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How to create a loop in bash that is waiting for a webserver to respond?
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Combining the question with chepner's answer, this worked for me:
until $(curl --output /dev/null --silent --head --fail http://myhost:myport); do
printf '.'
sleep 5
done
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upstream sent too big header while reading response header from upstream
...'s a shot in the dark. See here for getting an idea on sizing: gist.github.com/magnetikonline/…
– Wes Johnson
Sep 9 '14 at 15:37
5
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Fast way to get image dimensions (not filesize)
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The file command prints the dimensions for several image formats (e.g. PNG, GIF, JPEG; recent versions also PPM, WEBP), and does only read the header.
The identify command (from ImageMagick) prints lots of image information for a wide...
Cross-reference (named anchor) in markdown
...ser problems, close the tag explicitly using <tag></tag>, as recommended above.
Finally, the attribute name= was deprecated in XHTML, so I originally used id=, which everyone recognises. However, HTML5 now creates a global variable in JavaScript when using id=, and this may not necessar...
What would cause an algorithm to have O(log log n) complexity?
...dresses some of the factors that might cause an algorithm to have O(log n) complexity.
2 Answers
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Possibility of duplicate Mongo ObjectId's being generated in two different collections?
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You completely skipped over the fact that in 136 years you'd have another shot to generate the same ObjectId you had before as long as the machine hash, process ID, and counter all turn out the same
– jamyla...
Shared-memory objects in multiprocessing
...use an operating system that uses copy-on-write fork() semantics (like any common unix), then as long as you never alter your data structure it will be available to all child processes without taking up additional memory. You will not have to do anything special (except make absolutely sure you don...
Dynamically update values of a chartjs chart
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Update: Looks like chartjs has been updated (see comment below). There are some examples up that look very nice:
Here's an example of updating a line chart using new data: http://jsbin.com/yitep/5/edit
Here's how we can update existing data on a line chart: http://jsbin....
How to trim leading and trailing white spaces of a string?
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