fix(parser): RangeError (#271)

Author: juanjoDiaz

lib/JSON2CSVBase.js

@@ -62,6 +62,7 @@ class JSON2CSVBase {
     const processedRow = (this.opts.unwind && this.opts.unwind.length)
       ? this.unwindData(row, this.opts.unwind)
       : [row];
+
     if (this.opts.flatten) {
       return processedRow.map(this.flatten);
     }
@@ -231,32 +232,30 @@ class JSON2CSVBase {
    * @returns {Array} Array of objects containing all rows after unwind of chosen paths
    */
   unwindData(dataRow, unwindPaths) {
-    return Array.prototype.concat.apply([],
-      unwindPaths.reduce((data, unwindPath) =>
-        Array.prototype.concat.apply([],
-          data.map((dataEl) => {
-            const unwindArray = lodashGet(dataEl, unwindPath);
-
-            if (!Array.isArray(unwindArray)) {
-              return dataEl;
-            }
-
-            if (unwindArray.length) {
-              return unwindArray.map((unwindEl) => {
-                const dataCopy = lodashCloneDeep(dataEl);
-                lodashSet(dataCopy, unwindPath, unwindEl);
-                return dataCopy;
-              });
-            }
-
-            const dataCopy = lodashCloneDeep(dataEl);
-            lodashSet(dataCopy, unwindPath, undefined);
-            return dataCopy;
-          })
-        ),
-        [dataRow]
-      )
+    return unwindPaths
+      .reduce((data, unwindPath) =>
+        data.map((dataEl) => {
+          const unwindArray = lodashGet(dataEl, unwindPath);
+
+          if (!Array.isArray(unwindArray)) {
+            return dataEl;
+          }
+
+          if (unwindArray.length) {
+            return unwindArray.map((unwindEl) => {
+              const dataCopy = lodashCloneDeep(dataEl);
+              lodashSet(dataCopy, unwindPath, unwindEl);
+              return dataCopy;
+            });
+          }
+
+          const dataCopy = lodashCloneDeep(dataEl);
+          lodashSet(dataCopy, unwindPath, undefined);
+          return dataCopy;
+        }).reduce((tempData, rows) => tempData.concat(rows), []),
+      [dataRow]
     )
+    .reduce((tempData, rows) => tempData.concat(rows), []);
   }
 }
 

lib/JSON2CSVParser.js

@@ -13,9 +13,10 @@ class JSON2CSVParser extends JSON2CSVBase {
     const processedData = this.preprocessData(data);
 
     if (!this.opts.fields) {
-      const dataFields = Array.prototype.concat.apply([],
-        processedData.map(item => Object.keys(item))
-      );
+      const dataFields = processedData
+        .map(item => Object.keys(item))
+        .reduce((tempData, rows) => tempData.concat(rows), []);
+
       this.opts.fields = dataFields
         .filter((field, pos, arr) => arr.indexOf(field) == pos);
     }
@@ -43,9 +44,9 @@ class JSON2CSVParser extends JSON2CSVBase {
       throw new Error('Data should not be empty or the "fields" option should be included');
     }
 
-    return Array.prototype.concat.apply([],
-      processedData.map(row => this.preprocessRow(row))
-    );
+    return processedData
+      .map(row => this.preprocessRow(row))
+      .reduce((tempData, rows) => tempData.concat(rows), []);
   }
 
   /**