doc: Add ops

book/src/SUMMARY.md

@@ -23,6 +23,7 @@
 # Minor Libraries
 
 - [convert](./libs/convert/convert.md)
+- [ops](./libs/ops/ops.md)
 - [panic](./libs/panic/panic.md)
 
 # Miscellaneous

book/src/libs/array/array.md

@@ -5,27 +5,10 @@
 var array = Arr(null, 10);
 array = Arr.constant(const [1,2,3,4,5]);
 array = Arr.generate(10, (i) => i);
+array = Arr.range(0, 10, step: 2);
 for(final entry in array){
     // do something
 }
 var (slice1, slice2) = array.splitSlice(3);
 ```
-`Arr`'s allocation will be more efficient than compared to a `List` since it does not reserve additional capacity and allocates the full amount eagerly. Which is important since allocations account for most of the cost of the runtime costs of a List.
-
-## Range
-
-`range` is a convenience function for an iterator over the range `[start..end)`, where `start >= end` or `start <= end`.
-```dart
-for(final x in range(0, 10).stepBy(2)){
-    // code
-}
-// or equivalent
-for(final x in (0, 10).stepBy(2)){
-    // code
-}
-```
-
-`rangeArr` also exists as a more efficient method for when it is known collecting the range is needed.
-```dart
-Arr<int> x = rangeArr(0, 10, step: 2);
-```
+`Arr`'s allocation will be more efficient than compared to a `List` since it does not reserve additional capacity and allocates the full amount eagerly. Which is important since allocations account for most of the cost of the runtime costs of a List.

book/src/libs/ops/ops.md

@@ -0,0 +1,15 @@
+# Ops
+
+## Range
+
+`range` is a convenience function for an iterator over the range `[start..end)`, where `start >= end` or `start <= end`.
+```dart
+for(final x in range(0, 10).stepBy(2)){
+    // code
+}
+// or equivalent
+for(final x in (0, 10).stepBy(2)){
+    // code
+}
+```
+Note `Arr.range(..)` also exists as a more efficient method for when it is known collecting the range is needed.