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How do I check for null values in JavaScript?

.... I'm not guessing at anything, I was just being polite. You're bothered by the fact that I answered what they needed and not what they asked, which is absurd. This is SO, most of the time people don't know what they should be asking for. In the context of the original question this answer is co...
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Can I use __init__.py to define global variables?

... @hardmooth: Not exactly. The values are copied by reference, so if you were to mutate MY_CONSTANT in any of the modules, it would mutate everywhere. If you were to re-assign MY_CONSTANT in any of the modules, it would only affect that module. If that's your intention, you...
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How to tell whether a point is to the right or left side of a line

... where M(X,Y) is the query point: position = sign((Bx - Ax) * (Y - Ay) - (By - Ay) * (X - Ax)) It is 0 on the line, and +1 on one side, -1 on the other side. share | improve this answer ...
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How to turn on line numbers in IDLE?

... As it was mentioned by Davos you can use the IDLEX It happens that I'm using Linux version and from all extensions I needed only LineNumbers. So I've downloaded IDLEX archive, took LineNumbers.py from it, copied it to Python's lib folder ( in m...
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Django: Display Choice Value

...n scenario)? Ideally without the overhead of instantiating the Models one by one and calling get_field_display(). – DylanYoung Mar 23 '17 at 17:34 7 ...
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How do detect Android Tablets in general. Useragent?

...search for the string that contains Android and !mobile. Found the article by Tim Bray about this. – ClosDesign Mar 21 '11 at 15:00 6 ...
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How to import a Python class that is in a directory above?

...rt within the same top package without having to mention the package name. By using leading dots in the specified module or package after from you can specify how high to traverse up the current package hierarchy without specifying exact names. One leading dot means the current package where the mod...
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Why does LayoutInflater ignore the layout_width and layout_height layout parameters I've specified?

...etContentView(R.layout.main); ViewGroup parent = (ViewGroup) findViewById(R.id.container); // result: layout_height=wrap_content layout_width=match_parent view = LayoutInflater.from(this).inflate(R.layout.red, null); parent.addView(view); // result: layout_height=100 ...
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Display open transactions in MySQL

... By using this query you can see all open transactions. List All: SHOW FULL PROCESSLIST if you want to kill a hang transaction copy transaction id and kill transaction by using this command: KILL <id> // e.g KILL 1...
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NodeJS: Saving a base64-encoded image to disk

...e64') will convert the input string to a Buffer, which is just an array of bytes, by interpreting the input as a base64 encoded string. Then you can just write that byte array to the file. Update As mentioned in the comments, req.rawBody is no longer a thing. If you are using express/connect then ...