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How to delete a row by reference in data.table?
... (and deleted) at the end, instantly; e.g., a growing time series.
It's filed as an issue: Delete rows by reference.
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System.currentTimeMillis vs System.nanoTime
...ndows/vm/os_windows.cpp in OpenJDK (hg.openjdk.java.net/jdk8/jdk8/hotspot/file/87ee5ee27509/src/os/…). Looks like it's still GetSystemTimeAsFileTime, so I do not know where change comes from. Or if it's even valid. Test before using.
– user3458
Dec 16 '15 at...
Is there a regular expression to detect a valid regular expression?
...t of {} . I am making a script that could grep a code base to find all the files that contain regular expressions
This pattern exploits an extension called recursive regular expressions. This is not supported by the POSIX flavor of regex. You could try with the -P switch, to enable the PCRE regex ...
How do I append one string to another in Python?
...a large string, you can use StringIO or cStringIO. The interface is like a file. ie: you write to append text to it.
If you're just appending two strings then just use +.
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What are the differences between PMD and FindBugs?
...s that PMD works on source code, while FindBugs works on compiled bytecode files. But in terms of capabilities, should it be an either/or choice or do they complement each other?
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Using .otf fonts on web browsers
...ypes are implemented and their hacks here. To get a detailed view of which file-types are supported by which browsers, see:
@font-face Browser Support
EOT Browser Support
WOFF Browser Support
TTF Browser Support
SVG-Fonts Browser Support
hope this helps
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Common xlabel/ylabel for matplotlib subplots
... also be very helpful to include a
fig.tight_layout()
at the end of the file, before the plt.show(), in order to avoid overlapping labels.
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How to Turn Off Showing Whitespace Characters in Visual Studio IDE
... like always being aware of what we're inserting or how we're changing the file. Gives us more casual control over our environment. There are also cases where it's actually critical, such as inside strings that are getting parsed.
– Thought
Jul 6 '14 at 23:30...
Private vs Public in Cache-Control
...ugh them. In the end, it all boils down to the data contained in the pages/files you are sending.
For example, your ISP could have an invisible proxy between you and the Internet, that is caching web pages to reduce the amount of bandwidth needed and lower costs. By using cache-control:private, you...
Python memory usage of numpy arrays
I'm using python to analyse some large files and I'm running into memory issues, so I've been using sys.getsizeof() to try and keep track of the usage, but it's behaviour with numpy arrays is bizarre. Here's an example involving a map of albedos that I'm having to open:
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