cell | 易学教程

How to manage UI Table View in View Controller

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问题 I've got a simple UI View, with some items in it. I'd like to place in it a Table View. Can anybody explain me with easy steps what do I have to write in order to manage it? I have another UITableView with elements in it, rows etc. The problem is implementing a TableView in a UI View: I don't know how to add rows etc from there. I tried, with no success, to do the following: @interface SecondViewController : UIViewController <UITableViewDelegate> { UITextField *indirizzo; NSMutableData *data;

Update label in custom UITableView Cell

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问题 I need to Update an label by clicking on an Button in the same cell. Why does my code doesn't work ? @IBAction func actionFaveUnfave(sender: AnyObject) { let cell = self.tableView.cellForRowAtIndexPath(sender.indexPath) println(cell?.labelFavedTimes) cell.labelFavedTimes = "22"} 回答1: cell?.labelFavedTimes.text = "22" BTW self.tableView.cellForRowAtIndexPath(sender.indexPath) can return nil if cell is not visible 回答2: I solved the problem by using superview...here is my solution: let button =

Java线程的JDK8对并发的新支持

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【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 1. LongAdder 和AtomicLong类似的使用方式，但是性能比AtomicLong更好。 LongAdder与AtomicLong都是使用了原子操作来提高性能。但是LongAdder在AtomicLong的基础上进行了热点分离，热点分离类似于有锁操作中的减小锁粒度，将一个锁分离成若干个锁来提高性能。在无锁中，也可以用类似的方式来增加CAS的成功率，从而提高性能。 LongAdder原理图： AtomicLong的实现方式是内部有个value 变量，当多线程并发自增，自减时，均通过CAS 指令从机器指令级别操作保证并发的原子性。唯一会制约AtomicLong高效的原因是高并发，高并发意味着CAS的失败几率更高，重试次数更多，越多线程重试，CAS失败几率又越高，变成恶性循环，AtomicLong效率降低。而LongAdder将把一个value拆分成若干cell，把所有cell加起来，就是value。所以对LongAdder进行加减操作，只需要对不同的cell来操作，不同的线程对不同的cell进行CAS操作，CAS的成功率当然高了（试想一下3+2+1=6，一个线程3+1，另一个线程2+1，最后是8，LongAdder没有乘法除法的API）。可是在并发数不是很高的情况，拆分成若干的cell

Adding style to a ButtonCell

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问题 I know my question is considered initially to refer to the "very novice" level, but I have spent quite o lot of time on searching for the answer. I have used in a gwt application a DataGrid and I have attached a diversity of specific Cell widgets (i.e. TextCell, ButtonCell). My concern is how I can add and handle styling to the button of a ButtonCell through custom css. The code which implements the column of ButtonCells looks like as follows: Column<FilterInfo, String> delButtonColumn = new

excel vba select second to last character in a cell

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问题 I thought this would be simple but can't find the solution anywhere! I am writing a macro to insert a red tick (or down arrow) after the existing text in a cell. ActiveCell.FormulaR1C1 = ActiveCell & " P " The P needs to be formatted bold, red and Wingdings 2. It needs a space after it in case text is added at the end in the future. No problem if it is before the text: With ActiveCell.Characters(Start:=2, length:=1).Font How to select it when it is the second to last character in the cell

Using loops to get multiple values into a cell

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问题 I have 31 subjects (S1, S2, S3, S4, etc.). Each subject has 3 images, contrast1.img, contrast2.img, and contrast3.img. I would like to use a loop to get all paths to the contrasts from all the subjects into a nx1 cell called P. P should be something like this: Data/S1/contrast1.img Data/S1/contrast2.img Data/S1/contrast3.img Data/S2/contrast1.img Data/S2/contrast2.img Data/S2/contrast3.img ... Data/S31/contast3.img This is what I've tried: A={'S1','S2','S3',...,'S31'}; % all the subjects C={

How to separate data from nested cells?

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问题 I have a nested cell as given below A= {1x12 cell} {1x12 cell} {1x12 cell} {1x12 cell} {1x12 cell} I had tried A{:} for getting the data in the above cells and I obtain it as below ans = Columns 1 through 12 '1' '0' '1' '0' '1' '0' '0' '1' '1' '1' '1' '1' ans = Columns 1 through 12 '1' '1' '0' '1' '1' '1' '1' '0' '1' '1' '0' '0' ans = Columns 1 through 12 '0' '1' '1' '1' '0' '0' '0' '0' '1' '1' '0' '0' ans = Columns 1 through 12 '1' '1' '1' '1' '0' '1' '1' '0' '0' '0' '0' '1' ans = Columns 1

How to add multiple links in excel cell?

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问题 When I use ALT+ENTER I get multiple lines of text and could not format them as links. Is there any way to get multiple links in one excel cell? 回答1: Links are tight to cells in Excel, the first link that it detects is the default link for a cell. You can still put : First link (Alt +Enter), Second Link But Still only when clicking on the cell, you will be directed to the first link. As the "links" formatting is map with the cell and no with the text. 回答2: You can use shapes that you can

Javascript for toggling visibility of table cell

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问题 I have a code which creates html reports. It uses html tables to display the results, the tables are sortable, and they are zebra striped automatically, so there is already Javascript and its all embedded inline, so that the file can be simply shared with its users. I don't have a great grasp of Javascript, and doing that already was hard enough. However, a problem now is that sometimes some of the cells have A LOT of data in them. It is by design however, and I am hoping to find an elegant

SQL cell wise trigger

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问题 Can a specific cell wise trigger be created? Or is IF UPDATE(COLUMN) WHERE OTHER_COLUMN LIKE 'JT' the equivalent present in SQL Server 2008? EDIT after getting 2nd answer--- IF not UPDATE(CurrentNo) --// Wanted to do like this : where series ='JT' return IF not EXISTS(SELECT 'True' FROM Inserted i JOIN Deleted d ON i.Series = d.Series WHERE i.Series = 'JT' AND d.Series = 'JT') return Seems ok right! Please comment. 回答1: No. There is no way of doing this declaratively. You would need to create