cell

A robot is located at the top-left corner of a m x n grid (marked 'Start' in the diagram below). The robot can only move either down or right at any point in time. The robot is trying to reach the bottom-right corner of the grid (marked 'Finish' in the diagram below). Now consider if some obstacles are added to the grids. How many unique paths would there be? An obstacle and empty space is marked as 1 and 0 respectively in the grid. Note: m and n will be at most 100. Example 1: Input: [ [0,0,0], [0,1,0], [0,0,0] ] Output: 2 Explanation: There is one obstacle in the middle of the 3x3 grid above

I am facing problem in my app - you can post and edit your favorite places. After posting a post, or editing a specific post ( UITableViewCell ), UITableview is reloaded. My problem is: the UITableview scrolls to the top after reloading. But that's not what I want. I want my view to stay on the cell / view where I was. But I don't know how to manage that. Could you help me? Igor's answer is correct if you are using dynamically resizable cells (UITableViewAutomaticDimension) Here it is in swift 3: private var cellHeights: [IndexPath: CGFloat?] = [:] var expandedIndexPaths: [IndexPath] = [] func

I create an iPhone app base on uitableview and uitabbar. On each cell of tableview i have an "add to favorite button". When i pressed this button, i want to make the cell "jump" from her position to the favorite item of the tabbar (same as download effect in installous) The effect work well if i'am on top 10 cell, but if i scroll in the tableView the effect is not good because start position is calculate from uitableview size. It's possible to know the position of a cell from the visible area. ? Exemple : for the fortieth cell position is x:0,y:1600,w:320,y:50, i want the position from the top

Python中xlrd模块解析 xlrd 导入模块 import xlrd 2、打开指定的excel文件，返回一个data对象 data = xlrd.open_workbook(file) #打开excel表，返回data对象 3、通过data对象可以得到各个sheet对象(一个excel文件可以有多个sheet，每个sheet就是一张表格) Sheet1 = data.sheet_by_index(0) #通过索引顺序获取 sheet_by_index(0)为第一个sheet 同理sheet_by_index(1)为第二个sheet 获取的sheet返回的是16进制地址 # ，如：<xlrd.sheet.Sheet object at 0x000001FC8E966208> Sheet1 = data.sheet_by_name(''sheet名称'') #通过名称获取 同上返回的sheet是一个16进制地址对象 Sheet1 = data.sheets()[0] #通过索引顺序获取 同第一个差不多，效果一样 num =data.nsheets #返回sheet的数目 list = data.sheets() #返回所有sheet对象的列表 list = data.sheet_names() #返回所有sheet对象名字的列表 此方式返回的对象是sheet的展示表名 4

I want to fetch more data from server if the last cell will display, but UICollectionView don't have method -willDisplayCell like UITableview. So I have no idea about this situation, can somebody tell me what should I do , thanks! You can simply implement the fetching operation inside - (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath and check for the condition if(indexPath.row==your_array.count-1). you can also use the scrollview delegate since uicollectionview inherits from uiscrollview , just implement the

1 在vant weapp开发文档上选择要使用的组件 https://youzan.github.io/vant-weapp/#/intro 2 从vant weapp上复制代码，由于是用npm安装的所以路径可以简略 { "usingComponents": { "van-field": "vant-weapp/field" } } <!--引入vant组件库--> <van-cell-group> <van-field value="{{ value }}" placeholder="请写评价" border="{{ false }}" bind:change="onCommentChange" /> </van-cell-group> /** * 页面的初始数据 */ data: { detail: {}, comment:''//评价的内容 }, //事件处理函数，当评价改变时调用 onCommentChange: function (event){ }, 3 得到页面 4 来源： https://www.cnblogs.com/polax/p/11543646.html

访问单个单元格 c = ws['A4'] #返回单元格A4，如果单元格不存在，则会自动创建 ws['A4'] = 4 #为单元格A4赋值为4 d = ws.cell(row=4, column=2, value=10) #给单元格B4赋值为10 　　当一个worksheet在内存中创建时，是不包含任何单元格的，只有当第一次访问时才会被创建 　　当通过cell()函数访问大批量单元格时，这些单元格虽然没有被赋值，但这些单元格却已在内存中创建 for x in range(1,101): for y in range(1,101): ws.cell(row=x, column=y) #会在内存中创建100*100个单元格 访问多个单元格 cell_range = ws['A1':'C2'] #访问从A1到C2的所有单元格 colC = ws['C'] #访问C列的所有单元格 col_range = ws['C:D'] #访问C列和D列的所有单元格 row10 = ws[10] #访问第10行的所有单元格 row_range = ws[5:10] #访问第5行到第10行的所有单元格 #使用Worksheet.iter_rows()方法以行为单位,遍历多个单元格 for row in ws.iter_rows(min_row=1, max_col=3, max_row=2): for