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What is SELF JOIN and when would you use it? [duplicate]
...data and get information for both people in one row, you could self join like this:
select e1.EmployeeID,
e1.FirstName,
e1.LastName,
e1.SupervisorID,
e2.FirstName as SupervisorFirstName,
e2.LastName as SupervisorLastName
from Employee e1
left outer join Employee e2 on e1.Sup...
how to convert binary string to decimal?
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The parseInt function converts strings to numbers, and it takes a second argument specifying the base in which the string representation is:
var digit = parseInt(binary, 2);
See it in action.
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Eclipse debugger always blocks on ThreadPoolExecutor without any obvious exception, why?
I'm working on my usual projects on Eclipse, it's a J2EE application, made with Spring, Hibernate and so on. I'm using Tomcat 7 for this (no particular reason, I don't exploit any new feature, I just wanted to try that). Every time I debug my application, it happens that Eclipse debugger pops out li...
How to randomize two ArrayLists in the same fashion?
...ized the list of imgList according to the randomization of fileList ? Like in excel, if we sort certain column, the other column will automatically follow?
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Easy way to print Perl array? (with a little formatting)
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AlexAlex
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How to handle Back button with in the dialog?
...ng an application that when the button is pressed, it opens a dialog with OK and Cancel buttons.
8 Answers
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What are the precise rules for when you can omit parenthesis, dots, braces, = (functions), etc.?
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You seem to have stumbled upon the answer. Anyway, I'll try to make it clear.
You can omit dot when using the prefix, infix and postfix notations -- the so called operator notation. While using the operator notation, and only then, you can omit the parenthesis if there is less than two pa...
The cause of “bad magic number” error when loading a workspace and how to avoid it?
I tried to load my R workspace and received this error:
9 Answers
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“x not in y” or “not x in y”
...special cased so that it's not actually using the general operator. This makes not a in b literally the same expression as a not in b, rather than merely an expression that results in the same value.
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Automatically create an Enum based on values in a database lookup table?
...num and subsequently use its values in C# based on values in a database lookup table (using enterprise library data layer)?
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