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Python “extend” for a dictionary
What is the best way to extend a dictionary with another one while avoiding the use of a for loop? For instance:
7 Answer...
`static` keyword inside function?
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Seems like nobody mentioned so far, that static variables inside different instances of the same class remain their state. So be careful when writing OOP code.
Consider this:
class Foo
{
public function call()
{
static $test = 0;
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One line if statement not working
... value. There is no need for the conditional operator to even exist, let alone use it.
BTW: it is customary to name methods which are used to ask a question with a question mark at the end, like this:
@item.rigged?
This shows another problem with using the conditional operator in Ruby:
@item.ri...
Disadvantages of Test Driven Development? [closed]
... changed, tweaked or fine tuned, this can cause a big time investment that one might claim is not justified. So use it when you think it actually fits the system and don't force the design to fit to TDD.
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How to recognize swipe in all 4 directions
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You need to have one UISwipeGestureRecognizer for each direction. It's a little weird because the UISwipeGestureRecognizer.direction property is an options-style bit mask, but each recognizer can only handle one direction. You can send them a...
Hash collision in git
...de up of about 1047 atoms. So if we have 10 Moons... and you randomly pick one atom on one of these moons... and then go ahead and pick a random atom on them again... then the likelihood that you'll pick the same atom twice, is the likelihood that two given git commits will have the same SHA-1 hash....
How do you rename a Git tag?
... if tag is annotated the new tag won't have the message of the old one, but it's a helpful info
– NickSoft
May 26 '11 at 15:34
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Where should @Service annotation be kept? Interface or Implementation?
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I never put @Component (or @Service, ...) at an interface, because this make the interface useless. Let me explain why.
claim 1: If you have an interface then you want to use that interface for the injection point type.
claim 2: The purpose...
What is the difference between IEqualityComparer and IEquatable?
...eciding whether to use IEquatable<T> or IEqualityComparer<T>,
one could ask:
Is there a preferred way of testing two instances of T for equality, or are there several equally valid ways?
If there is only one way of testing two instances of T for equality, or if one of several met...
What's the difference between array_merge and array + array?
...r beginners here, the result of the operation in both cases is null if any one of the arrays is null. Some might not care about this assuming since it is a union operation, the result will be the proper (not-null) array if one of them is null. But, that holds true if one of the arrays is an empty ar...