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How to randomize (or permute) a dataframe rowwise and columnwise?
...2
a b c
3 0 1 0
4 0 0 0
2 1 0 0
1 1 1 0
By default sample() randomly reorders the elements passed as the first argument. This means that the default size is the size of the passed array. Passing parameter replace=FALSE (the default) to sample(...) ensures that sampling is done without replacem...
Singleton with Arguments in Java
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You can add a configurable initialization method in order to separate instantiation from getting.
public class Singleton {
private static Singleton singleton = null;
private final int x;
private Singleton(int x) {
this.x = x;
}
public static Sing...
Entity Framework: There is already an open DataReader associated with this Command
... use of Include:
var results = myContext.Customers
.Include(x => x.Orders)
.Include(x => x.Addresses)
.Include(x => x.PaymentMethods);
If you use the appropriate Includes, you can avoid enabling MARS. But if you miss one, you'll get the error, so enabling MARS is probably th...
Using the scrollwheel in GNU screen
...e. I was hoping that I would not have to manually enter scrollback mode in order to use the mouse. Thanks.
– JesperE
Jan 24 '09 at 20:34
4
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iTerm2 keyboard shortcut - split pane navigation
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From the documentation:
Cmd] and Cmd[ navigates among split panes in order of use.
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How to create a directory and give permission in single command
...group what I just made (yodirectory),
# (owner,group,others--in that order) where I made it (i.e. in mahome)
#
Now, to add just a tiny bit more about those octal permissions. When you make a directory, "your system" take your default directory perms' [which applies for new d...
Error in exception handler. - Laravel
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Highly active question. Earn 10 reputation in order to answer this question. The reputation requirement helps protect this question from spam and non-answer activity.
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What's the point of NSAssert, actually?
...g a method which calculates the sum of two greater than zero integers. In order to make sure the method was always used as intended you would probably put an assert which tests that condition.
Short answer: They enforce that your code is used only as intended.
...
How do I prevent 'git diff' from using a pager?
..., 'less').
The value is meant to be interpreted by the shell.
The order of preference is:
the $GIT_PAGER environment variable,
then core.pager configuration,
then $PAGER,
and then the default chosen at compile time (usually 'less').
When the LESS environment variabl...
View all TODO items in Visual Studio using GhostDoc
...ms are organized in the same way as the solution. The default view is just ordered alphabetically by file name containing the comment.
– Kijana Woodard
Jun 27 '14 at 3:39
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