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How to check if bootstrap modal is open, so i can use jquery validate
... @GregPettit mentions, one can use:
($("element").data('bs.modal') || {})._isShown // Bootstrap 4
($("element").data('bs.modal') || {}).isShown // Bootstrap <= 3
as discussed in Twitter Bootstrap Modal - IsShown.
When the modal is not yet opened, .data('bs.modal') returns undefined, he...
What is the Scala annotation to ensure a tail recursive function is optimized?
...e to Scala version 2.8.0.RC5 (Java HotSpot(TM) 64-Bit Server VM, Java 1.6.0_18).
Type in expressions to have them evaluated.
Type :help for more information.
scala> import scala.annotation.tailrec
import scala.annotation.tailrec
scala> class Tails {
| @tailrec def boom(x: Int): Int = {
...
Time complexity of Sieve of Eratosthenes algorithm
...oose upper-bound is n(1+1/2+1/3+1/4+1/5+1/6+…1/n) (sum of reciprocals of all numbers up to n), which is O(n log n): see Harmonic number. A more proper upper-bound is n(1/2 + 1/3 + 1/5 + 1/7 + …), that is sum of reciprocals of primes up to n, which is O(n log log n). (See here or here.)
The "find...
What is the difference between pull and clone in git?
...
They're basically the same, except clone will setup additional remote tracking branches, not just master. Check out the man page:
Clones a repository into a newly created directory, creates remote-tracking branches for each branch in ...
How can I convert a string to a number in Perl?
...
You don't need to convert it at all:
% perl -e 'print "5.45" + 0.1;'
5.55
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How to trigger a file download when clicking an HTML button or JavaScript
...Edge) and it is not supported in Safari. In 2012 when the answer was originally posted it wasn't supported in any major browser.
– Cfreak
Jul 7 '16 at 3:40
2
...
Vibrate and Sound defaults on notification
...gb format, like 0xffffffff, instead of Color.White, because there's is a small chance of user device use Color(RGB) for a ARGB param and you will get the wrong color. This Happened with me.
– Beto Caldas
Oct 24 '14 at 19:47
...
How to get UILabel to respond to tap?
...= UITapGestureRecognizer(target: self, action: #selector(self.actionTapped(_:)))
tempLabel?.isUserInteractionEnabled = true
tempLabel?.addGestureRecognizer(tapAction)
Action receiver
func actionTapped(_ sender: UITapGestureRecognizer) {
// code here
}
Swift 4.0
Initialize the gesture...
Handling optional parameters in javascript
... second argument is a function or not:
function getData (id, parameters, callback) {
if (arguments.length == 2) { // if only two arguments were supplied
if (Object.prototype.toString.call(parameters) == "[object Function]") {
callback = parameters;
}
}
//...
}
You can also us...
投屏（ScreenCast）使用指导 · App Inventor 2 中文网
...，将同名事件的处理合并到一个事件积木中。
when 按钮_创建.Click() {
ScreenCast1.CreateSession()
}
when ScreenCast1.SessionCreated() {
ScreenCast1.ActivateSession()
}
when ScreenCast1.SessionActivated() {
标签1.Text = "会话已激活"
}
when ScreenCast1.CastError(错...