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How to save a BufferedImage as a File
...umentation's Tutorial for Writing/Saving an Image.
The Image I/O class provides the following method for saving an image:
static boolean ImageIO.write(RenderedImage im, String formatName, File output) throws IOException
The tutorial explains that
The BufferedImage class implements the RenderedIma...
When correctly use Task.Run and when just async-await
...
Note the guidelines for performing work on a UI thread, collected on my blog:
Don't block the UI thread for more than 50ms at a time.
You can schedule ~100 continuations on the UI thread per second; 1000 is too much.
There are two t...
java SSL and cert keystore
...forward slashes, /, in place of backslashes, \.
– Droidman
Mar 4 '15 at 19:35
...
Rotating a point about another point (2D)
...values of angle will perform right-ward (clockwise) rotation, and that providing a negative value would perform it left-ward (anti-clockwise)? Or is anti-clockwise a more complicated operation (i.e. calculating the inverse angle and then rotating clockwise by that amount)? I've seen a ton of pages g...
How to modify existing, unpushed commit messages?
...r people. Amending commits essentially rewrites them to have different SHA IDs, which poses a problem if other people have copies of the old commit that you've rewritten. Anyone who has a copy of the old commit will need to synchronize their work with your newly re-written commit, which can sometime...
Can you use if/else conditions in CSS?
...nse, but you can use classes for this, if you have access to the HTML. Consider this:
<p class="normal">Text</p>
<p class="active">Text</p>
and in your CSS file:
p.normal {
background-position : 150px 8px;
}
p.active {
background-position : 4px 8px;
}
That's the CS...
How to make graphics with transparent background in R using ggplot2?
..., y = y, color = group),
fill = "transparent" # for the inside of the boxplot
)
Fastest way is using using rect, as all the rectangle elements inherit from rect:
p <- p +
theme(
rect = element_rect(fill = "transparent") # all rectangles
)
p
More control...
Why is it faster to check if dictionary contains the key, rather than catch the exception in case it
...ointer, regardless of whether those situations are common, and without considering the performance cost.
– LarsH
Apr 19 '13 at 18:37
4
...
In javascript, is an empty string always false as a boolean?
... this edge case whereas if (str) would not.
– Chris Middleton
Sep 17 '16 at 1:55
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What is __gxx_personality_v0 for?
...
It is used in the stack unwiding tables, which you can see for instance in the assembly output of my answer to another question. As mentioned on that answer, its use is defined by the Itanium C++ ABI, where it is called the Personality Routine.
The re...