row

问题 I'd like to make something like this (on the new iTunes): As you can see when the row is selected it's "highlight" state is a round cornered row. How can I achieve something like this? 回答1: You need to subclass NSTableview and override -highlightSelectionInClipRect: method. It can be done like this: Change your tableView's highlighting mode from regular to Source list in Attributes Inspector : And now subclass NSTableView like this: -(void)highlightSelectionInClipRect:(NSRect)theClipRect {

问题 I'm trying to create a powershell form that will get all processes into a datagridview (which works OK so far). I'm then adding an additional column infront of the datasource with each row as a checkbox. I'd then like to press a button on my form which starts the Function called Do-Grid, and it is meant to go through and see which checkboxes in this first column have been checked. And this is where I get stuck. I'm unable to figure out how to loop through each row/cell only in this column and

问题 I'm trying to create a powershell form that will get all processes into a datagridview (which works OK so far). I'm then adding an additional column infront of the datasource with each row as a checkbox. I'd then like to press a button on my form which starts the Function called Do-Grid, and it is meant to go through and see which checkboxes in this first column have been checked. And this is where I get stuck. I'm unable to figure out how to loop through each row/cell only in this column and

问题 I want to change color of whole row in my JTable. I defined the JTable: JTable table = new JTable(data, columnNames); where data, columnNames are the String tables. The most common way to do this is to write own class: public class StatusColumnCellRenderer extends DefaultTableCellRenderer { @Override public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int col) { //Cells are by default rendered as a JLabel. JLabel l =

问题 I am facing this problem involving dataframes, so after spending a lot of time on Google, I am opening a question here. I am having a Dataframe - df A B C D 0 8 3 6 2 1 1 -3 5 2 2 4 9 5 10 3 2 -4 -8 -2 I want to sort every row in descending order, but instead of saving the values , I want to save the corresponding column name. Sorted dataframe would look like this - df A B C D 0 8 6 3 2 1 5 2 1 -3 2 10 9 5 4 3 2 -2 -4 -8 What I ultimately want is this structure below, which corresponds to the

问题 I simply try to delete a row from a UITableView with the following code: - (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath { if (editingStyle == UITableViewCellEditingStyleDelete) { [self.tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationFade]; } } The problem is that my app crashes. (GDB: Program received signal: "EXC_BAD_INSTRUCTION".)

问题 Can not find a solution to do something like: SELECT CONCAT_WS(',', ( SELECT * FROM table WHERE id = 1 )) How can I do that in PostgreSQL? 回答1: Quick and dirty: SELECT t::text FROM tbl t WHERE id = 1; t is an alias for the table and not strictly needed. You can use the original table name as well. But if you have a column of the same name it takes precedence. So t represents the row type of the table, which is automatically coerced to text representation on output. I added an explicit cast to

问题 Can not find a solution to do something like: SELECT CONCAT_WS(',', ( SELECT * FROM table WHERE id = 1 )) How can I do that in PostgreSQL? 回答1: Quick and dirty: SELECT t::text FROM tbl t WHERE id = 1; t is an alias for the table and not strictly needed. You can use the original table name as well. But if you have a column of the same name it takes precedence. So t represents the row type of the table, which is automatically coerced to text representation on output. I added an explicit cast to

问题 I've a table which has customers names along with the products they purchased with their prices. So there are multiple records for each customer. This table is simple 3 column table : name, product and price. What I want to do is: Put all records belonging to one customer together (I've done it) and just after these rows add one new extra row which would just show total price of all the products each customer has purchased. This row would have empty cell in name and product column. And would

问题 I have a lot of rows and columns in a very large matrix (184 x 4000, type double), and I want to remove all 0's. The values in the matrix are usually greater than 0 but there are some rows of 0.0000 . I tried to remove the rows with zeros using this: x <- x[which(rowSums(x) > 0),] but what I am left with is a mere 3 rows out of 184. And I know for a fact that the deleted 181 rows were not all 0 rows. Does anyone have a clue why this is happening and how I can fix it? I used this same code on