Question

This Boolean comparison always returns false but it is comparing false == false in my getColumnsFunction(). It should return true, and I have no clue why. Here is the code:

function getModelColumns(exlude, modelName){    
    var model = Ext.ModelManager.getModel(modelName).create();
    var fields = model.fields.items;

    for(var x in fields){
        console.log( inArray(exlude, fields[x].name == false),
                    'boolean_compare', 
                     inArray(exlude, fields[x].name));
     }

}
function inArray(arr,val){
    for(var x in arr){
        if(arr[x] === val)
            return true;
    }

    return false;
 }

Here is what is in console.log() for all fields in that for loop:

false "boolean_compare" false 

They are both equal to false, why they heck does that boolean comparison return false?

Edit: forgot a ‘(‘ it should be inArray(exlude, fields[x].name ) == false

Answer 1

This expression:

inArray(exlude, fields[x].name == false)

will first compare the name to false, and as they are not equal it will call inArray(exclude, false). Unless it’s an array containing the value false it will always return false.

I think that you want:

inArray(exlude, fields[x].name) == false

which will search for the name in the array, then compare the result to false.