Downcasting is allowed when there is a possibility that it succeeds at run time: In some cases this will not succeed: When a cast (such as this last one) fails at runtime a ClassCastException will be thrown. In other cases it will work: Note that some casts will be disallowed at compile time, because they … Read more
As with most things you should pick which to use based on the context and what is conceptually the correct way to go. A switch is really saying “pick one of these based on this variables value” but an if statement is just a series of boolean checks. As an example, if you were doing: … Read more
Take a look at the API: http://docs.oracle.com/javase/8/javafx/api/javafx/scene/control/ComboBox.html There’s a comboBox.getValue() method which gives you the selected item.
Astonishing that no answer addresses or mentions the actual problem here. The CSS selector button #rock says “give me an element with the id rock inside a <button> element”, like this: But what you wanted is a <button> element with the id rock. And the selector for that would be button#rock (note the missing space between button and #rock). And as @Greg already mentioned: #rock is already specific enough to target the button and … Read more
I figured it out. Had to set listen_addresses=’*’ in postgresql.conf to allow for incoming connections from any ip / all ip
If you have a table called memos that has two columns id and text you should be able to do like this: If a record already contains a row where text is equal to ‘text to insert’ and id is equal to 5, then the insert operation will be ignored. I don’t know if this will work for your particular query, but perhaps … Read more
From SourceTree, click on Tools->Options. Then on the “General” tab, make sure to check the box to allow SourceTree to modify your Git config files. Then switch to the “Diff” tab. On the lower half, use the drop down to select the external program you want to use to do the diffs and merging. I’ve … Read more
try block should be around open. Not around prompt.
None of these did it for me. I did find the answer on MSDN. There were hints to it though. The architecture in the error is referring to 32 vs 64 bits. My solution was to find out which my app is running under (Access) which 2010 is 32b. I found this by looking in … Read more
Go does not have optional parameters nor does it support method overloading: Method dispatch is simplified if it doesn’t need to do type matching as well. Experience with other languages told us that having a variety of methods with the same name but different signatures was occasionally useful but that it could also be confusing and … Read more