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Prevent segue in prepareForSegue method?
...have to implement the method
- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender
In your view controller. You do your validation there, and if it's OK then return YES; if it's not then return NO; and the prepareForSegue is not called.
Note that this method doesn't...
How to output messages to the Eclipse console when developing for Android
...tialized or not.
Log.d, Log.v, Log.w etc methods only allow you to print strings to the console and not objects. To circumvent this (if you desire), you must use String.format.
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Simple way to convert datarow array to datatable
...ework 3.5+
DataTable dt = new DataTable();
DataRow[] dr = dt.Select("Your string");
DataTable dt1 = dr.CopyToDataTable();
But if there is no rows in the array, it can cause the errors such as The source contains no DataRows. Therefore, if you decide to use this method CopyToDataTable(), you shoul...
How to process POST data in Node.js?
...eaders: {
'Content-Type': 'application/json'
},
body: JSON.stringify({
user: {
name: "John",
email: "john@example.com"
}
})
});
Node.js: (since Express v4.16.0)
// Parse URL-encoded bodies (as sent by HTML forms)
app.use(express.urlencod...
What is an xs:NCName type and when should it be used?
...pposed to be qualified by different namespaces, then they are NCNames.
xs:string puts no restrictions on your names at all, but xs:NCName basically disallows ":" to appear in the string.
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Java8: Why is it forbidden to define a default method for a method from java.lang.Object
..., I tried to write an interface that defines a default version of the toString method. Java tells me that this is forbidden, since methods declared in java.lang.Object may not be default ed. Why is this the case?
...
Android: create a popup that has multiple selection options
...
You can create a String array with the options you want to show there and then pass the array to an AlertDialog.Builder with the method setItems(CharSequence[], DialogInterface.OnClickListener).
An example:
String[] colors = {"red", "green"...
Actionbar notification count icon (badge) like Google has
...nt = (Button) count.findViewById(R.id.notif_count);
notifCount.setText(String.valueOf(mNotifCount));
return super.onCreateOptionsMenu(menu);
}
private void setNotifCount(int count){
mNotifCount = count;
invalidateOptionsMenu();
}
...
A Java API to generate Java source files [closed]
...ortDeclaration id = ast.newImportDeclaration();
id.setName(ast.newName(new String[] { "java", "util", "Set" }));
cu.imports().add(id);
TypeDeclaration td = ast.newTypeDeclaration();
td.setName(ast.newSimpleName("Foo"));
TypeParameter tp = ast.newTypeParameter();
tp.setName(ast.newSimpleName("X"));
...
Large Numbers in Java
... compute: 58.1 seconds.
*/
public class Main {
public static void main(String... args) {
int place = args.length > 0 ? Integer.parseInt(args[0]) : 250 * 1000;
long start = System.nanoTime();
BigInteger fibNumber = fib(place);
long time = System.nanoTime() - sta...