TypeScript Immutable.Repeat函數代碼示例

const createContentBlock = ( blockData: DraftEntityInstance, contentState: ContentState) => {
  const {key, type, text, data, inlineStyles, entityData} = blockData;
  let blockSpec = {
    type: type != null ? type : 'unstyled',
    text: text != null ? text : '',
    key: key != null ? key : genKey(),
    data: null,
    characterList: List([]),
  };

  if (data) {
    blockSpec.data = fromJS(data)
  }

  if (inlineStyles || entityData) {
    let entityKey;
    if (entityData) {
      const {type, mutability, data} = entityData;
      contentState.createEntity(type, mutability, data);
      entityKey = contentState.getLastCreatedEntityKey();
    } else {
      entityKey = null
    }
    const style = OrderedSet(inlineStyles || [])
    const charData = CharacterMetadata.create({style, entityKey} as CharacterMetadataConfig)
    blockSpec.characterList = List(Repeat(charData, text.length))
  }
  return new ContentBlock(blockSpec)
}

  contentBlocks = contentBlocks.reduce(function (contentBlocks, block) {
    if (block.getType() !== 'blockquote') {
      return contentBlocks.concat(block)
    }
    const image = JSON.parse(block.getText())
    contentState.createEntity('IMAGE-ENTITY', 'IMMUTABLE', image);
    const entityKey = contentState.getLastCreatedEntityKey();
    const charData = CharacterMetadata.create({ entity: entityKey });
    // const blockSpec = Object.assign({ type: 'atomic', text: ' ' }, { entityData })
    // const atomicBlock = createContentBlock(blockSpec)
    // const spacerBlock = createContentBlock({});

    const fragmentArray = [
      new ContentBlock({
        key: genKey(),
        type: 'image-block',
        text: ' ',
        characterList: List(Repeat(charData, charData.count())),
      }),
      new ContentBlock({
        key: genKey(),
        type: 'unstyled',
        text: '',
        characterList: List(),
      }),
    ];

    return contentBlocks.concat(fragmentArray);
  }, []);

 it('fixed repeat', () => {
   var v = Repeat('wtf', 3);
   expect(v.size).toBe(3);
   expect(v.first()).toBe('wtf');
   expect(v.rest().toArray()).toEqual(['wtf','wtf']);
   expect(v.last()).toBe('wtf');
   expect(v.butLast().toArray()).toEqual(['wtf','wtf']);
   expect(v.toArray()).toEqual(['wtf','wtf','wtf']);
   expect(v.join()).toEqual('wtf,wtf,wtf');
 });

import { List, Map as IMap, Record, Repeat } from 'immutable'
import { N_MAP } from '../utils/constants'
import EagleRecord from './EagleRecord'

const MapRecordBase = Record({
  eagle: new EagleRecord(),
  bricks: Repeat(false, N_MAP.BRICK ** 2).toList(),
  steels: Repeat(false, N_MAP.STEEL ** 2).toList(),
  rivers: Repeat(false, N_MAP.RIVER ** 2).toList(),
  snows: Repeat(false, N_MAP.SNOW ** 2).toList(),
  forests: Repeat(false, N_MAP.FOREST ** 2).toList(),
  restrictedAreas: IMap<AreaId, Rect>(),
})

export default class MapRecord extends MapRecordBase {
  static fromJS(object: any) {
    return new MapRecord(object)
      .update('eagle', EagleRecord.fromJS)
      .update('bricks', List)
      .update('steels', List)
      .update('rivers', List)
      .update('snows', List)
      .update('forests', List)
      .update('restrictedAreas', IMap)
  }
}

 const repFlat = (s: List<string>, n: number): any => Repeat(s, n).flatten().take(n);

const emptyTransientKillInfo = Map({
  'player-1': Map({
    basic: -1,
    fast: -1,
    power: -1,
    armor: -1,
  }),
  'player-2': Map({
    basic: -1,
    fast: -1,
    power: -1,
    armor: -1,
  }),
}) as Map<PlayerName, Map<TankLevel, number>>

const defaultRemainingBots = Repeat('basic' as TankLevel, 20).toList()
const defaultPlayerScores = Map<PlayerName, number>([['player-1', 0], ['player-2', 0]])

type GameStatus = 'idle' | 'on' | 'stat' | 'gameover'

const GameRecordBase = Record(
  {
    /** 遊戲狀態 */
    status: 'idle' as GameStatus,
    /** 遊戲是否暫停 */
    paused: false,
    /** 上次進行的關卡名 */
    lastStageName: null as string,
    /** 當前的關卡名 */
    currentStageName: null as string,
    /** 即將開始的關卡的名稱 */

 static unwind(botGroupConfig: BotGroupConfig) {
   return Repeat(botGroupConfig.tankLevel, botGroupConfig.count)
 }

  /**
   * 解析關卡文件中的地圖配置.
   * 地圖配置數據格式為 string[], 數組中每一個string對應地圖中的一行.
   * 一行中包含16個item(由一個或多個空格分隔開來), 對應地圖一行的16個block
   * item的第一個字符標記了block的類型, 各個字母的含義見上方
   * item後續字符(如果存在的話)為十六進製格式, 用來表示該block中哪些部分包含了地圖元素
   * 空白 XX
   * 磚塊 brick  B<n>
   * 河流 river  R
   * 雪地 snow   S
   * 森林 forest F
   * 鋼塊 steel  T<n>
   * 老鷹 eagle  E
   */
  static parseStageMap(map: RawStageConfig['map']) {
    const bricks = new Set<number>()
    const steels = new Set<number>()
    const rivers = new Set<number>()
    const snows = new Set<number>()
    const forests = new Set<number>()
    let eaglePos: Point = null
    for (let row = 0; row < FIELD_BLOCK_SIZE; row += 1) {
      const line = map[row].toLowerCase().split(/ +/)
      for (let col = 0; col < FIELD_BLOCK_SIZE; col += 1) {
        const item = line[col].trim()
        if (item[0] === 'b') {
          // brick
          const bits = StageConfig.parseBrickBits(item.substring(1))
          const brickRow = 4 * row
          const brickCol = 4 * col
          const N = 52

          const part0 = (bits >> 12) & 0xf
          part0 & 0b0001 && bricks.add(brickRow * N + brickCol + 0)
          part0 & 0b0010 && bricks.add(brickRow * N + brickCol + 1)
          part0 & 0b0100 && bricks.add(brickRow * N + brickCol + N)
          part0 & 0b1000 && bricks.add(brickRow * N + brickCol + N + 1)

          const part1 = (bits >> 8) & 0xf
          part1 & 0b0001 && bricks.add(brickRow * N + brickCol + 2 + 0)
          part1 & 0b0010 && bricks.add(brickRow * N + brickCol + 2 + 1)
          part1 & 0b0100 && bricks.add(brickRow * N + brickCol + 2 + N)
          part1 & 0b1000 && bricks.add(brickRow * N + brickCol + 2 + N + 1)

          const part2 = (bits >> 4) & 0xf
          part2 & 0b0001 && bricks.add((brickRow + 2) * N + brickCol + 0)
          part2 & 0b0010 && bricks.add((brickRow + 2) * N + brickCol + 1)
          part2 & 0b0100 && bricks.add((brickRow + 2) * N + brickCol + N)
          part2 & 0b1000 && bricks.add((brickRow + 2) * N + brickCol + N + 1)

          const part3 = (bits >> 0) & 0xf
          part3 & 0b0001 && bricks.add((brickRow + 2) * N + brickCol + 2 + 0)
          part3 & 0b0010 && bricks.add((brickRow + 2) * N + brickCol + 2 + 1)
          part3 & 0b0100 && bricks.add((brickRow + 2) * N + brickCol + 2 + N)
          part3 & 0b1000 && bricks.add((brickRow + 2) * N + brickCol + 2 + N + 1)
        } else if (item[0] === 't') {
          const bits = parseInt(item[1], 16)
          DEV.ASSERT && console.assert(0 < bits && bits < 16)
          if (bits & 0b0001) {
            steels.add(2 * row * 26 + 2 * col)
          }
          if (bits & 0b0010) {
            steels.add(2 * row * 26 + 2 * col + 1)
          }
          if (bits & 0b0100) {
            steels.add((2 * row + 1) * 26 + 2 * col)
          }
          if (bits & 0b1000) {
            steels.add((2 * row + 1) * 26 + 2 * col + 1)
          }
        } else if (item[0] === 'r') {
          rivers.add(row * FIELD_BLOCK_SIZE + col)
        } else if (item[0] === 'f') {
          forests.add(row * FIELD_BLOCK_SIZE + col)
        } else if (item[0] === 's') {
          snows.add(row * FIELD_BLOCK_SIZE + col)
        } else if (item[0] === 'e') {
          if (eaglePos != null) {
            throw new Error('Eagle appears more than once')
          } else {
            eaglePos = {
              x: col * BLOCK_SIZE,
              y: row * BLOCK_SIZE,
            }
          }
        } else if (item[0] !== 'x') {
          throw new Error(`Invalid map at row:${row} col:${col}`)
        }
      }
    }

    return new MapRecord({
      eagle: eaglePos
        ? new EagleRecord({
            x: eaglePos.x,
            y: eaglePos.y,
            broken: false,
          })
        : null,
      bricks: Repeat(false, N_MAP.BRICK ** 2)
//.........這裏部分代碼省略.........