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When to use self over $this?
...ass
From the outside of an instance/class, our rules are quite simple and predictable. We have two operators, and each tells us immediately if we're dealing with an instance or a class static:
-> - object-operator - This is always used when we're accessing an instance.
$bob = new Person;
echo...
Why should weights of Neural Networks be initialized to random numbers? [closed]
...of the whole deep net would be the same as that of a single neuron and the predictions would be nothing better than random.
Nodes that are side-by-side in a hidden layer connected to the same inputs must have different weights for the learning algorithm to update the weights.
By making weights as no...
Why does the expression 0 < 0 == 0 return False in Python?
...
The problem with reverse engineering is its lack of predictive power. It's not the way to learn a new language.
– David Heffernan
Jul 8 '14 at 7:04
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Swift and mutating struct
...question of why immutable is the default? That's because it's very hard to predict the future state of mutating values, and that usually becomes the main source of headaches and bugs. Many people agreed that the solution is avoiding mutable stuffs, and then immutable by default was on top of wish li...
Mod of negative number is melting my brain
...le % more expensive than a test and jump, especially if it can't easily be predicted?
– Medinoc
Oct 25 '17 at 13:58
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What are the differences between a HashMap and a Hashtable in Java?
... of HashMap's subclasses is LinkedHashMap, so in the event that you'd want predictable iteration order (which is insertion order by default), you could easily swap out the HashMap for a LinkedHashMap. This wouldn't be as easy if you were using Hashtable.
Since synchronization is not an issue for ...
In what cases could `git pull` be harmful?
...intentionally rebased out upstream
it modifies your working directory in unpredictable ways
pausing what you are doing to review someone else's work is annoying with git pull
it makes it hard to correctly rebase onto the remote branch
it doesn't clean up branches that were deleted in the remote repo...
What to do Regular expression pattern doesn't match anywhere in string?
...rts becoming less nailed down, once it starts to ramify in ways you cannot predict but which are perfectly legal, once you have to match more different sorts of things or with more complex dependencies, you will eventually reach a point where you have to work harder to effect a solution that uses re...
How does the const constructor actually work?
...onst instance really decide by final field.
And in this case, it cannot be predict in compile-time.
import 'dart:async';
class Foo {
final int i;
final int j = new DateTime.now().millisecond;
const Foo(i) : this.i = i ~/ 10;
toString() => "Foo($i, $j)";
}
void main() {
var f2 = ...
How do you detect Credit card type based on number?
...its (for a complete IIN plus one check digit, which should match the value predicted by the Luhn algorithm).
One further hint: before processing a cardholder PAN, strip any whitespace and punctuation characters from the input. Why? Because it’s typically much easier to enter the digits in group...