added option to append CSV headers

libs/storage/_locales/storage-jsdoc-strings.json

@@ -2,8 +2,11 @@
   "storage.Storage.append": "Append string data to a new or existing file.",
   "storage.Storage.appendBuffer": "Append a buffer to a new or existing file.",
   "storage.Storage.appendCSV": "Append a row of CSV data",
+  "storage.Storage.appendCSVHeaders": "Append a row of CSV headers",
+  "storage.Storage.appendCSVHeaders|param|filename": "the file name to append data, eg: \"data.csv\"",
+  "storage.Storage.appendCSVHeaders|param|headers": "the data to append",
   "storage.Storage.appendCSV|param|data": "the data to append",
-  "storage.Storage.appendCSV|param|filename": "the file name to append data, eg: \"data.txt\"",
+  "storage.Storage.appendCSV|param|filename": "the file name to append data, eg: \"data.csv\"",
   "storage.Storage.appendLine": "Appends a new line of data in the file",
   "storage.Storage.appendLine|param|data": "the data to append",
   "storage.Storage.appendLine|param|filename": "the file name to append data, eg: \"data.txt\"",

libs/storage/_locales/storage-strings.json

@@ -1,4 +1,5 @@
 {
+  "storage.Storage.appendCSVHeaders|block": "storage %source|%filename|append CSV headers %headers",
   "storage.Storage.appendCSV|block": "storage %source|%filename|append CSV %data",
   "storage.Storage.appendLine|block": "storage %source|%filename|append line %data",
   "storage.Storage.append|block": "storage %source|%filename|append %data",

libs/storage/storage-core.ts

@@ -61,8 +61,24 @@ namespace storage {
         }
 
         /**
+         * Append a row of CSV headers
+         * @param filename the file name to append data, eg: "data.csv"
+         * @param headers the data to append
+         */
+        //% blockId=storageAppendCSVHeaders block="storage %source|%filename|append CSV headers %headers"
+        appendCSVHeaders(filename: string, headers: string[]) {
+            let s = ""
+            for (const d of headers) {
+                if (s) s += "\t"
+                s = s + d;
+            }
+            s += "\r\n"
+            this.append(filename, s)
+        }
+
+                /**
          * Append a row of CSV data
-         * @param filename the file name to append data, eg: "data.txt"
+         * @param filename the file name to append data, eg: "data.csv"
          * @param data the data to append
          */
         //% blockId=storageAppendCSV block="storage %source|%filename|append CSV %data"