Question: I was wondering, is it possible to have for instance a jenkins multijob that contains a "job" select input parameter ?

I want to create a multijob that : 

1 - run a job A

2 - run the selected job (for instance "Hello\_world")

3 - run job B

Answer: 
Finally i got this right, The way might be some what different but it work for me !!!

Here is the code for the same.

```
AttributeUpdates: {
                     Address2: 
                     {
                        Action: "DELETE"
                     },
                  }

```

And then i am adding the value on the condition.

```
if (propertyObj.address2) {
        params.AttributeUpdates.address2 = {
            Value: {
                S: propertyObj.address2
            },
            Action: "PUT"
        }
    }

```

Thank you to all from bottom of my heart :)who tried to help me, Cheers !!!
You can use [AttributeValue null](http://docs.aws.amazon.com/amazondynamodb/latest/APIReference/API_AttributeValue.html) type as a placeholder. If you cannot change the type, then, choose a sentinel value, like "ZZZZZ" or similar and make that represent the empty string. Alternatively, your model could just have one address field, and then, you could encode both address lines in address1, if the second address line is null/empty.