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Are list-comprehensions and functional functions faster than “for loops”?
...ional list processing functions: While these are written in C and probably outperform equivalent functions written in Python, they are not necessarily the fastest option. Some speed up is expected if the function is written in C too. But most cases using a lambda (or other Python function), the over...
Problems with entering Git commit message with Vim
... message following the presented guidelines
press Esc to make sure you are out of the insert mode
then type :wqEnter or ZZ.
Note that in VIM there are often several ways to do one thing. Here there is a slight difference though. :wqEnter always writes the current file before closing it, while ZZ, ...
What does the 'static' keyword do in a class?
...o" anywhere in your code:
A- in the first scenario (before the change, without using "static"), it would make a new clock every time a "new Hello" is called, but
B- in the second scenario (after the change, using "static"), every "new Hello" instance would still share and use the initial and same "...
Issue with adding common code as git submodule: “already exists in the index”
...I'm afraid there's not enough information in your question to be certain about what's going on, since you haven't replied to my follow-up question, but this may be of help in any case.
That error means that projectfolder is already staged ("already exists in the index"). To find out what's going o...
How to sort a HashSet?
...);
TreeSet myTreeSet = new TreeSet();
myTreeSet.addAll(myHashSet);
System.out.println(myTreeSet); // Prints [1, 12, 23, 45]
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Side-by-side plots with ggplot2
... on the same data, for example if you want to plot different variables without using reshape().
This will plot the output as a side effect. To print the side effect to a file, specify a device driver (such as pdf, png, etc), e.g.
pdf("foo.pdf")
grid.arrange(plot1, plot2)
dev.off()
or, use arran...
Checkout remote branch using git svn
I have checked out a svn repository using git svn. Now I need to checkout one of the branches and track it. Which is the best way to do it?
...
How can I transition height: 0; to height: auto; using CSS?
...
#menu #list {
max-height: 0;
transition: max-height 0.15s ease-out;
overflow: hidden;
background: #d5d5d5;
}
#menu:hover #list {
max-height: 500px;
transition: max-height 0.25s ease-in;
}
<div id="menu">
<a>hover me</a>
<ul id="lis...
Performing a Stress Test on Web Application?
...te walkthrough (in an ecommerce site adding a few items to a cart and checkout).
30 Answers
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RuntimeWarning: invalid value encountered in divide
...
To prevent division by zero you could pre-initialize the output 'out' where the div0 error happens, eg np.where does not cut it since the complete line is evaluated regardless of condition.
example with pre-initialization:
a = np.arange(10).reshape(2,5)
a[1,3] = 0
print(a) #[[...