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How to calculate time elapsed in bash script?

I print the start and end time using date +"%T" , which results in something like: 20 Answers ...
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Large Numbers in Java

... ROMANIA_engineer 44.7k2323 gold badges184184 silver badges169169 bronze badges answered May 11 '09 at 20:04 Fabio Vinicius B...
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How can I tell Moq to return a Task?

... Seth Flowers 8,29522 gold badges2323 silver badges3939 bronze badges answered Jan 21 '14 at 11:04 Panagiotis KanavosPanagiotis Kanavos...
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Django in / not in query

... Olivier Pons 13.5k2323 gold badges9090 silver badges179179 bronze badges answered Aug 26 '11 at 4:49 HarphHarph ...
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How can I loop through a List and grab each item?

.... – Simon Whitehead Sep 18 '13 at 4:32 2 ...
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instantiate a class from a variable in PHP?

...nPaul Dixon 270k4545 gold badges298298 silver badges328328 bronze badges 2 ...
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How does python numpy.where() work?

...t;>> a = np.arange(100) >>> np.where(a > 30) (array([31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, ...
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WCF Service , how to increase the timeout?

...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
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cancelling a handler.postdelayed process

...000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4.61182 48.1414 4.61182C47.4335 4.61182 46.7256 4.91628 46.0943 5.50789C45.7307 4.9328 4...
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Copy a stream to avoid “stream has already been operated upon or closed”

I'd like to duplicate a Java 8 stream so that I can deal with it twice. I can collect as a list and get new streams from that; ...