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What is this operator in MySQL?
...e the regular = operator, two values are compared and the result is either 0 (not equal) or 1 (equal); in other words: 'a' <=> 'b' yields 0 and 'a' <=> 'a' yields 1.
Unlike the regular = operator, values of NULL don't have a special meaning and so it never yields NULL as a possible outco...
What is the meaning of “non temporal” memory accesses in x86
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150
Non-Temporal SSE instructions (MOVNTI, MOVNTQ, etc.), don't follow the normal cache-coherency ru...
How do I get PyLint to recognize numpy members?
...eDavid Clarke
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2
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How to create a inset box-shadow only on one side?
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240
This is what you are looking for. It has examples for each side you want with a shadow.
.top-box...
What is the best way to ensure only one instance of a Bash script is running? [duplicate]
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110
If the script is the same across all users, you can use a lockfile approach. If you acquire the ...
Append values to a set in Python
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420
keep.update(yoursequenceofvalues)
e.g, keep.update(xrange(11)) for your specific example. Or,...
MongoDB Many-to-Many Association
...s _id in the roles array instead of the name:
{name:"Joe"
,roles:["4b5783300334000000000aa9","5783300334000000000aa943","6c6793300334001000000006"]
}
and set up the roles like:
{_id:"6c6793300334001000000006"
,rolename:"Engineer"
}
...
Java - No enclosing instance of type Foo is accessible
...
jacobmjacobm
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Python - write() versus writelines() and concatenated strings
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150
writelines expects an iterable of strings
write expects a single string.
line1 + "\n" + line...
Argparse: Required arguments listed under “optional arguments”?
... argparse
– Devin
Jun 12 '19 at 13:50
@poke: Nice solution! But this doesn't help in case you need mutual exclusive gr...