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Change IPython/Jupyter notebook working directory
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31 Answers
31
Active
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Style disabled button with CSS
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338
For the disabled buttons you can use the :disabled pseudo-element. It works for all the elemen...
How to find an available port?
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}
Could be used like so:
try {
ServerSocket s = create(new int[] { 3843, 4584, 4843 });
System.out.println("listening on port: " + s.getLocalPort());
} catch (IOException ex) {
System.err.println("no available ports");
}
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Change text color based on brightness of the covered background area?
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Interesting resources for this:
W3C - Ensure that foreground and background color combinations provide sufficient contrast
Calculating the Perceived Brightness of a Color
Here's the W3C algorithm (with JSFiddle demo too):
const rgb = [255, 0, 0];
/...
Is there a documented way to set the iPhone orientation?
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This is no longer an issue on the later iPhone 3.1.2 SDK. It now appears to honor the requested orientation of the view being pushed back onto the stack. That likely means that you would need to detect older iPhone OS versions and only apply the setOrientation when it i...
Reset AutoIncrement in SQL Server after Delete
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edited Dec 24 '12 at 0:34
Ryan Lundy
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ans...
How to enable external request in IIS Express?
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123
In case of a 503 Error, see this: stackoverflow.com/questions/5442551/…
– deerchao
Oct 12 '12 at 3:...
selecting unique values from a column
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361
Use the DISTINCT operator in MySQL:
SELECT DISTINCT(Date) AS Date FROM buy ORDER BY Date DESC...
Why can't (or doesn't) the compiler optimize a predictable addition loop into a multiplication?
...igned two's complement integers, it would change the result (if data[c] is 30000, the product would become -1294967296 for the typical 32-bit ints with wrap around, while 100000 times adding 30000 to sum would, if that doesn't overflow, increase sum by 3000000000). Note that the same holds for unsig...