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How do I get a TextBox to only accept numeric input in WPF?
...ut event. Like so: <TextBox PreviewTextInput="PreviewTextInput" />.
Then inside that set the e.Handled if the text isn't allowed. e.Handled = !IsTextAllowed(e.Text);
I use a simple regex in IsTextAllowed method to see if I should allow what they've typed. In my case I only want to allow numb...
SQL select only rows with max value on a column [duplicate]
...roup-identifier, max-value-in-group (already solved above) in a sub-query. Then you join your table to the sub-query with equality on both group-identifier and max-value-in-group:
SELECT a.id, a.rev, a.contents
FROM YourTable a
INNER JOIN (
SELECT id, MAX(rev) rev
FROM YourTable
GROUP B...
What is the difference between List (of T) and Collection(of T)?
...ding the InsertItem(...) method with a public void new InsertItem(...) and then calling the base.InsertItem(...) from within ? It would still not break the contract. (the name is 'Insert' in List, but nonetheless). So what is the big deal in sticking to Collections<T> ?
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Boolean operators && and ||
... absolutely sure, you should either check first, or use the short form and then use all and any to reduce it to length one for use in control flow statements, like if.
The functions all and any are often used on the result of a vectorized comparison to see if all or any of the comparisons are true,...
Flags to enable thorough and verbose g++ warnings
...he minimal set of includes that should get the maximum level of warning. I then removed from that list the set of warnings that I feel do not actually indicate something bad is happening, or else have too many false positives to be used in a real build. I commented as to why each of the ones I exclu...
Creating a config file in PHP
...array(
'host' => 'localhost',
'username' => 'root',
);
And then:
$configs = include('config.php');
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PG undefinedtable error relation users does not exist
...nnections out of database. By default you use the development environment. Then try to reset database with the following:
rake db:reset
The rake db:reset task will drop the database and set it up again. This is functionally equivalent to rake db:drop db:setup.
This is not the same as runn...
Keyboard shortcut to change font size in Eclipse?
... same type. If the editor type's font is configured to use a default font, then that default font will be zoomed.
So, the font size change is not limited to the current file and the new value of the font size is available here Window > Preferences > General > Appearance > Colors and Fo...
What's is the difference between train, validation and test set, in neural networks?
...aining
else
continue training
Once you're finished training, then you run against your testing set and verify that the accuracy is sufficient.
Training Set: this data set is used to adjust the weights on the neural network.
Validation Set: this data set is used to minimize overfittin...
Xcode 4: create IPA file instead of .xcarchive
... targets, except the application target, and set Skip Install flag to YES. Then do the Product -> Archive tango once again and go to the Organizer to select your new archive. Now, when clicking on the Share button, the .ipa option should be enabled.
I hope this helps.
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