CODEWITHSUNDEEP
groovy
Delmon Young
Delmon Young

Reputation: 2053

Collection using join method on empty values

I've got a simple method that looks at the request parameters coming through from a form and displays the values in a string. This method is working just fine but when an empty value comes through from the form it shows something like this:

beef:mozzarella::milk

You can see that there's an extra ":" if the value was empty how do I remove that? For some reason checking if v.size > 0 isn't working. Any ideas?

final String[] products = ["meat", "cheese", "nuts", "dairy"]

String generateProducts() {
        return request.requestParameterMap.findAll { k, v -> products.contains(k) }
         .collect { k, v -> v.size() > 0 ? v[0] : ""
        }.join(":")
    }

Upvotes: 2

Views: 866

Answers (2)

dmahapatro
dmahapatro

Reputation: 50265

Another way to handle this would be:

products.collect { request.requestParameterMap[it] }.findAll().join(':')

Thanks to Tim Yates for the tap on my wrist to make me realize that I was becoming too generic about beef, mozzarella and milk when thinking of meat, cheese and dairy. ;-) (See comments on Tim's answer to notice my blatant ignorance)

Upvotes: 3

tim_yates
tim_yates

Reputation: 171144

You could make use of subMap:

request.requestParameterMap
       .subMap(products)
       .findResults { k, v -> v ?: null }
       .join(':')

Upvotes: 3

Related Questions