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khristofe

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I would like to count occurencies of elements in a coldfusion 8 array.

I'm using a form with chexboxes to feed a SQL database, the cells are feed with a string of numbers (12,34,4, 6, 12, 34, 7).
Those numbers are ratingIDs of an imageID wich is part of a gallery.
A set of imageIDs rated define the ratingIDs of a movie.
To do so, i need to concatenate and count all the strings of numbers for the gallery set (all images for a given movie)
And use occurrence of numbers to sort desc and keep the 5 highgest occurence of the ratingID.

I reached to put all the strings in an array (1), but i can't find out how to count the elements of the array and output a result.

Thanks for helping!
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SidFishes
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use listlen

<cfset test = "12,34,4, 6, 12, 34, 7">

<cfset ct = listlen(test)>

<cfoutput>#ct#</cfoutput>
What are the Cell names for this values: 12,34,4, 6, 12, 34, 7
Give a complete example of cell names and form element names.
Not very clear question. What are you trying to do?
Count the elements of the array?  There is a function ArrayLen().
Or sum up values of your checked boxes? There is a function ArraySum(array)

But you might be able to get same results with list functions without using arrays. To help with solution, need more info from you - form-fields names, etc, Provide your code snippet.
Avatar of khristofe
khristofe

ASKER

This is what i have:
1 - a list of checkboxes corresponding to a list a ratings to rate an Image.
2 - I rate each image of a film gallery with a set of ratings.
3 - I upload to SQL DB table ratingsPerImage
 
table structure:
FeImRatIDs (PK)    ImageID(FK Gallery)   RatingIDs(FK Ratings)
1                             1                                12,7,5,3,2
2                             2                                5,7,34,17
3                             3                                2,12,5,7,19
4                             4                                12,2,7,8

I make a query to group the ImageIDs for a given FilmID, so it returns an array with all my ratingIDs for the set of ImageIDs of the film gallery-
1 12
2 7
3 5
4 3
5 2
6 5
7 7
8 34
9 17
10 2
11 12
12 5
13 7
14 19
15 12
16 2
17 7
18 8

then i would like to sort ratingIDs by occurrence, list len only tell me the number of elements in my list or array.
listCount inside a list loop could give me a list of occurencies like :
As MyList = (12,7,5,3,2,5,7,34,17,2,12,5,7,19,12,2,7,8)

<cfloop list="#myList#" index="x" delimiters=",">
<cfset countedRatingIDs = ListValueCount(#myNewList#, #x#, ',')>
<cfdump var="#countedRatingIDs #">
</cfloop>
the dump returns: 3 4 3 1 2 1 1 1 1
meaning that 12 has 2 occurrencies, 7 has 4, 5 has 3 etc.
but, how to sort the 5 first ratingIDs like if 7 has 4 occurrencies, then first is 7, 5, 12,2,3,17,19,8?
I was thinking about a script inside the loop, but i'm beginner and don't manage javascript at all, or at the query level using a function into SQL server to sort the concatenated list of ratingIDs per FilmID...
Thanks for helping!

ASKER CERTIFIED SOLUTION
Avatar of eszaq
eszaq
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As beginner i didn't knew that we could build a query from a list, that was exactly what i was looking for, so thatnks a lot eszaq!!! ;)
Perfect! I was stuck trying to work it from the arrays, i reach to have 2 arrays, one with the ratingIDs and another one with the occurrences... but your solution was just perfect! Thanks again!!!
Christophe.
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