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How to clear a chart from a canvas so that hover events cannot be triggered?
...() then I tried .destroy() and I tried setting my chart reference to null
What finally fixed the issue for me: deleting the <canvas> element and then reappending a new <canvas> to the parent container
My specific code (obviously there's a million ways to do this):
var resetCanvas = ...
What is the use of interface constants?
... are public static and final. I haven't seen any examples of these so far. What are some of the use cases of these Interface Constants and can I see some in the Java Standard Library?
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Unix command to prepend text to a file
...itution command is lexicographically counter-intuitive).
...and hijacking what ryan said above, with sponge you don't need a temporary file:
sudo apt-get install moreutils
<<(echo "to be prepended") < text.txt | sponge text.txt
EDIT: Looks like this doesn't work in Bourne Shell /bin/sh
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Detecting touch screen devices with Javascript
...s_touch_device() {
return !!('ontouchstart' in window);
}
See article: What's the best way to detect a 'touch screen' device using JavaScript?
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Fit Image in ImageButton in Android
... it is not scaled by the user's text size preference.
Here's a snippet of what each button should look like:
<ImageButton
android:id="@+id/button_topleft"
android:layout_width="0dp"
android:layout_height="match_parent"
android:layout_marginBottom="5dp"
...
Retrieve CPU usage and memory usage of a single process on Linux?
... can get it every second and write it to a CSV using the 'watch' command. What command can I use to get this info from the Linux command-line?
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How to get the current user in ASP.NET MVC
...ser property of Controller. If you need it from the view, I would populate what you specifically need in the ViewData, or you could just call User as I think it's a property of ViewPage.
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How to redirect to previous page in Ruby On Rails?
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@strizzwald what does "does not work well" mean? Any details?
– Pascal
Jan 14 '18 at 12:06
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Java Constructor Inheritance
...ry class would end up with a parameterless constructor. That's a bad idea. What exactly would you expect:
FileInputStream stream = new FileInputStream();
to do?
Now potentially there should be a way of easily creating the "pass-through" constructors which are fairly common, but I don't think it ...
Why is the default value of the string type null instead of an empty string?
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You could write an extension method (for what it's worth):
public static string EmptyNull(this string str)
{
return str ?? "";
}
Now this works safely:
string str = null;
string upper = str.EmptyNull().ToUpper();
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