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Is there a “null coalescing” operator in JavaScript?
...an results in false, the assignment will use the second operand. Beware of all the cases below:
alert(Boolean(null)); // false
alert(Boolean(undefined)); // false
alert(Boolean(0)); // false
alert(Boolean("")); // false
alert(Boolean("false")); // true -- gotcha! :)
This means:
var whatIWant = n...
How can I change an element's class with JavaScript?
...r, going into detail on this is beyond the scope of the answer.
To change all classes for an element:
To replace all existing classes with one or more new classes, set the className attribute:
document.getElementById("MyElement").className = "MyClass";
(You can use a space-delimited list to app...
Best way to parse command line arguments in C#? [closed]
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NDesk.options is great, but doesn't seem to really support console apps with more than one distinct command well. If you want that, try ManyConsole which builds on NDesk.Options: nuget.org/List/Packages/ManyConsole
– Frank Schwieterman
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How can I add a hint text to WPF textbox?
For example, Facebook has a "Search" hint text in the Search text box when the textbox is empty.
14 Answers
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Create a matrix of scatterplots (pairs() equivalent) in ggplot2
Is it possible to plot a matrix of scatter plots with ggplot2 , using ggplot 's nice features like mapping additional factors to color, shape etc. and adding smoother?
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Bash script to cd to directory with spaces in pathname
I'm using Bash on macOS X and I'd like to create a simple executable script file that would change to another directory when it's run. However, the path to that directory has spaces in it. How the heck do you do this? This is what I have...
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Android selector & text color
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Should the selector really reside under res/color folder?
– mr5
Apr 21 '17 at 4:29
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What is an example of the Liskov Substitution Principle?
...the abstraction of having Square inherit from Rectangle is a bad one.
Y'all should check out the other priceless SOLID Principles Motivational Posters.
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How can I get the current page name in WordPress?
...theme.php, inside the function get_page_template(), which is of course is called before your page theme files are parsed, so it is available at any point inside your templates for pages.
Although it doesn't appear to be documented, the $pagename var is only set if you use permalinks. I guess this i...
How do I test a file upload in rails?
...ing to make it available on SO.
The rails framework has a function fixture_file_upload (Rails 2 Rails 3, Rails 5), which will search your fixtures directory for the file specified and will make it available as a test file for the controller in functional testing. To use it:
1) Put your file to be ...