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Clear variable in python
...ou were to overwrite keywords - then you would still get errors trying to call a none type. Use del variable
– Dustin K
Aug 21 '19 at 20:53
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What does && mean in void *p = &&abc;
I came across a piece of code void *p = &&abc; . What is the significance of && here?
I know about rvalue references but I think && used in this context is different. What does && indicate in void *p = &&abc; ?
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Showing empty view when ListView is empty
... when the ListView is not empty. I thought the ListView would automatically detect when to show the empty view.
11 Answ...
Generating a SHA-256 hash from the Linux command line
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NOTE: on OS X (BSD), it's echo -n foobar | shasum -a 256
– Olie
Oct 16 '14 at 15:26
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Difference between binary semaphore and mutex
...ere any difference between a binary semaphore and mutex or are they essentially the same?
34 Answers
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Android YouTube app Play Video Intent
...ative app puts out in order to play the YouTube app.
I could do this easially if I had the YouTube program on my emulator, so my 1st question is:
1. Can I download the YouTube app for my emulator, or...
2. What is the intent used when the user selects a video for playback.
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Possible reasons for timeout when trying to access EC2 instance
... could be the reasons why, and what can I do to resolve it? Rebooting normally takes a long time to take effect, and might just makes things worst
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Efficiently test if a port is open on Linux?
... to connect by loopback. If it fails, then the port is closed or we aren't allowed access. Afterwards, close the connection.
Modify this for your use case, such as sending an email, exiting the script on failure, or starting the required service.
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Is there a way to make R beep/play a sound at the end of a script?
...ion sounds in R which should work cross-platform. Run the following to install beepr and make a sound:
install.packages("beepr")
library(beepr)
beep()
More info at github: https://github.com/rasmusab/beepr
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Microsecond timing in JavaScript
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As alluded to in Mark Rejhon's answer, there is an API available in modern browsers that exposes sub-millisecond resolution timing data to script: the W3C High Resolution Timer, aka window.performance.now().
now() is better tha...