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The tilde operator in Python
...pes are just different ways of interpreting bytes. It is the "invert" or "complement" operation, in which all the bits of the input data are reversed.
In Python, for integers, the bits of the twos-complement representation of the integer are reversed (as in b <- b XOR 1 for each individual bit)...
Extract file basename without path and extension in bash [duplicate]
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You don't have to call the external basename command. Instead, you could use the following commands:
$ s=/the/path/foo.txt
$ echo "${s##*/}"
foo.txt
$ s=${s##*/}
$ echo "${s%.txt}"
foo
$ echo "${s%.*}"
foo
Note that this solution should work in all recent (post 2004)...
Assign null to a SqlParameter
...ou are either returning an int value or a DBNull type value, which are not compatible.
You can of course cast the instance of AgeIndex to be type object which would satisfy the ?: requirement.
You can use the ?? null-coalescing operator as follows
SqlParameter[] parameters = new SqlParameter[1]; ...
Modular multiplicative inverse function in Python
Does some standard Python module contain a function to compute modular multiplicative inverse of a number, i.e. a number y = invmod(x, p) such that x*y == 1 (mod p) ? Google doesn't seem to give any good hints on this.
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Intersection and union of ArrayLists in Java
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Undo changes in entity framework entities
...ty. It will not reveret changes in navigation properties / relations.
The common way to "revert changes" is disposing context and reload entities. If you want to avoid reloading you must create clones of entities and modify those clones in new object context. If user cancel changes you will still h...
How do I copy a hash in Ruby?
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Adding a more explicit comment here for those who aren't reading other answers that this is does a shallow copy.
– grumpasaurus
Nov 17 '12 at 16:00
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How to replace a hash key with another key
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How do I find out what keystore my JVM is using?
...check where your JAVA_HOME is configured, possibly one of these places,
Computer--->Advanced --> Environment variables---> JAVA_HOME
Your server startup batch files.
In your import command -keystore cacerts (give full path to the above JRE here instead of just saying cacerts).
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How to make a copy of a file in android?
...ly clause programatically or use try-with-resource new syntax: docs.oracle.com/javase/tutorial/essential/exceptions/…
– earizon
Jul 18 '15 at 17:27
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