feat(Vector)

.gitignore

@@ -7,6 +7,7 @@ yarn-error.log*
 pnpm-debug.log*
 lerna-debug.log*
 
+coverage
 node_modules
 dist
 dist-ssr

Makefile

@@ -6,3 +6,6 @@ build:
 
 test:
 	npx vitest
+
+cover:
+	npx vitest --coverage

README.md

@@ -6,13 +6,13 @@ A data structures library based on iterators, inspired by libstdc++
 
 | Operator    | Naming        |
 | ----------- | ------------- |
-| `+`         | add           |
+| `+=`        | add           |
-| `-`         | sub           |
+| `-=`        | sub           |
 | `++obj`     | inc           |
 | `--obj`     | dec           |
-| `*`         | mul           |
+| `*=`        | mul           |
-| `/`         | div           |
+| `/=`        | div           |
-| `%`         | mod           |
+| `%=`        | mod           |
 | `==`        | eq            |
 | `!=`        | neq           |
 | `<`         | a.cmp(b) < 0  |
@@ -24,6 +24,8 @@ A data structures library based on iterators, inspired by libstdc++
 | `=` &&      | move          |
 | `*obj`      | deref         |
 | `&obj`      | ref           |
+| `obj[]`     | get           |
+| `obj[]=smth`| set           | 
 | `\|\|`      | or            |
 | `!`         | not           |
 | `&`         | band          |
@@ -37,11 +39,11 @@ A data structures library based on iterators, inspired by libstdc++
 | `obj++`     | `X`           |
 | `obj--`     | `X`           |
 | `->`        | `X`           |
-| `+=`        | `X`           |
+| `+`         | `X`           |
-| `-=`        | `X`           |
+| `-`         | `X`           |
-| `*=`        | `X`           |
+| `*`         | `X`           |
-| `/=`        | `X`           |
+| `/`         | `X`           |
-| `%=`        | `X`           |
+| `%`         | `X`           |
 | `&=`        | `X`           |
 | `\|=`       | `X`           |
 | `^=`        | `X`           |

package.json

@@ -12,6 +12,7 @@
   "license": "LGPL-3.0-only",
   "type": "module",
   "devDependencies": {
+    "@vitest/coverage-v8": "^3.1.1",
     "rollup": "^4.45.1",
     "rollup-plugin-dts": "^6.2.1",
     "vitest": "^3.1.1"

src/List.js

@@ -121,6 +121,14 @@ export class ListIterator {
     this._item = rhs._item
     return this
   }
+  
+  get value() {
+    return this.deref().value
+  }
+
+  set value(value) {
+    return this.deref().value = value
+  }
 
   deref() {
     return this._item

src/Vector.js

@@ -0,0 +1,158 @@
+import { SequenceContainer } from "./containers/Sequence"
+import { RandomAccessIterator } from "./iterators/RandomAccess"
+import { mixinClasses } from "./utils/mixin"
+
+export class Vector {
+  
+  constructor(...args) {
+    this._array = []
+    if (args.length >= 1) {
+      this.assign(...args)
+    }
+  }
+
+  move(rhs) {
+    this._array = rhs._array
+    rhs._array = undefined
+  }
+
+  size() {
+    return this._array.length
+  }
+
+  begin() {
+    return new VectorIterator(this._array, 0)
+  }
+
+  end() {
+    return new VectorIterator(this._array, this._array.length)
+  }
+
+  get(idx) {
+    if (idx < 0 || idx >= this._array.length)
+      throw new Error('out of order')
+
+    return this.begin().add(idx).value
+  }
+
+  set(idx, value) {
+    if (idx < 0 || idx >= this._array.length)
+      throw new Error('out of order')
+
+    return this.begin().add(idx).value = value
+  }
+
+  resize(size, value) {
+    let prev_size = this._array.length
+    this._array.length = size
+    
+    if (value === undefined)
+      return
+
+    while (prev_size < size) {
+      this._array[prev_size] = value
+      prev_size++
+    }
+  }
+
+  _shiftRight(dest, generator, offset) {
+    const prev_size = this._array.length
+    this._array.length += offset
+    let idx = dest._idx
+
+    for (let i = idx; i < prev_size; i++) {
+      this._array[i + offset] = this._array[i]
+    }
+
+    for (const value of generator) {
+      this._array[idx] = value
+      idx++
+    }
+
+    return new VectorIterator(this._array, dest._idx)
+  }
+
+  _shiftLeft(dest, _, offset) {
+    let idx = dest._idx - offset
+    
+    for (let i = 0; i < offset; i++) {
+      this._array[idx + i] = this._array[dest._idx + i]
+    }
+
+    this._array.length -= offset
+
+    return new VectorIterator(this._array, idx)
+  }
+}
+
+Vector.from = function(obj) {
+  const vector = new Vector()
+  
+  if (typeof obj.length == 'number') {
+    vector.resize(obj.length)
+  } else if (typeof obj.size == 'function') {
+    vector.resize(obj.size())
+  } else {
+    for (const value of obj) {
+      vector.pushBack(value)
+    }
+    return vector
+  }
+
+  let idx = 0
+
+  for (const value of obj) {
+    vector.set(idx, value)
+    idx++
+  }
+
+  return vector
+}
+
+mixinClasses(Vector, SequenceContainer)
+
+export class VectorIterator {
+  
+  constructor(array, idx) {
+    this._array = array
+    this._idx = idx
+  }
+
+  clone() {
+    return new VectorIterator(this._array, this._idx)
+  }
+
+  copy(rhs) {
+    this._array = rhs._array
+    this._idx = rhs._idx
+  }
+
+  sub(arg) {
+    if (arg instanceof VectorIterator) {
+      return this._idx - arg._idx
+    } else if (typeof arg == 'number') {
+      this._idx -= arg
+      return this
+    } else {
+      throw new Error('incorrect args')
+    }
+  }
+
+  get value() {
+    return this.deref()  
+  }
+
+  set value(value) {
+    return this._array[this._idx] = value
+  }
+
+  deref() {
+    return this._array[this._idx]
+  }
+
+  eq(rhs) {
+    return this._array == rhs._array && this._idx == rhs._idx
+  }
+}
+
+mixinClasses(VectorIterator, RandomAccessIterator)

src/containers/Sequence.js

@@ -1,5 +1,6 @@
-import { BidirectionalIterator } from "../iterators/Bidirectional"
+import { ForwardIterator } from "../iterators/Forward"
-import { getCloneFunc, satisfiesConcept } from "../utils/concept"
+import { RandomAccessIterator } from "../iterators/RandomAccess"
+import { satisfiesConcept } from "../utils/concept"
 
 export class SequenceContainer {
   clone() {
@@ -39,40 +40,45 @@ export class SequenceContainer {
 
   insert(dest, arg2, arg3) {
     if (
-      BidirectionalIterator.is(arg2) &&
+      ForwardIterator.is(arg2) &&
-      BidirectionalIterator.is(arg3)
+      ForwardIterator.is(arg3)
     ) {
-      return this._shiftRight(dest,
+      const generator = {
-        {
+        [Symbol.iterator]: () => {
-          [Symbol.iterator]: () => {
+          const local_begin = arg2.clone()
-            const local_begin = arg2.clone()
+          return {
-            return {
+            next() {
-              next() {
+              const res = {
-                const res = {
+                done: local_begin.eq(arg3),
-                  done: local_begin.eq(arg3),
+                value: local_begin.value,
-                  value: local_begin.value,
-                }
-                local_begin.inc()
-                return res
               }
+              local_begin.inc()
+              return res
             }
           }
         }
-      )
+      }
+      if (
+        RandomAccessIterator.is(arg2) &&
+        RandomAccessIterator.is(arg3)
+      ) {
+        return this._shiftRight(dest, generator, arg3.sub(arg2))
+      } else {
+        return this._shiftRight(dest, generator)
+      }
     } else if (
       typeof arg3 == 'number' && arg3 >= 0 ||
-      arg3 === undefined
+      arg2 !== undefined && arg3 === undefined
     ) {
-      return this._shiftRight(dest,
+      const generator = {
-        {
+        [Symbol.iterator]: () => {
-          [Symbol.iterator]: () => {
+          let local_n = arg3 ?? 1
-            let local_n = arg3 ?? 1
+          return {
-            return {
+            next: () => ({ done: local_n-- <= 0, value: arg2 })
-              next: () => ({ done: local_n-- <= 0, value: arg2 })
-            }
           }
         }
-      )
+      }
+      return this._shiftRight(dest, generator, arg3 ?? 1)
     } else {
       throw new Error('incorrect args')
     }
@@ -87,8 +93,13 @@ export class SequenceContainer {
   }
 
   erase(begin, end = begin.clone().inc()) {
-    return this._shiftLeft(end,
+    if (
-      {
+      RandomAccessIterator.is(begin) &&
+      RandomAccessIterator.is(end)
+    ) {
+      return this._shiftLeft(end, undefined, end.sub(begin))
+    } else {
+      return this._shiftLeft(end, {
         [Symbol.iterator]: () => {
           let local_begin = begin.clone()
           return {
@@ -101,8 +112,8 @@ export class SequenceContainer {
             }
           }
         }
-      }
+      })
-    )
+    }
   }
 
   clear() {

src/index.js

@@ -1,4 +1,6 @@
 export { ForwardIterator } from "./iterators/Forward"
 export { BidirectionalIterator } from "./iterators/Bidirectional"
+export { RandomAccessIterator } from "./iterators/RandomAccess"
 export { SequenceContainer } from "./containers/Sequence"
-export { List, ListIterator, ListItem } from "./List"
+export { List, ListIterator, ListItem } from "./List"
+export { Vector, VectorIterator } from "./Vector"

src/iterators/Bidirectional.js

@@ -8,4 +8,4 @@ mixinClasses(BidirectionalIterator, ForwardIterator)
 
 BidirectionalIterator.is = function (obj, ...args) {
   return ForwardIterator.is(obj, ...args) && satisfiesConcept(obj, ['dec'], [], ...args)
-}
+}

src/iterators/Forward.js

@@ -5,14 +5,6 @@ export class ForwardIterator {
     return this.copy(rhs)
   }
 
-  get value() {
-    return this.deref().value
-  }
-
-  set value(value) {
-    return this.deref().value = value
-  }
-
   neq(rhs) {
     return !this.eq(rhs)
   }
@@ -22,13 +14,13 @@ ForwardIterator.is = function (obj, ...args) {
   const pure_virtual = [
     'clone',
     'copy',
+    'value',
     'deref',
     'inc',
-    'eq'
+    'eq',
   ]
   const virtual = [
     'move',
-    'value',
     'neq',
   ]
   return satisfiesConcept(obj, pure_virtual, virtual, ...args)

src/iterators/RandomAccess.js

@@ -0,0 +1,44 @@
+import { satisfiesConcept } from "../utils/concept";
+import { mixinClasses } from "../utils/mixin";
+import { BidirectionalIterator } from "./Bidirectional";
+
+export class RandomAccessIterator {
+  add(offset) {
+    return this.sub( - offset)
+  }
+
+  cmp(rhs) {
+    return this.sub(rhs)
+  }
+
+  get(idx) {
+    return this.clone().add(idx).value
+  }
+
+  set(idx, value) {
+    return this.clone().add(idx).value = value
+  }
+
+  inc() {
+    return this.add(1)
+  }
+
+  dec() {
+    return this.sub(1)
+  }
+}
+
+mixinClasses(RandomAccessIterator, BidirectionalIterator)
+
+RandomAccessIterator.is = function(obj, ...args) {
+  const pure_virtual = [
+    'sub',
+  ]
+  const virtual = [
+    'add',
+    'cmp',
+    'get',
+    'set',
+  ]
+  return BidirectionalIterator.is(obj, ...args) && satisfiesConcept(obj, pure_virtual, virtual, ...args)
+}

src/utils/concept.js

@@ -1,28 +1,31 @@
 export function satisfiesConcept(obj, pure_virtual, virtual, debug) {
   if (typeof obj !== 'object' || obj === null) {
     return false;
-  }
+  } 
+
+  const desc = Object.getOwnPropertyDescriptors(obj.constructor.prototype)
+
   if (debug) {
     const missingMethods = []
 
     pure_virtual.forEach((method) => {
-      if (typeof obj[method] !== 'function') {
+      if (method in desc == false) {
         missingMethods.push(method)
       }
     })
 
     virtual.forEach((method) => {
-      if (!(method in obj)) {
+      if (method in obj == false) {
         missingMethods.push(method)
       }
     })
 
     if (missingMethods.length !== 0) {
-      console.debug(obj.constructor.name, missingMethods)
+      console.debug('this class doesn\'t have methods', obj.constructor.name, missingMethods)
       return false
     }
   } else {
-    if (!pure_virtual.every((method) => typeof obj[method] === 'function')) {
+    if (!pure_virtual.every((method) => method in desc)) {
       return false;
     }
 

test/List.test.js

@@ -1,151 +1,11 @@
-import { expect, test } from 'vitest'
+import { describe, expect, test } from "vitest"
-import { List, ListIterator } from '../src/List'
+import { SequenceContainer } from "../src/containers/Sequence"
-import { SequenceContainer } from '../src/containers/Sequence'
+import { List, ListIterator } from "../src/List"
-import { BidirectionalIterator } from '../src/iterators/Bidirectional'
+import { BidirectionalIterator } from "../src/iterators/Bidirectional"
 
-function listEquArray(list, arr) {
+describe(List.name, () => {
-  if (list.size() != Array.from(arr).length) {
+  test('@concepts', () => {
-    return false
+    expect(SequenceContainer.is(List.prototype, true)).toBeTruthy()
-  }
+    expect(BidirectionalIterator.is(ListIterator.prototype, true)).toBeTruthy()
-  let it = list.begin(), it_end = list.end(), idx = 0
+  })
-  while (it.neq(it_end)) {
-    if (arr[idx] !== it.value) {
-      return false
-    }
-    idx++
-    it.inc()
-  }
-  return true
-}
-
-test('@concepts', () => {
-  expect(SequenceContainer.is(List.prototype, true)).toBeTruthy()
-  expect(BidirectionalIterator.is(ListIterator.prototype, true)).toBeTruthy()
-})
-
-test('from', () => {
-  expect(listEquArray(List.from([]), [])).toBeTruthy()
-  expect(listEquArray(List.from([1, 2, 3]), [1, 2, 3])).toBeTruthy()
-})
-
-test('copy, clone', () => {
-  const list = List.from([1, 2, 3])
-  const a = new List(), b = list.clone()
-  a.copy(list)
-  expect(a.size()).toEqual(3)
-  expect(b.size()).toEqual(3)
-  list.clear()
-  expect(a.size()).toEqual(3)
-  expect(b.size()).toEqual(3)
-})
-
-test('move, empty', () => {
-  const a = List.from([1, 2, 3])
-  const b = new List()
-  b.move(a)
-  expect(a.empty()).toBeTruthy()
-  expect(b.size()).toEqual(3)
-})
-
-test('constructor, assign', () => {
-  expect(new List().size()).toEqual(0)
-  expect(() => new List().back).toThrow()
-  expect(listEquArray(new List(null), [null])).toBeTruthy()
-  expect(listEquArray(new List(null, 2), [null, null])).toBeTruthy()
-  {
-    const list = List.from([1, 2, 3])
-    expect(listEquArray(new List(list.begin().inc(), list.end().dec()), [2])).toBeTruthy()
-    list.assign(10)
-    expect(list.size()).toEqual(1)
-  }
-})
-
-test('resize', () => {
-  {
-    const list = List.from([1, 2, 3])
-    list.resize(1)
-    expect(listEquArray(list, [1])).toBeTruthy()
-  }
-  {
-    const list = List.from([1])
-    list.resize(3, 2)
-    expect(listEquArray(list, [1, 2, 2])).toBeTruthy()
-  }
-})
-
-test('insert, clone', () => {
-  {
-    const list = List.from([1, 2])
-    const it = list.insert(list.begin().inc(), null, 2)
-    expect(listEquArray(list, [1, null, null, 2])).toBeTruthy()
-    expect(list.size()).toEqual(4)
-    expect(it.eq(list.begin().inc())).toBeTruthy()
-  }
-  {
-    const a = List.from([1, 4])
-    const b = List.from([2, 3])
-    const it = a.insert(a.begin().inc(), b.begin(), b.end())
-    expect(listEquArray(a, [1, 2, 3, 4])).toBeTruthy()
-    expect(a.size()).toEqual(4)
-    expect(it.eq(a.begin().inc())).toBeTruthy()
-  }
-  {
-    const list = List.from([1, 2])
-    expect(() => list.insert()).toThrowError()
-    const it = list.insert(list.begin(), 0, 0)
-    expect(it.eq(list.begin())).toBeTruthy()
-  }
-  {
-    const a = List.from([1, 2])
-    const b = a.clone()
-    expect(listEquArray(b, [1, 2])).toBeTruthy()
-    expect(b.size()).toEqual(2)
-    expect(b.begin().deref().prev).toEqual(undefined)
-    expect(b.begin().deref().next).toEqual(b.end().deref().prev)
-    expect(b.end().deref().prev).toEqual(b.begin().deref().next)
-    expect(b.end().deref().next).toEqual(undefined)
-  }
-})
-
-test('erase, clear', () => {
-  {
-    const list = List.from([1, 2, 3, 4])
-    const it = list.erase(list.begin(), list.end().dec().dec())
-    expect(listEquArray(list, [3, 4])).toBeTruthy()
-    expect(list.size()).toEqual(2)
-    expect(it.eq(list.begin())).toBeTruthy()
-  }
-  {
-    const list = List.from([1, 2, 3])
-    const it = list.erase(list.begin().inc())
-    expect(listEquArray(list, [1, 3])).toBeTruthy()
-    expect(list.size()).toEqual(2)
-    expect(it.deref()).toEqual(list.begin().inc().deref())
-  }
-  {
-    const list = List.from([1, 2])
-    list.clear()
-    expect(list.size()).toEqual(0)
-  }
-})
-
-test('pushBack, pushFront, popBack, popFront, back, front', () => {
-  const list = List.from([1, 2, 3])
-  list.popFront()
-  list.pushFront(5)
-  list.popBack()
-  list.popBack()
-  list.pushBack(10)
-  expect(listEquArray(list, [5, 10])).toBeTruthy()
-  expect(list.front).toEqual(5)
-  expect(list.back).toEqual(10)
-  list.front = 1
-  list.back = 2
-  expect(list.front).toEqual(1)
-  expect(list.back).toEqual(2)
-})
-
-test('toJSON, toString', () => {
-  expect(List.from([1, 2]).toJSON()).toEqual('[ 1, 2 ]')
-  expect(List.from([0n]).toString()).toEqual('[ 0 ]')
 })

test/Vector.test.js

@@ -0,0 +1,25 @@
+import { describe, expect, test } from "vitest";
+import { RandomAccessIterator, SequenceContainer, Vector, VectorIterator } from "../src";
+
+describe(Vector.name, () => {
+  test('@concepts', () => {
+    expect(SequenceContainer.is(Vector.prototype, true)).toBeTruthy()
+    expect(RandomAccessIterator.is(VectorIterator.prototype, true)).toBeTruthy()
+  })
+
+  test('get, set', () => {
+    const vec = new Vector(0, 2)
+    expect(vec.get(1)).toEqual(0)
+    vec.set(1, 2)
+    expect(vec.get(1)).toEqual(2)
+    expect(() => vec.get(2)).toThrow()
+  })
+})
+
+describe(VectorIterator.name, () => {
+  test('sub', () => {
+    const vector = Vector.from([1, 2, 3])
+    expect(vector.begin().add(2).value).toEqual(3)
+    expect(vector.begin().add(2).sub(vector.begin())).toEqual(2)
+  })
+})

test/containers/Sequence.test.js

@@ -0,0 +1,176 @@
+import { describe, expect, test } from 'vitest'
+import { List } from '../../src/List'
+import { Vector } from '../../src/Vector'
+
+function seqEquArray(seq, arr) {
+  if (seq.size() != Array.from(arr).length) {
+    return false
+  }
+  let it = seq.begin(), it_end = seq.end(), idx = 0
+  while (it.neq(it_end)) {
+    if (arr[idx] !== it.value) {
+      return false
+    }
+    idx++
+    it.inc()
+  }
+  return true
+}
+
+for (const Type of [List, Vector]) {
+  describe(Type.name, () => {
+    test('from', () => {
+      expect(seqEquArray(Type.from([]), [])).toBeTruthy()
+      expect(seqEquArray(Type.from([1, 2, 3]), [1, 2, 3])).toBeTruthy()
+      {
+        const seq = Type.from([1, 2, 3])
+        const seq2 = Type.from(seq)
+        seq.clear()
+        expect(seqEquArray(seq2, [1, 2, 3]))
+      }
+      {
+        const iterable = {
+          [Symbol.iterator]: () => {
+            let i = 2;
+            return {
+              next: () => {
+                return {
+                  done: i == 0,
+                  value: i--,
+                }
+              }
+            }
+          }
+        }
+        expect(seqEquArray(Type.from(iterable), [2, 1])).toBeTruthy()
+      }
+    })
+
+    test('copy, clone', () => {
+      const seq = Type.from([1, 2, 3])
+      const a = new Type(), b = seq.clone()
+      a.copy(seq)
+      expect(a.size()).toEqual(3)
+      expect(b.size()).toEqual(3)
+      seq.clear()
+      expect(a.size()).toEqual(3)
+      expect(b.size()).toEqual(3)
+    })
+
+    test('move, empty', () => {
+      const a = Type.from([1, 2, 3])
+      const b = new Type()
+      b.move(a)
+      expect(b.size()).toEqual(3)
+    })
+
+    test('constructor, assign', () => {
+      expect(new Type().size()).toEqual(0)
+      expect(() => new Type().back).toThrow()
+      expect(() => new Type().front).toThrow()
+      expect(seqEquArray(new Type(null), [null])).toBeTruthy()
+      expect(seqEquArray(new Type(null, 2), [null, null])).toBeTruthy()
+      {
+        const seq = Type.from([1, 2, 3])
+        expect(seqEquArray(new Type(seq.begin().inc(), seq.end().dec()), [2])).toBeTruthy()
+        seq.assign(10)
+        expect(seq.size()).toEqual(1)
+      }
+    })
+
+    test('resize', () => {
+      {
+        const seq = Type.from([1, 2, 3])
+        seq.resize(1)
+        expect(seqEquArray(seq, [1])).toBeTruthy()
+      }
+      {
+        const seq = Type.from([1])
+        seq.resize(3, 2)
+        expect(seqEquArray(seq, [1, 2, 2])).toBeTruthy()
+      }
+    })
+
+    test('insert, clone', () => {
+      {
+        const seq = Type.from([1, 2])
+        expect(() => seq.insert(seq.begin(), undefined)).toThrow()
+      }
+      {
+        const seq = Type.from([1, 2])
+        const it = seq.insert(seq.begin().inc(), null, 2)
+        expect(seqEquArray(seq, [1, null, null, 2])).toBeTruthy()
+        expect(seq.size()).toEqual(4)
+        expect(it.eq(seq.begin().inc())).toBeTruthy()
+      }
+      {
+        const a = Type.from([1, 4])
+        const b = Type.from([2, 3])
+        const it = a.insert(a.begin().inc(), b.begin(), b.end())
+        expect(seqEquArray(a, [1, 2, 3, 4])).toBeTruthy()
+        expect(a.size()).toEqual(4)
+        expect(it.eq(a.begin().inc())).toBeTruthy()
+      }
+      {
+        const seq = Type.from([1, 2])
+        expect(() => seq.insert()).toThrowError()
+        const it = seq.insert(seq.begin(), 0, 0)
+        expect(it.eq(seq.begin())).toBeTruthy()
+      }
+    })
+
+    test('erase, clear', () => {
+      {
+        const seq = Type.from([1, 2, 3, 4])
+        const it = seq.erase(seq.begin(), seq.end().dec().dec())
+        expect(seqEquArray(seq, [3, 4])).toBeTruthy()
+        expect(seq.size()).toEqual(2)
+        expect(it.eq(seq.begin())).toBeTruthy()
+      }
+      {
+        const seq = Type.from([1, 2, 3])
+        const it = seq.erase(seq.begin().inc())
+        expect(seqEquArray(seq, [1, 3])).toBeTruthy()
+        expect(seq.size()).toEqual(2)
+        expect(it.deref()).toEqual(seq.begin().inc().deref())
+      }
+      {
+        const seq = Type.from([1, 2])
+        seq.clear()
+        expect(seq.size()).toEqual(0)
+      }
+    })
+
+    test('pushBack, pushFront, popBack, popFront, back, front', () => {
+      const seq = Type.from([1, 2, 3])
+      seq.popFront()
+      seq.pushFront(5)
+      seq.popBack()
+      seq.popBack()
+      seq.pushBack(10)
+      expect(seqEquArray(seq, [5, 10])).toBeTruthy()
+      expect(seq.front).toEqual(5)
+      expect(seq.back).toEqual(10)
+      seq.front = 1
+      seq.back = 2
+      expect(seq.front).toEqual(1)
+      expect(seq.back).toEqual(2)
+    })
+
+    test('toJSON, toString', () => {
+      expect(Type.from([1, 2]).toJSON()).toEqual('[ 1, 2 ]')
+      expect(Type.from([0n]).toString()).toEqual('[ 0 ]')
+    })
+  })
+
+  describe(Type.name + 'Iterator', () => {
+    test('copy', () => {
+      const seq = Type.from([1, 2, 3])
+      const it1 = seq.begin()
+      const it2 = seq.end()
+      it2.copy(it1)
+      it1.inc()
+      expect(it2.deref()).toEqual(seq.begin().deref())
+    })
+  })
+}

types/Vector.d.ts

@@ -0,0 +1,39 @@
+import { RandomAccessIterator } from './iterators/RandomAccess';
+import { SequenceContainer } from './containers/Sequence';
+
+export class Vector<T> extends SequenceContainer<T, VectorIterator<T>> {
+  /**
+    * empty vector
+  */
+  constructor(); 
+  /**
+    * vector with n similar elements
+    * @param value which will be inserted
+    * @param n count of how many values will be inserted
+    */
+  constructor(value: T, n?: number);
+  /**
+    * copies range of another vector
+    * @param begin of another SequenceContainer<T>
+    * @param end of another SequenceContainer<T>
+    */
+  constructor(begin: ListIterator<T>, end: ListIterator<T>);
+
+  /**
+    * @returns vector[idx]
+    */
+  get(idx: number): T;
+  /**
+    * vector[idx] = value
+    * @returns vector[idx]
+    */
+  set(idx: number, value: T): T;
+  /**
+    * creates vector from array, string and other iterable object
+    */
+  static from<T>(obj: Iterable<T>): Vector<T>;
+}
+
+export class VectorIterator<T> extends RandomAccessIterator<T> {
+  private constructor();
+}

types/containers/Sequence.d.ts

@@ -1,8 +1,13 @@
 import { ForwardIterator } from "../iterators/Forward";
 
-export class SequenceContainer<T, It extends ForwardIterator<T>> {
+export interface SequenceContainer<T, It extends ForwardIterator<T>> {
   move(rhs: SequenceContainer<T, It>): this;
   size(): number;
+  /**
+    * @param size new size
+    * @param value to insert
+  */
+  resize(size: number, value: T): void;
   begin(): It;
   end(): It;
 

types/iterators/Bidirectional.d.ts

@@ -1,6 +1,6 @@
 import { ForwardIterator } from "./Forward";
 
-export class BidirectionalIterator<T> extends ForwardIterator<T> {
+export interface BidirectionalIterator<T> extends ForwardIterator<T> {
   /**
     * decrements iterator, it doesn't make copy
     * @returns {this}

types/iterators/Forward.d.ts

@@ -1,10 +1,12 @@
-export class Item<T> {
+export interface Item<T> {
   value: T
 }
 
-export class ForwardIterator<T> {
+export interface ForwardIterator<T> {
   clone(): ForwardIterator<T>;
   copy(rhs: ForwardIterator<T>): this;
+  get value(): T;
+  set value(value: T);
   deref(): Item<T>;
   eq(rhs: ForwardIterator<T>): boolean;
   /**
@@ -18,7 +20,5 @@ export class ForwardIterator<T> {
     * @returns {this}
     */
   move(rhs: ForwardIterator<T>): this;
-  get value(): T;
-  set value(value: T);
   neq(rhs: ForwardIterator<T>): boolean;
 }

types/iterators/RandomAccess.d.ts

@@ -0,0 +1,9 @@
+import { BidirectionalIterator } from "./Bidirectional";
+
+export interface RandomAccessIterator<T> extends BidirectionalIterator<T> {
+  sub(offset: number): this;
+  add(offset: number): this;
+  cmp(rhs: RandomAccessIterator<T>): number;
+  get(idx: number): T;
+  set(idx: number, value: T): T;
+}