through2-* demo

Another quick demo of through2-map and through2-filter.

Objective

• create a stream of monotonically increasing integers
• filter out the even integers
• show the differences between pairwise odd numbers in stream

Sample output

B - A = DELTA
1 - 0 = 1
5 - 1 = 4
5 - 5 = 0
7 - 5 = 2
9 - 7 = 2
11 - 9 = 2
13 - 11 = 2
13 - 13 = 0
15 - 13 = 2
17 - 15 = 2
21 - 17 = 4