Updated truncate() to handle array of strings

docs/TransactionMapping.md

@@ -81,4 +81,4 @@ The syntax for mapping is based on object properties. The object to map from is
 |**map**|any[], string|`macro['map'](input['someArrayOfObjects'], 'someProperty')['val']`|Method for returning an array of a specific property in array of objects.|
 |**sum**|any[], string, [number=0]|`macro['sum'](input['someArrayOfObjects'], 'someProperty')['val']`|Method for returning the sum of an array of numbers, with an optional decimal places parameter.|
 |**random**|N/A|`macro['random']()['val']`|Method for returning a random 4 digit number.|
-|**truncate**|N/A|`macro['truncate']("testing", 4)['val']`|Method for truncating a string to the desired length.|
+|**truncate**|string \| string[], number|`macro['truncate']("testing", 4)['val']`|Method for truncating a string or array of strings to the desired character length.|

package.json

@@ -1,6 +1,6 @@
 {
     "name": "node-x12",
-    "version": "1.3.4",
+    "version": "1.3.5",
     "description": "ASC X12 parser, generator, query engine, and mapper; now with support for streams.",
     "main": "index.js",
     "keywords": [

src/X12TransactionMap.ts

@@ -191,9 +191,15 @@ export class X12TransactionMap {
           val: Math.floor(Math.random() * 10000)
         }
       },
-      truncate: function truncate (value: string, maxChars: number) {
+      truncate: function truncate (value: string|string[], maxChars: number) {
+        if (Array.isArray(value)) {
+          value = value.map((str) => str.substring(0, maxChars))
+        } else {
+          value = `${value}`.substring(0, maxChars)
+        }
+
         return {
-          val: `${value}`.substring(0, maxChars)
+          val: value
         }
       }
     }