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What's the difference between a catalog and a schema in a relational database?
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From the relational point of view :
The catalog is the place where--among other things--all of the various schemas (external, conceptual, internal) and all of the corresponding mappings (external/conceptual, conceptual/internal) are kept.
In other words, the catalog ...
Is it possible to execute code once before all tests run?
... launching into a series of test runs, essentially what I would like to do is the same thing as sticking some code in Main() .
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Determine the path of the executing BASH script [duplicate]
...ormalized
if [ -z "$MY_PATH" ] ; then
# error; for some reason, the path is not accessible
# to the script (e.g. permissions re-evaled after suid)
exit 1 # fail
fi
echo "$MY_PATH"
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im...
Re-ordering columns in pandas dataframe based on column name [duplicate]
I have a dataframe with over 200 columns. The issue is as they were generated the order is
11 Answers
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How do I start Mongo DB from Windows?
...tried to start mongodb using the command 'C:\mongodb\bin\mongod.exe' , it is not starting. It is showing admin web console waiting for connections on port 28017 .
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How to specify function types for void (not Void) methods in Java8?
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You are trying to use the wrong interface type. The type Function is not appropriate in this case because it receives a parameter and has a return value. Instead you should use Consumer (formerly known as Block)
The Function type is declared as
interface Function<T,R> {
R apply(T...
Given a view, how do I get its viewController?
...o a UIView . How do I access its UIViewController ? [self superview] is another UIView , but not the UIViewController , right?
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CSS transition shorthand with multiple properties?
...rect syntax for the CSS transition shorthand with multiple properties. This doesn't do anything:
6 Answers
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Auto-indent in Notepad++
We always write code like this formal:
16 Answers
16
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How can I delay a method call for 1 second?
Is there an easy way delay a method call for 1 second?
11 Answers
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