Chapter 07 · applied · runs in browser
Composing expressions
Connect transformations, filters, intermediate results, and conditions into a readable data flow.
01Chained transformationsCreate helper maps, filter them, and transform the result into the required shape.Try CEL02Filter, map, and membershipExclude values that are already registered and turn the remaining objects into a simple list.Try CEL03Prioritized decisionsWrite ordered rules so that the first matching branch determines the result.Try CEL04Intermediate state and safe selectionCarry a computed result through a one-item list and guard access to index 0.Try CEL