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How do I clear the terminal screen in Haskell?
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:! run the shell command
:! cls under windows
:! clear under linux and OS X
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Are loops really faster in reverse?
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is it worth to introduce a variable for array.length and use it in the for loop's head?
– ragatskynet
Oct 30 '12 at 10:13
39
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What characters can be used for up/down triangle (arrow without stem) for display in HTML?
...OINTING TRIANGLE
▾ - U+25BE SMALL BLACK DOWN-POINTING TRIANGLE
For ▲ and ▼ use ▲ and ▼ respectively if you cannot include Unicode characters directly (use UTF-8!).
Note that the font support for the smaller versions is not as good. Better to use the large versions in s...
How to read the RGB value of a given pixel in Python?
... be many different formats.
pix = im.load()
print im.size # Get the width and hight of the image for iterating over
print pix[x,y] # Get the RGBA Value of the a pixel of an image
pix[x,y] = value # Set the RGBA Value of the image (tuple)
im.save('alive_parrot.png') # Save the modified pixels as ...
How can I make my custom objects Parcelable?
I'm trying to make my objects Parcelable. However, I have custom objects and those objects have ArrayList attributes of other custom objects I have made.
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Configuring diff tool with .gitconfig
...ld, xxdiff, emerge, vimdiff, gvimdiff, ecmerge, diffuse, opendiff, p4merge and araxis), and also allows you to specify your own. To use one of the pre-configured difftools (for example, "vimdiff"), you add the following lines to your ~/.gitconfig:
[diff]
tool = vimdiff
Now, you will be able t...
Force Java timezone as GMT/UTC
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Date dateValue = rs.getDate("DateColumn", tzCal);
// Other fields and calculations
}
Or, setting the date in a PreparedStatement:
Calendar tzCal = Calendar.getInstance(TimeZone.getTimeZone("GMT"));
PreparedStatement ps = conn.createPreparedStatement("update ...");
ps.setDate("DateColumn"...
How to change size of split screen emacs windows?
...erwise 'active' (the buffer name is safe, or any unused area to the right hand side), and you can drag up or down.
Side-to-side dragging requires a very precise click on the spot where the two mode lines join.
C-x - (shrink-window-if-larger-than-buffer) will shrink a window to fit its content.
C...
Swift compiler error: “non-modular header inside framework module”
Now I would like to migrate my ObjC framework to Swift and I got the following error:
20 Answers
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How do I find the next commit in git? (child/children of ref)
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To list all the commits, starting from the current one, and then its child, and so on - basically standard git log, but going the other way in time, use something like
git log --reverse --ancestry-path 894e8b4e93d8f3^..master
where 894e8b4e93d8f3 is the first commit you want to...