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How to implement one-to-one, one-to-many and many-to-many relationships while designing tables?
...ly a PK on one table which guarantees uniqueness, but it may need a unique index on the other table.
– HLGEM
Apr 14 '16 at 18:54
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show 10 m...
Learning to write a compiler [closed]
... I decided to post this reference here: tutorialspoint.com/compiler_design/index.htm What I liked about this site is that it doesn't get involved with actually writing any code to create a compiler, but it does break down the compiler into its parts: phases and stages. It does describe the logic and...
Oracle query to fetch column names
...tion_schema.COLUMNS is USER_TAB_COLS for tables owned by the current user, ALL_TAB_COLS or DBA_TAB_COLS for tables owned by all users.
Tablespace is not equivalent to a schema, neither do you have to provide the tablespace name.
Providing the schema/username would be of use if you want to query AL...
Why declare unicode by string in python?
...cepted since is the most complete one :)
– Oscar Carballal
Jul 3 '10 at 4:38
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The default source...
Are soft deletes a good idea? [duplicate]
...
Also worth mentioning: a UNIQUE index in combination with soft deletes can make for a mess. E.g. trying to register a deleted username will fail, even though it is not in use.
– Danny Beckett
Jul 13 '13 at 21:38
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Cleaner way to update nested structures
...scalaz.TreeLoc). It turns out that the structure of the zipper is automatically derivable from the original data structure, in a manner that resembles symbolic differentiation of an algebraic expression.
But how does this help you with your Scala case classes? Well, Lukas Rytz recently prototyped a...
WCF Service , how to increase the timeout?
...re send back and forth "normal" messages, both can be pretty short - especially the receiveTimeout, since receiving a SOAP message, decrypting, checking and deserializing it should take almost no time. The story is different with streaming - in that case, you might need more time on the client to ac...
Things possible in IntelliJ that aren't possible in Eclipse?
...teJavaScript>function something(){...}</ui:obfuscateJavaScript>
Indexed search across all project.
You can use Find Usages of any Java class or method and it will find where it is used including not only Java classes but Hibernate, Spring, JSP and other places. Rename Method refactoring ...
How to set java_home on Windows 7?
...
Find JDK Installation Directory
First you need to know the installation path for the Java Development Kit.
Open the default installation path for the JDK:
C:\Program Files\Java
There should be a subdirectory like:
C:\Program Files\J...
How is set() implemented?
...is is based on Algorithm D from Knuth Vol. 3, Sec. 6.4.
The initial probe index is computed as hash mod the table size.
Subsequent probe indices are computed as explained in Objects/dictobject.c.
To improve cache locality, each probe inspects a series of consecutive
nearby entries before moving ...