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Underscore.
>>> 5+5
10
>>> _
10
>>> _ + 5
15
>>> _
15
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How to remove item from array by value? [duplicate]
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How to remove duplicate values from a multi-dimensional array in PHP
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Convert dmesg timestamp to custom date format
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Understanding dmesg timestamp is pretty simple: it is time in seconds since the kernel started...
Python using enumerate inside list comprehension
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