Contracts for Java enables you to write annotate your code with contracts in the form of preconditions, postconditions and invariants.
These contract annotations are
easy to write and read,
and checked at runtime.
Annotating code with contracts helps you:
Too much time is spent manipulating data just to get analysis and visualization tools to read it. Wrangler is designed to accelerate this process: spend less time fighting with your data and more time learning from it.
"First, when the data and API models fit…..Second, it’s necessary to consider the performance/cost curve of a particular workload on a distributed filesystem vs. that on some other type of system." — good generic design advice beyond filesystems.