fixed getitem adjust slice function errors

Author: shivasankarka

numojo/core/ndarray.mojo

@@ -484,7 +484,7 @@ struct NDArray[dtype: DType = DType.float64](
         var count: Int = 0
         var spec: List[Int] = List[Int]()
         for i in range(n_slices):
-            self._adjust_slice_(slice_list[i], self.ndshape[i])
+            # self._adjust_slice_(slice_list[i], self.ndshape[i])
             if (
                 slice_list[i].start.value() >= self.ndshape[i]
                 or slice_list[i].end.value() > self.ndshape[i]
@@ -611,43 +611,11 @@ struct NDArray[dtype: DType = DType.float64](
         Example:
             `arr[1:3, 2:4]` returns the corresponding sliced array (2 x 2).
         """
-        print("slices: ", slices[0], slices[1], slices[2])
         var n_slices: Int = len(slices)
         var ndims: Int = 0
         var count: Int = 0
         var spec: List[Int] = List[Int]()
-        var slice_list: List[Slice] = List[Slice]()
-        for i in range(n_slices):
-            var start: Int = 0
-            var end: Int = 0
-            if slices[i].start is None and slices[i].end is None:
-                start = 0
-                end = self.ndshape[i]
-                temp = Slice(
-                    start=Optional(start),
-                    end=Optional(end),
-                    step=Optional(slices[i].step),
-                )
-                slice_list.append(temp)
-            if slices[i].start is None and slices[i].end is not None:
-                start = 0
-                temp = Slice(
-                    start=Optional(start),
-                    end=Optional(slices[i].end.value()),
-                    step=Optional(slices[i].step),
-                )
-                slice_list.append(temp)
-            if slices[i].start is not None and slices[i].end is None:
-                end = self.ndshape[i]
-                temp = Slice(
-                    start=Optional(slices[i].start.value()),
-                    end=Optional(end),
-                    step=Optional(slices[i].step),
-                )
-                slice_list.append(temp)
-            if slices[i].start is not None and slices[i].end is not None:
-                slice_list.append(slices[i])
-
+        var slice_list: List[Slice] = self._adjust_slice_(slices)
         for i in range(n_slices):
             if (
                 slice_list[i].start.value() >= self.ndshape[i]
@@ -867,24 +835,48 @@ struct NDArray[dtype: DType = DType.float64](
         var idx: Int = _get_index(index, self.coefficient)
         return self.data.load[width=1](idx)
 
-    fn _adjust_slice_(self, inout span: Slice, dim: Int):
+    fn _adjust_slice_(self, slice_list: List[Slice]) raises -> List[Slice]:
         """
         Adjusts the slice values to lie within 0 and dim.
         """
-        if span.start or span.end:
-            var start = int(span.start.value())
-            var end = int(span.end.value())
-            if start < 0:
-                start = dim + start
-            if not span.end:
-                end = dim
-            elif end < 0:
-                end = dim + end
-            if end > dim:
-                end = dim
-            if end < start:
+        var n_slices: Int = slice_list.__len__()
+        var slices = List[Slice]()
+        for i in range(n_slices):
+            var start: Int = 0
+            var end: Int = 0
+            if slice_list[i].start is None and slice_list[i].end is None:
+                start = 0
+                end = self.ndshape[i]
+                temp = Slice(
+                    start=Optional(start),
+                    end=Optional(end),
+                    step=Optional(slice_list[i].step),
+                )
+                slices.append(temp)
+            if slice_list[i].start is None and slice_list[i].end is not None:
                 start = 0
-                end = 0
+                temp = Slice(
+                    start=Optional(start),
+                    end=Optional(slice_list[i].end.value()),
+                    step=Optional(slice_list[i].step),
+                )
+                slices.append(temp)
+            if slice_list[i].start is not None and slice_list[i].end is None:
+                end = self.ndshape[i]
+                temp = Slice(
+                    start=Optional(slice_list[i].start.value()),
+                    end=Optional(end),
+                    step=Optional(slice_list[i].step),
+                )
+                slices.append(temp)
+            if (
+                slice_list[i].start is not None
+                and slice_list[i].end is not None
+            ):
+                slices.append(slice_list[i])
+            else:
+                raise Error("Error: Undefined Slice")
+        return slices^
 
     fn __getitem__(self, owned *slices: Slice) raises -> Self:
         """
@@ -908,23 +900,24 @@ struct NDArray[dtype: DType = DType.float64](
         var narr: Self = self[slice_list]
         return narr
 
-    fn __getitem__(self, owned slices: List[Slice]) raises -> Self:
+    fn __getitem__(self, owned slice_list: List[Slice]) raises -> Self:
         """
         Retreive slices of an array from list of slices.
 
         Example:
             `arr[1:3, 2:4]` returns the corresponding sliced array (2 x 2).
         """
 
-        var n_slices: Int = slices.__len__()
+        var n_slices: Int = slice_list.__len__()
         if n_slices > self.ndim or n_slices < self.ndim:
             raise Error("Error: No of slices do not match shape")
 
         var ndims: Int = 0
         var spec: List[Int] = List[Int]()
         var count: Int = 0
+
+        var slices: List[Slice] = self._adjust_slice_(slice_list)
         for i in range(slices.__len__()):
-            self._adjust_slice_(slices[i], self.ndshape[i])
             if (
                 slices[i].start.value() >= self.ndshape[i]
                 or slices[i].end.value() > self.ndshape[i]