The Node CSV modules are really examples of how to write documentation that makes it much more difficult to to understand an API.
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The use of test cases as "API documentation" that doesn't show how to use the module for common bog-standard use cases, and instead brings in other unrelated CSV modules to conflate the example is particularly *chef kiss*
Why demonstrate the CSV parser parsing a string literal or filesystem stream when you can generate the CSV using your fancy (otherwise useless) CSV generator and hook it up in a way that's incompatible for the common use case?