Chapter 05 · applied · runs in browser
Collection macros
Evaluate list items without manually repeating the same condition.
01The all() and exists() macrosTest a condition for every item and find at least one match.Try CEL02The exists_one() macroVerify that exactly one list item satisfies a condition.Try CEL03The filter() macroCreate a new list containing only items that satisfy a condition.Try CEL04The map() macroTransform every input-list item into a new value.Try CEL