updated methods and docs

Author: Phelsong

README.md

@@ -15,8 +15,8 @@ from pathlib import Path
 fn main():
     var csv_path = Path("path/to/csv/file.csv")
     var reader = CsvReader(csv_path)
-    for i in range(len(reader.elements)):
-        print(reader.elements[i])
+    for i in range(len(reader)):
+        print(reader[i])
 ```
 
 ##### Optional Usage
@@ -28,8 +28,8 @@ from pathlib import Path
 fn main():
     var csv_path = Path("path/to/csv/file.csv")
     var reader = CsvReader(csv_path, delimiter="|", quotation_mark='*')
-    for i in range(len(reader.elements):
-        print(reader.elements[i])
+    for i in range(len(reader)):
+        print(reader[i])
 ```
 
 ### Attributes
@@ -46,3 +46,8 @@ reader.length : Int # total number of elements
 
 ##### Indexing
 
+currently the array is only 1D, so indexing is fairly manual.
+
+```Mojo
+reader[0] # first element
+```

src/csv_reader.mojo

@@ -5,6 +5,7 @@ from testing import assert_true
 
 # https://www.rfc-editor.org/rfc/rfc4180
 #
+@value
 struct CsvReader:
     # var data: Dict[String,String]
     var headers: List[String]
@@ -120,6 +121,13 @@ struct CsvReader:
             raise Error("Index out of range")
         return self.elements[index]
 
+
+    fn __len__(self) -> Int:
+        return self.length
+
+    # fn __iter__(self) -> Iterator[String]:
+    #     return self.elements.__iter__()
+
     # fn __repr__(self) -> String:
     #     var out = String("[")
     #     for el in self.elements:

test.mojo

@@ -24,7 +24,7 @@ fn main() raises:
     print("----------")
     try:
         assert_true(rd.col_count == 3)
-        for x in range(len(rd.elements)):
+        for x in range(len(rd)):
             print(rd.elements[x])
             assert_true(
                 rd.elements[x] == VALID[x],
@@ -33,27 +33,13 @@ fn main() raises:
                 ),
             )
         print("----------")
-        # print(rd)
         print("columns:", rd.col_count, "of 3")
         print("rows:", rd.row_count, "of 3")
         assert_true(rd.row_count == 3)
-        print("elements:", rd.length, "of 9")
+        print("elements:", rd.__len__(), "of 9")
         assert_true(len(rd.elements) == 9)
     except AssertionError:
         print(AssertionError)
         raise AssertionError
     print("----------")
     print("parse successful")
-
-
-# columns: 3
-# ----------
-# item1
-# item2
-# "ite,em3"
-# pic
-#  pi c
-# pic
-# r_i_1
-# r_i_2
-# r_i_3

test_pack.mojo

@@ -25,7 +25,7 @@ fn main() raises:
     print("----------")
     try:
         assert_true(rd.col_count == 3)
-        for x in range(len(rd.elements)):
+        for x in range(len(rd)):
             print(rd.elements[x])
             assert_true(
                 rd.elements[x] == VALID[x],
@@ -37,7 +37,7 @@ fn main() raises:
         print("columns:", rd.col_count, "of 3")
         print("rows:", rd.row_count, "of 3")
         assert_true(rd.row_count == 3)
-        print("elements:", rd.length, "of 9")
+        print("elements:", rd.__len__(), "of 9")
         assert_true(len(rd.elements) == 9)
     except AssertionError:
         print(AssertionError)