Checking for Null in an Object

for ( var i=0; i<MyArrayObj.length; 开发者_StackOverflowi++ ) {

}

I am getting an error called, Cannot call MyArrayObj, since its is NULL

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Assuming there isn't a logical error with MyArrayObj being null:

if(MyArrayObj) {
    for ( var i=0; i<MyArrayObj.length; i++ ) {

    }
}

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You can also add this line above your loop just to be sure and avoid having to check at all:

MyArrayObj = MyArrayObj || [];

This will assign empty array into the variable in case it's null or undefined.

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Did you declare the MyArrayObj and assigned a correct value to it?

Could you provide the code where you assign the array to a value?

Otherwise check if the array is not null first.

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So that means you must not have initialized myArrayObj yet. You have to put something in the array before you can iterate through it.