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What is “loose coupling?” Please provide examples
...n to keep track of the items we'd have to change the Order class as well.
Now here's a slightly better way to do the same thing:
Less Coupled Example:
public class CartEntry
{
public float Price;
public int Quantity;
public float GetLineItemTotal()
{
return Price * Quanti...
Determine if a String is an Integer in Java [duplicate]
... Scanner(s.trim());
if(!sc.hasNextInt(radix)) return false;
// we know it starts with a valid int, now make sure
// there's nothing left!
sc.nextInt(radix);
return !sc.hasNext();
}
If best practices don't matter to you, or you want to troll the guy who does your code reviews, t...
Move existing, uncommitted work to a new branch in Git
... you have been making commits on your main branch while you coded, but you now want to move those commits to a different branch, this is a quick way:
Copy your current history onto a new branch, bringing along any uncommitted changes too:
git checkout -b <new-feature-branch>
Now force the ...
How to convert local time string to UTC?
...
NOTE -- As of 2020 you should not be using .utcnow() or .utcfromtimestamp(xxx). As you've presumably moved on to python3,you should be using timezone aware datetime objects.
>>> from datetime import timezone
>>> dt_now = datetime.now(tz=timezone.utc)
&g...
How to check if a number is a power of 2
...that
is, the result is true if and only if both its operands are true.
Now let's take a look at how this all plays out:
The function returns boolean (true / false) and accepts one incoming parameter of type unsigned long (x, in this case). Let us for the sake of simplicity assume that someone ...
What is a race condition?
...read scheduling algorithm can swap between threads at any time, you don't know the order in which the threads will attempt to access the shared data. Therefore, the result of the change in data is dependent on the thread scheduling algorithm, i.e. both threads are "racing" to access/change the data....
Xcode warning: “Multiple build commands for output file”
...t. (it's better to make a backup of your project file before deleting it)
Now build the project again. The warning should disappear now.
(this answer is for a previous version of xcode)
share
|
imp...
MySQL: Transactions vs Locking Tables
...posit all the service fees charged on the transaction. Given (as everyone knows these days) that banks are extraordinarily stupid, let's say their system works like this:
$balance = "GET BALANCE FROM your ACCOUNT";
if ($balance < $amount_being_paid) {
charge_huge_overdraft_fees();
}
$balance...
Is it possible to change only the alpha of a rgba background colour on hover?
...
This is now possible with custom properties:
.brown { --rgb: 118, 76, 41; }
.green { --rgb: 51, 91, 11; }
a { display: block; position: relative; }
div { position: absolute; bottom: 0; background-color: rgba(var(--rgb), 0.8); }
a:h...
How to determine when Fragment becomes visible in ViewPager
...ibrary update (rev 11), the user visible hint issue is finally fixed. It's now safe to use user visible hint for ViewPager.
– Oasis Feng
Nov 14 '12 at 3:05
59
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