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Node.js version on the command line? (not the REPL)
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The command line for that is:
node -v
Or
node --version
Note:
If node -v doesn't work, but nodejs -v does, then something's not set up quite right on your system. See this other question for ways to fix it.
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How can I check for an empty/undefined/null string in JavaScript?
...pecific example. Is there a simple string.Empty available in JavaScript, or is it just a case of checking for "" ?
47 An...
Unable to Cast from Parent Class to Child Class
...he box and silences the people telling the OP that it can't be done (save for one or two trolls)! Thanks for the assist on this one. I've been trying to figure this out for the last couple of hours :)
– derekmx271
Aug 7 '17 at 23:16
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virtualenvwrapper and Python 3
... of virtualenvwrapper is tested under Python3.2. Chances are good it will work with Python3.3 too.
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When is it appropriate to use C# partial classes?
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The biggest use of partial classes is to make life easier for code generators / designers. Partial classes allow the generator to simply emit the code they need to emit and they do not have to deal with user edits to the file. Users are likewise free to annotate the class with new m...
Python circular importing?
So i'm getting this error
7 Answers
7
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What is the fastest or most elegant way to compute a set difference using Javascript arrays?
Let A and B be two sets. I'm looking for really fast or elegant ways to compute the set difference ( A - B or A \B , depending on your preference) between them. The two sets are stored and manipulated as Javascript arrays, as the title says.
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Inner text shadow with CSS
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Here's a little trick I discovered using the :before and :after pseudo-elements:
.depth {
color: black;
position: relative;
}
.depth:before, .depth:after {
content: attr(title);
color: rgba(255,255,255,.1);
position: absolute;
}
.depth:before { top: 1px...
Use dynamic variable names in JavaScript
In PHP you can do amazing/horrendous things like this:
17 Answers
17
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Cosmic Rays: what is the probability they will affect a program?
...uggest that computers typically experience about one cosmic-ray-induced error per 256 megabytes of RAM per month.[15]
This means a probability of 3.7 × 10-9 per byte per month, or 1.4 × 10-15 per byte per second. If your program runs for 1 minute and occupies 20 MB of RAM, then the failure proba...