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What's the nearest substitute for a function pointer in Java?
...gFunction sf) {
int i = sf.func("my string");
// do whatever ...
}
And would be called like so:
ref.takingMethod(new StringFunction() {
public int func(String param) {
// body
}
});
EDIT: In Java 8, you could call it with a lambda expression:
ref.takingMethod(param -> ...
Change a Django form field to a hidden field
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If you have a custom template and view you may exclude the field and use {{ modelform.instance.field }} to get the value.
also you may prefer to use in the view:
form.fields['field_name'].widget = forms.HiddenInput()
but I'm not sure it will protect ...
How can I split a string with a string delimiter? [duplicate]
...
string[] tokens = str.Split(new[] { "is Marco and" }, StringSplitOptions.None);
If you have a single character delimiter (like for instance ,), you can reduce that to (note the single quotes):
string[] tokens = str.Split(',');
...
How do I do an initial push to a remote repository with Git?
I've read through countless tutorials and I keep coming up short. Here's what I've got:
6 Answers
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Run a PostgreSQL .sql file using command line arguments
I have some .sql files with thousands of INSERT statements in them and need to run these inserts on my PostgreSQL database in order to add them to a table. The files are that large that it is impossible to open them and copy the INSERT statements into an editor window and run them there. I found on ...
How to hide action bar before activity is created, and then show it again?
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Setting android:windowActionBar="false" truly disables the ActionBar but then, as you say, getActionBar(); returns null.
This is solved by:
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
...
URLWithString: returns nil
...can probably remove the escaping of the localisationName since it will be handled by the escaping of the whole string.
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DatabaseError: current transaction is aborted, commands ignored until end of transaction block?
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This is what postgres does when a query produces an error and you try to run another query without first rolling back the transaction. (You might think of it as a safety feature, to keep you from corrupting your data.)
To fix this, you'll want to figure out where in the code that ...
Display an array in a readable/hierarchical format
... I like this answer too but the OP only wanted the Strings to print, and not the array indices (it seems like). And only 1-dimensional data. I usually only do this to check a recordset of data before I continue with a solution, so this solution works way better for stuff like that.
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Warning :-Presenting view controllers on detached view controllers is discouraged
...oller presentViewController:viewController animated:YES completion:nil];
And then in your modal view controller, when everything is finished, you can just call :
[self dismissViewControllerAnimated:YES completion:nil];
s...