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Command to get nth line of STDOUT
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Using sed, just for variety:
ls -l | sed -n 2p
Using this alternative, which looks more efficient since it stops reading the input when the required line is printed, may generate a SIGPIPE in the feeding process, which may in turn generate an unwanted error message:
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JSP tricks to make templating easier?
At work I've been tasked with turning a bunch of HTML files into a simple JSP project. It's really all static, no serverside logic to program. I should mention I'm completely new to Java. JSP files seem to make it easy to work with common includes and variables, much like PHP , but I'd like to ...
Prevent text selection after double click
I'm handling the dblclick event on a span in my web app. A side-effect is that the double click selects text on the page. How can I prevent this selection from happening?
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Immutability of Strings in Java
Consider the following example.
26 Answers
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Linux: copy and create destination dir if it does not exist
I want a command (or probably an option to cp) that creates the destination directory if it does not exist.
21 Answers
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What is a segmentation fault?
...lt? Is it different in C and C++? How are segmentation faults and dangling pointers related?
14 Answers
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Detecting a mobile browser
...tmobilebrowsers.com):
Here's a function that uses an insanely long and comprehensive regex which returns a true or false value depending on whether or not the user is browsing with a mobile.
window.mobileCheck = function() {
let check = false;
(function(a){if(/(android|bb\d+|meego).+mobile|ava...
Removing elements by class name?
...e so:
$('.column').remove();
Otherwise, you're going to need to use the parent of each element to remove it:
element.parentNode.removeChild(element);
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“On-line” (iterator) algorithms for estimating statistical median, mode, skewness, kurtosis?
...wness and Kurtosis (along the lines of the variance), see in the same wiki page here the parallel algorithms for higher-moment statistics.
Median
Median is tough without sorted data. If you know, how many data points you have, in theory you only have to partially sort, e.g. by using a selection al...
How to loop through all the properties of a class?
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Use Reflection:
Type type = obj.GetType();
PropertyInfo[] properties = type.GetProperties();
foreach (PropertyInfo property in properties)
{
Console.WriteLine("Name: " + property.Name + ", Value: " + property.GetValue(obj, null));
}
for...