Design Patterns · Middle · Question 71 of 75

What is a collection pipeline?

orders.filter(isPaid).map(toTotal).reduce(sum, 0)

✓Correct answer: Processing data as a chain of small transformations, each producing input for the next
2A CI pipeline for collections
3A database replication setup

Explanation

Each step is easy to name and test. For huge data, lazy iterators avoid creating intermediate arrays.

Further reading

Martin Fowler: Collection Pipeline ↗

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