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How to check if variable's type matches Type stored in a variable
How do I test if some variable is of some type in this way?
4 Answers
4
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JPA getSingleResult() or null
...pdate method which inserts an Entity when it doesn't exist or update it if it does. To enable this, I have to findByIdAndForeignKey , if it returned null insert if not then update. The problem is how do I check if it exists? So I tried getSingleResult . But it throws an exception if the
...
Javascript: How to detect if browser window is scrolled to bottom?
I need to detect if a user is scrolled to the bottom of a page. If they are at the bottom of the page, when I add new content to the bottom, I will automatically scroll them to the new bottom. If they are not at the bottom, they are reading previous content higher on the page, so I don't want to aut...
How can I tell when HttpClient has timed out?
As far as I can tell, there's no way to know that it's specifically a timeout that has occurred. Am I not looking in the right place, or am I missing something bigger?
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How do you check if a JavaScript Object is a DOM Object?
...t. This code is tested in FF3, IE7, Chrome 1 and Opera 9).
//Returns true if it is a DOM node
function isNode(o){
return (
typeof Node === "object" ? o instanceof Node :
o && typeof o === "object" && typeof o.nodeType === "number" && typeof o.nodeName==="string"
...
How to test if one java class extends another at runtime?
How to I test if a is a subclass of b ?
3 Answers
3
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How to check if a file exists in a folder?
I need to check if an xml file exists in the folder.
9 Answers
9
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How can I record a Video in my Android App.?
... finish();
}
}
public void onClick(View v) {
if (recording) {
recorder.stop();
recording = false;
// Let's initRecorder so we can record again
initRecorder();
prepareRecorder();
} else {
re...
How to enable/disable bluetooth programmatically in android
...toothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
if (mBluetoothAdapter.isEnabled()) {
mBluetoothAdapter.disable();
}
For this to work, you must have the following permissions:
<uses-permission android:name="android.permission.BLUETOOTH"/>
<uses-permission ...
When should we call System.exit in Java
In Java, What is the difference with or without System.exit(0) in following code?
10 Answers
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