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Datatable vs Dataset
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One feature of the DataSet is that if you can call multiple select statements in your stored procedures, the DataSet will have one DataTable for each.
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Visual Studio debugger - Displaying integer values in Hex
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I was able to do it in the Call Stack window in VS2010.
– StuperUser
Jan 19 '11 at 10:28
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Get the full URL in PHP
...e Host header to reach the correct page but might let the page think it is called via another host using the HTTP_X_FORWARDED_HOST header. When the application uses this information (for whatever) it can be indeed a security problem as it allows you to promise something what isn't the case.
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Capistrano - clean up old releases
...mmand fails to remove some files the task seems to silently "succeed" when called via the after hook. Calling it directly shows the errors... I realized this when I was starting to run out of disk space.
– conny
Jul 14 '10 at 10:48
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What is a 'SAM type' in Java?
...ingle abstract method", and "SAM-type" refers to interfaces like Runnable, Callable, etc. Lambda expressions, a new feature in Java 8, are considered a SAM type and can be freely converted to them.
For example, with an interface like this:
public interface Callable<T> {
public T call();
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How to change letter spacing in a Textview?
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Since API 21 there is an option set letter spacing. You can call method setLetterSpacing or set it in XML with attribute letterSpacing.
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Pass a data.frame column name to a function
...ol_name,col1,col2){
df$col_name <- df$col1 + df$col2
df
}
#Call foo() like this:
foo(dat,z,x,y)
The problem here is that df$col1 doesn't evaluate the expression col1. It simply looks for a column in df literally called col1. This behavior is described in ?Extract under the sect...
Python: print a generator expression?
...he generator expression into a list comprehension. It's the same thing and calling list() on it. So the way to make a generator expression into a list is to put brackets around it.
Detailed explanation:
A generator expression is a "naked" for expression. Like so:
x*x for x in range(10)
Now, you...
Understanding scala enumerations
...tation of Enumeration. This is not the assignment of a type! It is instead calling a protected method of the same name, Value, which returns a concrete instance of type Value.
It so happens that you can write val a, b, c = foo in Scala, and for each value a, b, and c the method foo will be called a...
Yes/No message box using QMessageBox
...ault button with an extra argument (Qt "chooses a suitable default automatically" if you don't or specify QMessageBox::NoButton).
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