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How to use timeit module
...care is required so that one pass at an in-place sort doesn't affect the next pass with already sorted data (that, of course, would make the Timsort really shine because it performs best when the data already partially ordered).
Here is an example of how to set up a test for sorting:
>>> ...
Hidden features of Python [closed]
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How to sort a list of lists by a specific index of the inner list?
I have a list of lists. For example,
10 Answers
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Rotating and spacing axis labels in ggplot2
I have a plot where the x-axis is a factor whose labels are long. While probably not an ideal visualization, for now I'd like to simply rotate these labels to be vertical. I've figured this part out with the code below, but as you can see, the labels aren't totally visible.
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What is the combinatory logic equivalent of intuitionistic type theory?
... a good way to finish, but it's the easiest place to get started. The syntax of this type theory is just lambda-calculus with type annotations, Pi-types, and a universe Set.
The Target Type Theory
For completeness' sake, I'll present the rules. Context validity just says you can build contexts fro...
How do you change Background for a Button MouseOver in WPF?
I have a button on my page with this XAML:
6 Answers
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What is the difference between persist() and merge() in JPA and Hibernate?
...avadoc:
The semantics of the persist
operation, applied to an entity X are
as follows:
If X is a new entity, it
becomes managed. The entity X will be
entered into the database at or before
transaction commit or as a result of
the flush operation.
If X is a
preexisting ma...
How to append rows to an R data frame
...ined as:
# pre-allocate space
f3 <- function(n){
df <- data.frame(x = numeric(n), y = character(n), stringsAsFactors = FALSE)
for(i in 1:n){
df$x[i] <- i
df$y[i] <- toString(i)
}
df
}
Here's a similar approach, but one where the data.frame is created as the last step.
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WPF ListView turn off selection
...gt;
<ListView.ItemContainerStyle>
<Style TargetType="{x:Type ListViewItem}">
<Style.Triggers>
<Trigger Property="IsSelected"
Value="True">
<Setter Property="Background"
...
Behaviour of increment and decrement operators in Python
...d - unary operators only work on numbers, but I presume that you wouldn't expect a hypothetical ++ operator to work on strings.)
++count
Parses as
+(+count)
Which translates to
count
You have to use the slightly longer += operator to do what you want to do:
count += 1
I suspect the ++ an...