Like most programmers, I was taught to use loops to iterate over a collection of objects. Increasingly, however, language environments provide a better construct: the collection pipeline. Collection Pipelines [mf-cp] allow me to describe my processing as a series of operations, each consuming and emitting a collection. The most common of these operations are map, which uses a function to transform each element of the input collection, and filter which uses a function to select a subset of the input collection for later steps in the pipeline. I find logic much easier to follow if it is
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