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Standard deviation of a list
I want to find mean and standard deviation of 1st, 2nd,... digits of several (Z) lists. For example, I have
8 Answers
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Maintaining the final state at end of a CSS3 animation
...e set to opacity: 0; in the CSS. The animation class is applied onClick, and, using keyframes, it changes the opacity from 0 to 1 (among other things).
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How to list npm user-installed packages?
...ed package ONLY in npm ? When I do npm -g list it outputs every package and their dependencies, which is not what I want.
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How to convert a double to long without casting?
... d; // x = 1234
This will be faster than going via the wrapper classes - and more importantly, it's more readable. Now, if you need rounding other than "always towards zero" you'll need slightly more complicated code.
shar...
How do I pause my shell script for a second before continuing?
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Use the sleep command.
Example:
sleep .5 # Waits 0.5 second.
sleep 5 # Waits 5 seconds.
sleep 5s # Waits 5 seconds.
sleep 5m # Waits 5 minutes.
sleep 5h # Waits 5 hours.
sleep 5d # Waits 5 days.
One can also employ decimals when specifyin...
LaTeX package for syntax highlighting of code in various languages
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You can use the listings package. It supports many different languages and there are lots of options for customising the output.
\documentclass{article}
\usepackage{listings}
\begin{document}
\begin{lstlisting}[language=html]
<html>
<head>
<title>Hello</title&g...
What is this 'Lambda' everyone keeps speaking of?
...abstract away boilerplate code. For example loops. We're used to write for and while loops all day long. But this is code that does not be written. We could extract the code inside the loop, the most important part of the loop, and abstract away the rest:
for (var i=0; i<array.length; i++) {
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How to chain scope queries with OR instead of AND?
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and just for safety's sake, it's worth expressing this as Person.where("name = ? OR lastname = ?", 'John', 'Smith')
– CambridgeMike
Nov 9 '11 at 3:55
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Hide Utility Class Constructor : Utility classes should not have a public or default constructor
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If this class is only a utility class, you should make the class final and define a private constructor:
public final class FilePathHelper {
private FilePathHelper() {
//not called
}
}
This prevents the default parameter-less constructor from being used elsewhere in your code. Ad...
format date with moment.js
...'MM/DD/YYYY');
Also note that case does matter. For Month, Day of Month, and Year, the format should be uppercase.
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