我是Swift开发人员，并且正在尝试在我的代码中采用功能/反应式样式。我一直在我的所有项目中使用 DataGridTableRowModel headerRow = dataGridTableRowList.get(0);
E12CommonUtils.printOnConsole("IN createTableComponent================="+ headerRow);
int width = 50;
final MultiSelectionModel<DataGridTableRowModel> multiSelectionModel = new MultiSelectionModel<DataGridTableRowModel>();
this.setSelectionModel(multiSelectionModel,DefaultSelectionEventManager.<DataGridTableRowModel> createCheckboxManager(0));
multiSelectionModel.addSelectionChangeHandler(new SelectionChangeEvent.Handler()
{
public void onSelectionChange(SelectionChangeEvent event)
{
count++;
E12CommonUtils.printOnConsole("Inside select : ");
Set<DataGridTableRowModel> set = multiSelectionModel.getSelectedSet();
Iterator it = set.iterator();
selectedValues = new StringBuffer();
selectedNames = new StringBuffer();
while (it.hasNext())
{
DataGridTableRowModel row = (DataGridTableRowModel) it.next();
E12CommonUtils.printOnConsole("Inside select = "+ row.getCellText(1));
selectedValues.append(row.getCellText(1) + ":");
E12CommonUtils.printOnConsole("AFTER APPENDING selectedValues = "+ row.getCellText(1));
selectedNames.append(row.getCellData(1).getName() + ":");
}
}
});
E12CommonUtils.printOnConsole("IN $$$$$$$$$$$$$$$$$=================135");
final Column<DataGridTableRowModel, Boolean> checkColumn = new Column<DataGridTableRowModel, Boolean>(new E12CheckBoxCell(false, false))
{
@Override
public Boolean getValue(DataGridTableRowModel dataGridTRModel)
{
boolean isSelected = multiSelectionModel.isSelected(dataGridTRModel);
E12CommonUtils.printOnConsole("checkColumn isSelected["+ isSelected + "]\tprotect["+ dataGridTRModel.getCellData(0).isProtect() + "]");
getFieldUpdater().update(0, dataGridTRModel, isSelected); // If commented deselect all works
return isSelected;
}
};
checkColumn.setFieldUpdater(new FieldUpdater<DataGridTableRowModel, Boolean>()
{
@Override
public void update(int idx,DataGridTableRowModel dataGridTRModel,Boolean value)
{
try
{
CellData cellData = dataGridTRModel.getCellData(0);
cellData.setData(String.valueOf(value));
dataGridTRModel.setCellData(0, cellData);
multiSelectionModel.setSelected(dataGridTRModel, value);
}
catch (Exception e)
{
Window.alert("Exception in checkColumn.setFieldUpdater : "+ e.getMessage());
}
}
});
CheckboxCell checkAll = new CheckboxCell();
// E12CheckBoxCell checkAll = new E12CheckBoxCell(false, false);
Header<Boolean> selectAllHeader = new Header<Boolean>(checkAll){
@Override
public Boolean getValue()
{
E12CommonUtils.printOnConsole("IN getValue()=========");
return false;
}
};
selectAllHeader.setUpdater(new ValueUpdater<Boolean>(){
@Override
public void update(Boolean selected)
{
for (DataGridTableRowModel ele : getVisibleItems())
{
E12CommonUtils.printOnConsole("IN update**************");
multiSelectionModel.setSelected(ele, selected);
}
}
});
this.addColumn(checkColumn, selectAllHeader);
this.setColumnWidth(checkColumn, 20, Unit.PX);
for (int i = 1; i < headerRow.getRowData().size(); i++)
{
final int index = i;
final String colName = headerRow.getCellData(index).getName();
width = 25;// TODO
E12CustomColumn column = new E12CustomColumn(index, false);
this.setColumnWidth(column, width + "px");
// Add a selection model to handle user selection.
ResizableHeader<DataGridTableRowModel> header = new ResizableHeader<DataGridTableRowModel>(colName, this, column) {
@Override
public String getValue()
{
return colName;
}
};
// this.addColumn(column, selectAllHeader,header);
// this.addColumn(selectAllHeader, header);
this.addColumn(column, header);
}
dataProvider.addDataDisplay(this);
dataProvider.refresh();
，我已经开始尝试ReactiveCocoa了。我所看到的一件事是，在项目中，大量使用具有全局范围的curried函数（即不依赖于实例）。
我很想理解为什么全球功能是一个好主意？
这是curry函数所特有的东西还是一般的函数式编程属性？