Smell Loops

Loops have been a core programming construct since the earliest languages but are showing their age. First-class functions are now widely supported, and we can use pipeline operations like filter, map, and reduce to better express what we want. Pipeline operations help us quickly see the elements that are included in the processing and what is done with them, whereas loops often bury this information.

• Loops have been a core programming construct since the earliest languages but are showing their age. First-class functions are now widely supported, and we can use pipeline operations like filter, map, and reduce to better express what we want. Pipeline operations help us quickly see the elements that are included in the processing and what is done with them, whereas loops often bury this information.

Martin Fowler — Refactoring: Improving the Design of Existing Code, 2nd