Node.js

Node.js stream uses the pipe function to connect the source to the destination

src.pipe(dst)

.pipe(dst) returns dst so that you can chain together multiple .pipe calls together:

a.pipe(b).pipe(c).pipe(d)

which is the same as:

a.pipe(b);
b.pipe(c);
c.pipe(d);

which is the same as with the shell command-line pipe:

a | b | c | d

Java

Java Stream (Map reduce implementation, only one source then)

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