UseCollectNested.md

Pattern: Use of nested collect()

Issue: -

Description

Instead of nested collect calls use collectNested.

Example of violations:

def list = [1, 2, [3, 4, 5, 6], [7]]

println list.collect { elem ->
if (elem instanceof List)
    elem.collect {it *2} // violation
else elem * 2
}

println list.collect([8]) {
if (it instanceof List)
    it.collect {it *2} // violation
else it * 2
}

println list.collectNested { it * 2 } // same functionality, better readability

Further Reading

• CodeNarc - UseCollectNested