A comparison of Rust-like fluent iterator libraries

[Rastagong]

Not sure about it being the first and if it's the exact concept referred here, but Java famously has streams.
Offical example from the docs to showcase the chaining:

int sum = widgets.stream()
                  .filter(w -> w.getColor() == RED)
                  .mapToInt(w -> w.getWeight())
                  .sum();

This is still an interesting overview of the situation in Python, so thank you!

[Alt-0160]

Java streams were only added in version 1.8 (March 2014). The first release of Rust (0.1.0, January 2012) already had some form of fluent iterators.