Triggers: Difference between revisions

var entries = lib().entries();                     // Get the current library and an array of its entries

if (entries.length > 0) {                           // Check that the array is not empty; otherwise exit,

                                                    // since there is no previous entry.

prevMileage = entries[0].field("Mileage");         // The array is sorted from newest to oldest,

                                                    // so the newest entry already in the array

                                                    // will be on top with index of 0.

entryDefault().set("StartMileage" , prevMileage )   // Set the value of the field Mileage from the previous entry

                                                    // as the default value for the field StartMileage.