difference (assuming implicit creation was the same
as explicit) but in that case I used the full formal syntax for
declaring and creating structs including declaring a new struct.
So an easy fix. Thanks.
On Monday, 6 January 2014 20:45:57 UTC-8, Al Holden wrote:
oops. As a new struct, not a new array.
On 1/6/2014 8:24 PM, Alan Holden wrote:
Where is fileInfo declared as a new array?
Shouldn't that be the first step inside your loop?
Just curious.
Al
P.S. Just for debugging fun, add i as an array element too.
On 1/6/2014 7:48 PM, Magnus wrote:
I am trying to create an array of structs from values passed
from a form. Using this code, the resulting array has the same
value in each array cell from last iteration of the loop. The
desired result, of course, is toi hae each pair of form values
passed to a struct in each array cell. As far as I can tell, it
seems the earsh array cell is only a reference to the fileInfo
struct which gets rewritten each loop. I can't recall where I
have read about assigning vallues and referencing variables in
CFML to help me clarify wht is going on and how to get it
working as I want. (If you are wondering, the form is from
Plupload for uploading files.
I want ot put the valuesinto an array because I will be doing a
bunch of operations to or on the files and looping over and
array each time will be simplier can repeatedly dealing with
the dynamically generated form variables. Any help getting on
track and beter understanding what is goingon here is much
appeciated.
Magnus
<cfdump var="#FORM#"> ...the starting values...
struct
FIELDNAMES
UPLOADER_0_NAME,UPLOADER_0_STATUS,UPLOADER_1_NAME,UPLOADER_1_STATUS,UPLOADER_2_NAME,UPLOADER_2_STATUS,UPLOADER_3_NAME,UPLOADER_3_STATUS,UPLOADER_4_NAME,UPLOADER_4_STATUS,UPLOADER_COUNT
UPLOADER_0_NAME ANGELS.wav
UPLOADER_0_STATUS done
UPLOADER_1_NAME Kalimba.mp3
UPLOADER_1_STATUS
done
UPLOADER_2_NAME Machine_Gun_Alley_1.ogg
UPLOADER_2_STATUS
done
UPLOADER_3_NAME Maid with the Flaxen Hair.mp3
UPLOADER_3_STATUS done
UPLOADER_4_NAME Sleep Away.mp3
UPLOADER_4_STATUS
done
UPLOADER_COUNT 5
Here is the code..
<cfset fileArray = arrayNew(1)>
<cfloop index="i" from="0" to="#FORM.uploader_count-1#" step="1">
<cfset fileInfo.name=#Evaluate("FORM.uploader_" & i &
"_name")#>
<cfset fileInfo.status=#Evaluate("FORM.uploader_" & i &
"_status")#>
<cfset fileArray[i+1] = fileInfo>
<cfdump var="#fileInfo#"
</cfloop>
<cfdump var="#fileArray#"> ...the end result...
array
1
struct
name Sleep Away.mp3
status done
2
struct
name Sleep Away.mp3
status
done
3
struct
name Sleep Away.mp3
status done
4
struct
name Sleep Away.mp3
status done
5
struct
name Sleep Away.mp3
status done
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