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Find rows that have the same value on a column in MySQL
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count(1) works equally well, and is more performant. (Learned that trick from Stack Overflow ;-)
– jpaugh
Jul 18 '16 at 18:32
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Python dictionary: are keys() and values() always the same order?
...e always a 1-to-1 mapping (assuming the dictionary is not altered between calling the 2 methods).
8 Answers
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www-data permissions?
So I have a directory in /var/www (called cake) and I need to allow www-data to write to it, but I also want to write to it (without having to use sudo). I'm afraid to change the permissions to 777 in case some other user on my machine (or a hacker) attempts to modify files in that directory. How do...
Laravel Redirect Back with() Message
...ct::back()->withErrors(['msg', 'The Message']);
and inside your view call this
@if($errors->any())
<h4>{{$errors->first()}}</h4>
@endif
share
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improve this answer
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Android Fragments. Retaining an AsyncTask during screen rotation or configuration change
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Fragments can actually make this a lot easier. Just use the method Fragment.setRetainInstance(boolean) to have your fragment instance retained across configuration changes. Note that this is the recommended replacement for Activity.onRetainn...
Disabled UIButton not faded or grey
...or it. There are two options for you:
First way: If you want to apply for all your buttons in your app, so you can write extension for UIButton like this:
extension UIButton {
open override var isEnabled: Bool{
didSet {
alpha = isEnabled ? 1.0 : 0.5
}
}
}
Se...
Zooming editor window android studio [duplicate]
...know how to zoom in/out of the editor window in android studio? I have actually researched it before people give me minus marks. Ctrl+ and Ctrl- seem to fold and unfold methods, there is no zoom control in the view drop-down and all the googleing ive done has referred my to zoom the control feature...
How to use multiple @RequestMapping annotations in spring?
... That said, I'm having trouble getting the "" or "/" values to actually work in my application. Do they work for you?
– Ed Brannin
May 12 '10 at 19:15
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Stopwatch vs. using System.DateTime.Now for timing events [duplicate]
...time by counting timer ticks in the underlying timer mechanism. If the installed hardware and operating system support a high-resolution performance counter, then the Stopwatch class uses that counter to measure elapsed time. Otherwise, the Stopwatch class uses the system timer to measure elapsed ti...
how to put focus on TextBox when the form load?
...nts and double click the "Shown" event. In the form's shown event handler call the control.Focus() method.
private void myForm_Shown(object sender, EventArgs e)
{
// Call textbox's focus method
txtMyTextbox.Focus();
}
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