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

Posted on 2008-10-28
Last Modified: 2012-05-05
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!
Question by:khristofe
LVL 36

Expert Comment

ID: 22821691
use listlen

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

<cfset ct = listlen(test)>

LVL 63

Expert Comment

ID: 22822343
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.

Expert Comment

ID: 22823221
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.
Master Your Team's Linux and Cloud Stack

Come see why top tech companies like Mailchimp and Media Temple use Linux Academy to build their employee training programs.


Author Comment

ID: 22825899
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 #">
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!


Accepted Solution

eszaq earned 500 total points
ID: 22843934
You can try query of queries:

<cfset MyList = "12,7,5,3,2,5,7,34,17,2,12,5,7,19,12,2,7,8">
<cfset RateThisImage = 1>
<h1>build query from list</h1>
<cfset CountedRatings=QueryNew("ImageID,RatingValue")>
<cfloop index="x" list="#MyList#" delimiters=",">
	<cfset temp = QueryAddRow(CountedRatings)>
	<cfset temp = QuerySetCell(CountedRatings, "ImageID", RateThisImage)>
	<cfset temp = QuerySetCell(CountedRatings, "RatingValue", #x#)>
<cfdump var="#CountedRatings#">
<h1>get rating count</h1>
<cfquery name="getTotals" dbtype="query">
	SELECT ImageID, RatingValue, count(*) as totals
	from CountedRatings
	where ImageID=#RateThisImage#
	group by ImageID, RatingValue
	order by totals desc
<cfdump var="#getTotals#">

Open in new window


Author Comment

ID: 22852234
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!!! ;)

Author Closing Comment

ID: 31510667
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!!!

Expert Comment

ID: 22852283

Featured Post

Ransomware-A Revenue Bonanza for Service Providers

Ransomware – malware that gets on your customers’ computers, encrypts their data, and extorts a hefty ransom for the decryption keys – is a surging new threat.  The purpose of this eBook is to educate the reader about ransomware attacks.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Query Syntax 17 34
Deal with apostrophe in stored procedures 8 42
optimize stored procedure 6 26
New to SSRS, extremely slow running report. 8 20
Load balancing is the method of dividing the total amount of work performed by one computer between two or more computers. Its aim is to get more work done in the same amount of time, ensuring that all the users get served faster.
For both online and offline retail, the cross-channel business is the most recent pattern in the B2C trade space.
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
Using examples as well as descriptions, and references to Books Online, show the documentation available for datatypes, explain the available data types and show how data can be passed into and out of variables.

773 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question