batman questions

• What is `_router` in express?
• How to render links as elbow connectors in d3 force directed graph
• How to produce X mark in html.
• Why are generics said to be invariant when "? extends Klass" is allowed?
• Generics type parameters getting bounded, without passing real type
• Failed to execute 'insertBefore' on 'Node': The node before which the new node is to be inserted is not a child of this node
• How to unit test a function, which just calls other functions?
• What are the different ways of writing an IIFE? What are their use cases?
• How does the getClass() is implemented in java?
• When does the binary operators execution happen in Java?

batman answers