how to compare values in an array if they are the same or not

[Amer Ramamni]

Hi All,

I need help in java script, I thought I should give this forum a shot.
I have an array that can contains the following examples:

Examples:
array = {"Yes", null, null, "Yes"} - return "Yes"
array = {"Yes", "Yes", "Yes", "Yes"} - return "Yes"
array = {"Yes", "No", "Yes", "Yes"} - return "Rej" because they don't match
array = {"No", "No", null, null} - return "No"
array = {null, null, null, null} - return null
array = {"No", "No", "No", "No"} - return "No"
array = {"Yes", "No", null, null} - return "Rej"

Anytime the array has a different value other than null, then the return has to be "Rej".

I have started working on this, however its not working for all cases. I do need help.

Here is my code:

       var count = 0;
       var arr_output = new Array();
var output1 = new Array();

       WorkArray = WorkArray.filter(function(val) {
	return !(val === "" || typeof val == "undefined" || val === null);});
	
	if (WorkArray.length > 1){
		for (j = 0; j < WorkArray.length; j++){
			for (k = j + 1; k < WorkArray.length; k++){
				if (WorkArray[j] != WorkArray[k]){
					arr_output.push("Rej");
					count = count + 1;
					break;
				}
			}
			if (count > 0) 
			   break;
		}
		if (count === 0){
			for (r = 0; r < WorkArray.length; r++){
			    arr_output.push(WorkArray[r]);
			    break;
			}
		}
	}
	else{
	   arr_output.push(WorkArray[0]);
	}
	output1 = arr_output;
	return output1;

Thanks in advance.

[Bear Bibeault]

Sorry, not really grokking what you are trying to accomplish.

[Amer Ramamni]

really .....
Anytime the array has a different value other than null, then the return has to be "Rej", otherwise its one of the values in the array.
Please look at my examples.

[Paul Clapham]

Let me take a wild guess at what those examples mean.

(1) Remove all the null entries from the array.

(1.5) If there aren't any more entries, return null.

(2) If all of the remaining entries are the same, return one of them.

(3) Otherwise, return "Rej".

[William P O'Sullivan]

Create a temporary Set.

Iterate through the Array, and add each Element to the Set (ignore nulls).

Since Sets don't allow duplicates, if the size is 1 then return the first(only) element, e.g: "Yes" or "No".
If the set is empty, size=0, return null
If the set size > 1 then return "Rej", since you would found a "Yes" and a "No".

WP

[Bear Bibeault]

JavaScript has no Set type.

[William P O'Sullivan]

OOPS!

Misread the OP.

My bad.. thumbs up anyway!

WP