$mol_slicer: pager for range with temp push

range3/range3.test.ts → slicer/slicer.test.ts

@@ -8,29 +8,38 @@ namespace $ {
 	}
 
 	function make_range() {
-		const range = new $mol_range3<string>()
 		const chunk_size = 10
 		const chunks = [
 			stub_ids(chunk_size),
 			stub_ids(chunk_size),
 			stub_ids(chunk_size / 2),
 		]
 		const count = chunks.reduce((acc, row) => acc + row.length, 0)
+
+		const range = new $mol_slicer<string>()
 		range.count = () => count
 		range.chunk_size = () => chunk_size
-		range.chunk = offset => chunks[offset]
+		range.chunk = offset => chunks[offset / chunk_size]
 
-		return { range, chunks }
+		return { range, chunks, count }
 	}
 
 	$mol_test({
 
-		'chunk addressing'() {
-			const { range, chunks } = make_range()
+		'chunk addressing'($) {
+			const { range, chunks, count } = make_range()
 			const arr = range.range()
-
-			$mol_assert_equal(arr[0], chunks[0][0])
+			$mol_assert_equal(arr[1], chunks[0][1])
 			$mol_assert_equal(arr.at(-1), chunks.at(-1)?.at(-1))
+		},
+
+		'push temp'($) {
+			const { range, chunks, count } = make_range()
+			const arr = range.range()
+			$mol_assert_equal(arr.length, count)
+			range.push('123')
+			$mol_assert_equal(arr.length, count + 1)
+			$mol_assert_equal(arr.at(-1), '123')
 		}
 
 	})

range3/range3.ts → slicer/slicer.ts

@@ -1,5 +1,5 @@
 namespace $ {
-	export class $mol_range3<Item> extends $mol_range2_array<Item> {
+	export class $mol_slicer<Item> extends $mol_object {
 		count(): number {
 			throw new Error('implement')
 		}
@@ -73,7 +73,7 @@ namespace $ {
 
 		@ $mol_mem
 		range() {
-			return $mol_range2(index => this.at(index), () => this.length, this) as readonly Item[]
+			return $mol_range2(index => this.at(index), () => this.length) as readonly Item[]
 		}
 
 	}