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Why must we define both == and != in C#?

The C# compiler requires that whenever a custom type defines operator == , it must also define != (see here ). 13 Answe...
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What are the minimum margins most printers can handle?

... Every printer is different but 0.25" (6.35 mm) is a safe bet. share | improve this answer | follow ...
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Composer: how can I install another dependency without updating old ones?

...and I'd like to install another one, but I'd like to keep the others the way they are. So I've edited the composer.json , but if I run composer install , I get the following output: ...
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CSS content property: is it possible to insert HTML instead of Text?

Just wondering if it's possible somehow to make the CSS content property insert html code instead string on :before or :after an element like: ...
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Hook up Raspberry Pi via Ethernet to laptop without router? [closed]

I'm working on a balloon project with a Raspberry Pi. When we potentially recover the Raspberry Pi, it will most likely be in a rural location and I'd like to turn off the Pi at that point safely. ...
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How to iterate over rows in a DataFrame in Pandas

... DataFrame.iterrows is a generator which yields both the index and row (as a Series): import pandas as pd import numpy as np df = pd.DataFrame({'c1': [10, 11, 12], 'c2': [100, 110, 120]}) for index, row in df.iterrows(): print(row['c1'], row['c2']) 10 100 11...
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Relationship between SciPy and NumPy

SciPy appears to provide most (but not all [1]) of NumPy's functions in its own namespace. In other words, if there's a function named numpy.foo , there's almost certainly a scipy.foo . Most of the time, the two appear to be exactly the same, oftentimes even pointing to the same function object. ...
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Difference between objectForKey and valueForKey?

What is the difference between objectForKey and valueForKey ? I looked both up in the documentation and they seemed the same to me. ...
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How to sign an android apk file

I am trying to sign my apk file. I can't figure out how to do it. I can't find good in-depth directions. I have very little programing experience, so any help would be appreciated. ...
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How do I create a nice-looking DMG for Mac OS X using command-line tools?

...application. I want it to be a disk image (DMG), with a predefined size, layout and background image. 14 Answers ...