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Negative weights using Dijkstra's Algorithm
I am trying to understand why Dijkstra's algorithm will not work with negative weights. Reading an example on Shortest Paths , I am trying to figure out the following scenario:
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How does the Java 'for each' loop work?
...or any object that implements the Iterable interface.
Also, if the right-hand side of the for (:) idiom is an array rather than an Iterable object, the internal code uses an int index counter and checks against array.length instead. See the Java Language Specification.
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Can I pass an array as arguments to a method with variable arguments in Java?
...rds compatibility.
So you should just be able to prepend extraVar to args and call String.format(format, args).
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Difference between JSON.stringify and JSON.parse
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JSON.stringify turns a JavaScript object into JSON text and stores that JSON text in a string, eg:
var my_object = { key_1: "some text", key_2: true, key_3: 5 };
var object_as_string = JSON.stringify(my_object);
// "{"key_1":"some text","key_2":true,"key_3":5}"
typeof(objec...
Unpacking, extended unpacking and nested extended unpacking
...lain with a few examples. Since you're talking about evaluating these "by hand," I'll suggest some simple substitution rules. Basically, you might find it easier to understand an expression if all the iterables are formatted in the same way.
For the purposes of unpacking only, the following substit...
How do I immediately execute an anonymous function in PHP?
... Thanks @Gordon, that's what I thought. I got the impression that salathe and yes123 weren't happy with this method, and I wondered why. Seems perfectly fine to me.
– Bennett McElwee
Jun 21 '13 at 10:47
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How to “inverse match” with regex?
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(?!Andrea).{6}
Assuming your regexp engine supports negative lookaheads..
Edit: ..or maybe you'd prefer to use [A-Za-z]{6} in place of .{6}
Edit (again): Note that lookaheads and lookbehinds are generally not the right way t...
How to iterate over a JavaScript object?
...{
console.log(key, yourobject[key]);
}
With ES6, if you need both keys and values simultaneously, do
for (let [key, value] of Object.entries(yourobject)) {
console.log(key, value);
}
To avoid logging inherited properties, check with hasOwnProperty :
for (let key in yourobject) {
if (y...
How to extract img src, title and alt from html using php? [duplicate]
...e a page where all images which reside on my website are listed with title and alternative representation.
10 Answers
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Pushing read-only GUI properties back into ViewModel
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Yes, I've done this in the past with the ActualWidth and ActualHeight properties, both of which are read-only. I created an attached behavior that has ObservedWidth and ObservedHeight attached properties. It also has an Observe property that is used to do the initial hook-up. U...