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What is “Orthogonality”?
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This answer reminds me of "superposition" theory from signal and systems.
– Özgür
Jul 8 '10 at 22:08
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Hook up Raspberry Pi via Ethernet to laptop without router? [closed]
...56 IP addresses (2 hosts up) scanned in 2.71 seconds
Login to your RPi from your laptop (-Y with X-forwarding)
$ssh -Y pi@10.42.0.96
Lo and behold! Now your RPi is connected to your laptop and RPi can share the WiFi connection.
pi@raspberrypi ~ $
Share display & keyboard of your laptop...
What is the difference between a “line feed” and a “carriage return”?
...as \r\n in text files. Unix uses mostly only the \n.
The separation comes from typewriter times, when you turned the wheel to move the paper to change the line and moved the carriage to restart typing on the beginning of a line. This was two steps.
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How to test code dependent on environment variables using JUnit?
...en gets the environment variable using the Environment class, not directly from System.getenv().
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In C#, should I use string.Empty or String.Empty or “” to intitialize a string?
...ore readable is a different matter, however. It's subjective and will vary from person to person - so I suggest you find out what most people on your team like, and all go with that for consistency. Personally I find "" easier to read.
The argument that "" and " " are easily mistaken for each other...
What is an “unwrapped value” in Swift?
...ar cantBeNil : Int = 4
cantBeNil = nil // can't do this
To get the value from your variable if it is optional, you have to unwrap it. This just means putting an exclamation point at the end.
var canBeNil : Int? = 4
println(canBeNil!)
Your code should look like this:
let optionalSquare: Square?...
What happened to console.log in IE8?
...onsole.log like this... you won't see anymore where your logging is coming from. I find that very useful sometimes on top of which is just looks wrong to have every console line originating from the exact same location in your code.
– Martin Westin
Aug 31 '11 a...
How to access the last value in a vector?
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Doesn't work if you want to add stuff from vectors though tail(vector, n=1)-tail(vector, n=2)
– Andreas Storvik Strauman
Mar 19 '18 at 17:47
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How can I prevent the textarea from stretching beyond his parent DIV element? (google-chrome issue o
How can I prevent the textarea from stretching beyond its parent DIV element?
4 Answers
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What is an idempotent operation?
...re than once with the same input parameters. For example, removing an item from a set can be considered an idempotent operation on the set.
In mathematics, an idempotent operation is one where f(f(x)) = f(x). For example, the abs() function is idempotent because abs(abs(x)) = abs(x) for all x.
Th...