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How to determine an object's class?
If class B and class C extend class A and I have an object of type B or C , how can I determine of which type it is an instance?
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How to detect if URL has changed after hash in JavaScript
How can I check if a URL has changed in JavaScript? For example, websites like GitHub, which use AJAX, will append page information after a # symbol to create a unique URL without reloading the page. What is the best way to detect if this URL changes?
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$(window).width() not the same as media query
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If you don't have to support IE9 you can just use window.matchMedia() (MDN documentation).
function checkPosition() {
if (window.matchMedia('(max-width: 767px)').matches) {
//...
} else {
//...
}
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What happens to a declared, uninitialized variable in C? Does it have a value?
If in C I write:
10 Answers
10
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Laravel redirect back to original destination after login
...irect the user to "/login"
// and stores the url being accessed on session
if (Auth::guest()) {
return redirect()->guest('login');
}
return $next($request);
On login action:
// redirect the user back to the intended page
// or defaultpage if there isn't one
if (Auth::attempt(['email' =>...
MySQL: Insert record if not exists in table
...Rupert | Somewhere | 022 |
+----+--------+-----------+------+
Insert a different record:
INSERT INTO table_listnames (name, address, tele)
SELECT * FROM (SELECT 'John', 'Doe', '022') AS tmp
WHERE NOT EXISTS (
SELECT name FROM table_listnames WHERE name = 'John'
) LIMIT 1;
Query OK, 1 row af...
Compare version numbers without using split function
...w Version(v2);
var result = version1.CompareTo(version2);
if (result > 0)
Console.WriteLine("version1 is greater");
else if (result < 0)
Console.WriteLine("version2 is greater");
else
Console.WriteLine("versions are equal");
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How can you determine a point is between two other points on a line segment?
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Check if the cross product of (b-a) and (c-a) is 0, as tells Darius Bacon, tells you if the points a, b and c are aligned.
But, as you want to know if c is between a and b, you also have to check that the dot product of (b-a) and ...
How to determine if one array contains all elements of another array
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If using the OP's definition of a1 and a2, and a1 "containing all elements of" a2, I think this should be _ (a1 & a2).size == a2.size _ since a2 is the smaller array, which should have all elements included in the larger ...
Modelling an elevator using Object-Oriented Analysis and Design [closed]
...all active elevators (not in maintenance).
The scheduling will be like:
if available pick a standing elevator for this floor.
else pick an elevator moving to this floor.
else pick a standing elevator on an other floor.
else pick the elevator with the lowest load.
Each elevator has a set of stat...