Multiple category matching fail on multicategorized tasks

Question

1.00/5 (1 vote)

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Task and category defined in my system
+ category defined: cat1, cat2, cat3
+ existing tasks:
- task1 (categorized: cat1, cat2, cat3)
- task2 (categorized: cat1, cat2)
- task3 (categorized: cat1, cat3)
- task4 (categorized: cat1)

The required answer:
Required filtering:
task categorization is a set containing cat1 AND cat2
Expected answer:
-task1
-task2

ToDoList real answers:
Case1
+ Filtering fields status:
- CATEGORY: checked cat1 AND cat2
- OPTIONS: none
+ Answer:
- task2

Case2
+ Filtering fields status:
- CATEGORY: checked cat1 and cat2
- OPTIONS: Any category can match
+ Answer:
- task1
- task2
- task3
- task4

Is it possible to obtain the required answer?

Posted 2-Mar-11 2:35am

KalimeroBlues

Updated 2-Mar-11 2:43am

Henry Minute

v2

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Comments

Henry Minute 2-Mar-11 8:47am

What sort of system?

A database? If so which one.
Which language? Do you have a preference?

Your tag of 'questions' is useless, it gives no indication as to the content of your question.

Also bolding everything does not make your question any clearer, it just makes it more difficult to read. It is the equivalent of of shouting.

Sandeep Mewara 2-Mar-11 9:03am

Just looks like some homework question that too a little incomplete! :doh:

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Piccadilly Yum Yum · Answer 1 · 2011-03-02T03:51:00

In php :

$task1["cat1"] = 1
$task1["cat2"] = 1
$task1["cat3"] = 1

$task2["cat1"] = 1
$task2["cat2"] = 1

$task3["cat1"] = 1
$task3["cat3"] = 1

$task4["cat1"] = 1

// Case 1 :
if (isset($task1["cat1"]) && isset($task1["cat2"] && !isset($task1["cat3"])
    echo "task1 does match !"

if (isset($task2["cat1"]) && isset($task2["cat2"] && !isset($task2["cat3"])
    echo "task2 does match !";

and so on ...