How to use

splice

function

in

Array

export function reorder(list, sourceIndex, destinationIndex) {
 const result = [...list];
 const [removed] = result.splice(sourceIndex, 1);
 result.splice(destinationIndex, 0, removed);

 return result;
}

// 每次读取时推送一定量数据
 makeData() {
  if (!dataSource.data.length) return null;
  return dataSource.data.splice(dataSource.data.length - 5000).reduce((a,b) => a + '' + b)
 }

onClearTagButtonClick(event) {
    const index = event.target.getAttribute('data-index');
    const newTags = this.state.selectedTags.slice();
    newTags.splice(index, 1);
    this.setState({ selectedTags: newTags });
  }

fs.unlink(path.join(LOCAL_FILES, name), function(err) {
   var index = indexOfUploadFiles(name);
   if (index === -1 || !err || err.code === 'ENOENT') {
    if (index !== -1) {
     uploadFiles.splice(index, 1);
    }
    return callback();
   }
   callback(err);
  });

var addFrame = function(frame) {
 framesList.push(frame);
 if (framesList.length > 600) {
  framesList.splice(0, 80);
 }
}

router.delete('/users/:userId', (req, res) => {
 const userIndex = getUserIndex(req.params.userId)

 if (userIndex === -1) return res.status(404).json({})

 users.splice(userIndex, 1)
 res.json(users)
})

function clearHinder() {
  hinderArray.forEach(function(item, index) {
   if(item.shot) {
    if($('#' + item.id).css('left') == canvasW + 'px' || $('#' + item.id).css('left') == -item.width + 'px') {
     $('#' + item.id).remove()
     hinderArray.splice(index, 1)
    }
   }
  })
  setTimeout(clearHinder, 1000)
 }

constructor(window) {
  this._window = window;
  this._info = JSON.parse(Buffer.from(window.paramsForReuse().data, 'base64').toString('utf8'));
  this._handles = [];
  this._window.on('close', () => this._handles.splice(0).forEach(handle => handle.dispose()));
 }

test('negative priority', async () => {
   delayCount = 0;
   const results = [];
   await Promise.all([
    queue.executeInQueue('delay', '31', { delay: 400, result: '4' }, -10).then(r => results.push(r)),
    queue.executeInQueue('delay', '32', { delay: 100, result: '3' }, -9).then(r => results.push(r)),
    queue.executeInQueue('delay', '33', { delay: 100, result: '2' }, -8).then(r => results.push(r)),
    queue.executeInQueue('delay', '34', { delay: 100, result: '1' }, -7).then(r => results.push(r))
   ]);

   results.splice(0, 1);

   expect(results.map(r => parseInt(r[0], 10) - parseInt(results[0][0], 10))).toEqual([0, 1, 2]);
  });

removeLanguage(locales) {
  if (Array.isArray(locales)) {
   locales.forEach((locale) => this.removeLanguage(locale));
  } else {
   delete this.domainManagers[locales];
   const index = this.locales.indexOf(locales);
   if (index !== -1) {
    this.locales.splice(index, 1);
   }
  }
 }

test('10. Deletes 2 super admin users (successfully)', async () => {
  const users = testData.otherSuperAdminUsers.splice(0, 2);
  const res = await rq({
   url: `/admin/users/batch-delete`,
   method: 'POST',
   body: {
    ids: users.map(u => u.id),
   },
  });

  expect(res.statusCode).toBe(200);
  expect(res.body.data).toMatchObject(users);
 });

resetExcludedStep( stepName ) {
    const index = Flows.excludedSteps.indexOf( stepName );

    if ( index > -1 ) {
      Flows.excludedSteps.splice( index, 1 );
    }
  }

/**
   * Close a client socket
   *
   * @param {Socket} socket
   */
  closeSocket(socket) {
    socket.destroy();

    this.sockets.splice(this.sockets.indexOf(socket), 1);
  }

function delWindowId(tabId){
  var windowId = getWindowId(tabId);
  if(windowId !== -1){
    arrWindows.splice(windowId, 1);
    console.log('closeWindow: { id: '+ windowId + ' }');
  }
}

router.delete('/users/:userId', (req, res) => {
 const userIndex = getUserIndex(req.params.userId)

 if (userIndex === -1) return res.status(404).json({})

 users.splice(userIndex, 1)
 res.json(users)
})