Fix Result.map when Array contains zero elements (#4036, #4048).

src.ts/abi/coders/abstract-coder.ts

@@ -211,6 +211,23 @@ export class Result extends Array<any> {
  return new Result(_guard, result, names);
  }
 
+ /**
+ * @_ignore
+ */
+ map<T extends any = any>(callback: (el: any, index: number, array: Result) => T, thisArg?: any): Array<T> {
+ const result: Array<T> = [ ];
+ for (let i = 0; i < this.length; i++) {
+ const item = this[i];
+ if (item instanceof Error) {
+ throwError(`index ${ i }`, item);
+ }
+
+ result.push(callback.call(thisArg, item, i, this));
+ }
+
+ return result;
+ }
+
 
  /**
  * Returns the value for %%name%%.