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How to prove that a problem is NP complete?
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As far as I remember, there is a theorem called the Cook-Levin theorem which states that SAT is NP-complete. That proof is quite a bit more complicated than what I outlined above and I don't think I can explain it in my own words.
– Laila Agaev
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LaTeX Optional Arguments
.... See the documentation for the other types of optional arguments that are allowed.
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Suppress deprecated import warning in Java
...ate source of truth is javac for which the fix doesn't work. This answer really answers the question: stackoverflow.com/a/20909204/2032701
– Ruslan
Sep 26 '17 at 14:12
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String to LocalDate
... class to use is DateTimeFormat, not DateTimeFormatter. In other words, call DateTimeFormat.ofPattern("yyyy-MM-dd").parseLocalDate(yourInput);
– Dan Haywood
Jul 12 '19 at 12:13
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Meaning of Open hashing and Closed hashing
...ast this with open hashing - in this strategy, none of the objects are actually stored in the hash table's array; instead once an object is hashed, it is stored in a list which is separate from the hash table's internal array. "open" refers to the freedom we get by leaving the hash table, and using ...
How to use a different version of python during NPM install?
...e terminal access to a VPS running centos 5.9 and default python 2.4.3 installed. I also installed python 2.7.3 via these commands: (I used make altinstall instead of make install )
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What's the difference between echo, print, and print_r in PHP?
...s, although such usage is rare; echo is slightly faster than print. (Personally, I always use echo, never print.)
var_dump prints out a detailed dump of a variable, including its type and the type of any sub-items (if it's an array or an object). print_r prints a variable in a more human-readable f...
Maven: how to do parallel builds?
...PU machine it would often be possible to build different subprojects in parallel. Is there a way to do this with maven? Is there a plugin for this / whatever?
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Aggregate function in an SQL update query?
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Elegant, easy to implement...Where have you been all day??? I have been banging my head over it for more than an hour now :)
– Ange1
Jan 7 '16 at 19:43
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Looking for files NOT owned by someone
...s -I{} -P3 -- ${cmdhere} {} can have ${cmdhere} operate on each file in parallel. cmdhere ::= standard unix utils; standard unix utils ::= chmod, chown, stat, ls, ...
– Dwight Spencer
Mar 4 '14 at 7:12
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