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NumPy array initialization (fill with identical values)
...th certain values, because it explicitly describes what is being achieved (and it can in principle be very efficient since it performs a very specific task).
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How to change a nullable column to not nullable in a Rails migration?
I created a date column in a previous migration and set it to be nullable. Now I want to change it to be not nullable. How do I go about doing this assuming there are null rows in that database? I'm ok with setting those columns to Time.now if they're currently null.
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Mime type for WOFF fonts?
...omment on Jun 22, 2017:
As of February 2017, RFC8081 is the proposed standard. It defines a top-level media type for fonts, therefore the standard media type for WOFF and WOFF2 are as follows:
font/woff
font/woff2
In January 2011 it was announced that in the meantime Chromium will ...
Logging uncaught exceptions in Python
...d pointed out, sys.excepthook is invoked every time an exception is raised and uncaught. The practical implication of this is that in your code you can override the default behavior of sys.excepthook to do whatever you want (including using logging.exception).
As a straw man example:
>>> i...
Replace whole line containing a string using Sed
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You can use the change command to replace the entire line, and the -i flag to make the changes in-place. For example, using GNU sed:
sed -i '/TEXT_TO_BE_REPLACED/c\This line is removed by the admin.' /tmp/foo
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Java: How to set Precision for double value? [duplicate]
I was working with numbers recently and I had a situation where I want to set the precision of a double value say to 6 digits or 4 digits, depending on the value stored in the database.
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Self-references in object literals / initializers
...To complete my above statement, since foo is beeing declared as a variable and c will only be evaluated at the time it is invoked, using foo inside c will work, as opposed to this (be careful though)
– Bernardo Dal Corno
Apr 19 '18 at 20:11
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How to test equality of Swift enums with associated values
...from Swift 4.1 (due to SE-0185, Swift also supports synthesizing Equatable and Hashable for enums with associated values.
So if you're on Swift 4.1 or newer, the following will automatically synthesize the necessary methods such that XCTAssert(t1 == t2) works. The key is to add the Equatable protoc...
Why do my list item bullets overlap floating elements
... +1: Great CSS, I searched like a crazy for a GOOD VERSATILE soltuion and here it is on SO. The only small draw back is that zoom property does not validate CSS, but I tested and on IE7, IE8 is not necessary, so it's probably just for IE6.
– Marco Demaio
A...
Removing viewcontrollers from navigation stack
...a navigation stack, with say 5 UIViewControllers. I want to remove the 3rd and 4th viewcontrollers in the stack on the click of a button in the 5th viewcontroller. Is it possible to do this? If so how?
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