Category "method-chaining"

Vertx v4.2.5 returns null instead of future from someFuture.onSuccess()

I'm trying to work through with vertx 4.2.5 promises and futures, but I keep getting tripped up on odd things I have a very simple groovy script like this, wher

How to transform columns with method chaining?

What's the most fluent (or easy to read) method chaining solution for transforming columns in Pandas? (“method chaining” or “fluent” is

Pandas Method chaining: reassigning a column using df.assign()

I have a dataframe with stock returns in one column, strategy values in another & and another column called trades with boolean values (True, False). My de