-.js

# rx

[ivano]

-.js

-.js

[tseisel]

1. Given the words "Alpha", "Beta", "Gamma", "Delta", "Epsilon" as source...
2. Group them by length
3. For each group of elements of the same length,
3a. Join all values to a String, separated by ,
3b. Format each group to a string: "key: value1, value2"
4. Print each group.

This will likely print the following:

5: Alpha, Gamma, Delta
4: Beta
7: Epsilon

reduce is the step 3a.

[ivano]

thank you very much