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Why is ArrayDeque better than LinkedList
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Linked structures are possibly the worst structure to iterate with a cache miss on each element. On top of it they consume way more memory.
If you need add/remove of the both ends, ArrayDeque is significantly better than a linked list. Random access each element is also O(1) fo...
Opening port 80 EC2 Amazon web services [closed]
I've opened port 80 in the web console on my E2C instance's security group but I still can't access it via the public dns in the browser.
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Ruby on Rails: How do you add add zeros in front of a number if it's under 10?
I'm looking to convert single digit numbers to two-digit numbers like so:
4 Answers
4
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Is Task.Result the same as .GetAwaiter.GetResult()?
...sult will throw an AggregateException. However, what's the point of using either of those when it's async? The 100x better option is to use await.
Also, you're not meant to use GetResult(). It's meant to be for compiler use only, not for you. But if you don't want the annoying AggregateException, u...
iPad Safari scrolling causes HTML elements to disappear and reappear with a delay
...he browser to use hardware acceleration more effectively. You can do this with an empty 3d transform:
-webkit-transform: translate3d(0,0,0)
Particularly, you'll need this on child elements that have a position:relative; declaration (or, just go all out and do it to all child elements).
Not a gua...
What is the EAFP principle in Python?
...y the presence of many try and except statements. The technique contrasts with the LBYL style common to many other languages such as C.
An example would be an attempt to access a dictionary key.
EAFP:
try:
x = my_dict["key"]
except KeyError:
# handle missing key
LBYL:
if "key" in my_d...
Populate a Razor Section From a Partial
...t Javascript that is only required by a partial at the bottom of the page with the rest of the Javascript and not in the middle of the page where the partial is rendered.
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Java: Instanceof and Generics
... through my generic data structure for a value's index, I'd like to see if it is even an instance of the type this has been parametrized to.
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SQL: How to properly check if a record exists
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It's better to use either of the following:
-- Method 1.
SELECT 1
FROM table_name
WHERE unique_key = value;
-- Method 2.
SELECT COUNT(1)
FROM table_name
WHERE unique_key = value;
The first alternative should give you no r...
How to convert an array to object in PHP?
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In the simplest case, it's probably sufficient to "cast" the array as an object:
$object = (object) $array;
Another option would be to instantiate a standard class as a variable, and loop through your array while re-assigning the values:
$obje...