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What's the difference between the data structure Tree and Graph?
Academically speaking, what's the essential difference between the data structure Tree and Graph? And how about the tree based search and Graph based search?
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Interface vs Base class
... and let's illustrate using C#:
Both a dog and a cat are animals, specifically, quadruped mammals (animals are waaay too general). Let us assume that you have an abstract class Mammal, for both of them:
public abstract class Mammal
This base class will probably have default methods such as:
Fe...
Function in JavaScript that can be called only once
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If by "won't be executed" you mean "will do nothing when called more than once", you can create a closure:
var something = (function() {
var executed = false;
return function() {
if (!executed) {
executed = true;
// do something
}
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Which is the correct C# infinite loop, for (;;) or while (true)? [closed]
...ve used and what I've seen others use for a loop that has to be broken manually.
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Understanding ibeacon distancing
...t 1 meter away. Each beacon must be calibrated with this txPower value to allow accurate distance estimates.
While the distance estimates are useful, they are not perfect, and require that you control for other variables. Be sure you read up on the complexities and limitations before misusing thi...
BigDecimal setScale and round
... leftmost nonzero digit of the exact result. docs.oracle.com/javase/7/docs/api/java/math/BigDecimal.html
– Eddy
Sep 6 '16 at 7:06
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How to change the button text of ?
...file fields of forms. It is a plugin for a jQuery-based component library called Twitter Bootstrap
Sample usage:
Include:
<script type="text/javascript" src="js/bootstrap-filestyle.min.js"> </script>
Via JavaScript:
$(":file").filestyle();
Via data attributes:
<input type="fi...
How to grey out a button?
... disabled by setting the alpha (making it semi-transparent). This is especially useful if your button background is an image, and you don't want to create states for it.
button.setAlpha(.5f);
button.setClickable(false);
update: I wrote the above solution pre Kotlin and when I was a rookie. It's m...
Testing javascript with Mocha - how can I use console.log to debug a test?
...t asynchronous code. I had that issue when testing http requests to a REST API.
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Convert to binary and keep leading zeros in Python
...ction in Python. However, it always removes the leading zeros, which I actually need, such that the result is always 8-bit:
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