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Troubleshooting “Illegal mix of collations” error in mysql
...set of rules (only one rule in this case): “compare the encodings.” We call this simplest of all possible collations a binary collation.
But what if we want to say that the lowercase and uppercase letters are equivalent? Then we would have at least two rules: (1) treat the lowercase letters...
Detect backspace in empty UITextField
...
deleteBackward() won't be called if you return false in textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool
– igrrik
Feb 6 '19 at 12:12
...
Reading HTML content from a UIWebView
...ch.)
Going the other way (from a UIWebView) is a bit trickier, but is basically the same concept. You'll have to pull the request from the view, then do the fetch as before:
NSURL *requestURL = [[yourWebView request] URL];
NSError *error;
NSString *page = [NSString stringWithContentsOfURL:requestU...
HorizontalScrollView within ScrollView Touch Handling
...ve that the code in onInterceptTouchEvent should split out the two boolean calls, to guarantee that mGestureDetector.onTouchEvent(ev) will get called. As it is now, it won't get called if super.onInterceptTouchEvent(ev) is false. I just ran into a case where clickable children in the scrollview can...
Swift - class method which must be overridden by subclass
...quire you to provide a return value for the method when the execution path calls fatalError.
– bugloaf
Mar 7 '17 at 18:29
3
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How to use QueryPerformanceCounter?
... function returns the number of milliseconds since StartCounter() was last called as a double, so if GetCounter() returns 0.001 then it has been about 1 microsecond since StartCounter() was called.
If you want to have the timer use seconds instead then change
PCFreq = double(li.QuadPart)/1000.0;
...
Bootstrap modal: background jumps to top on toggle
...
If you are calling modal with tag. Try removing '#' from href attribute.And call modal with data attributes.
<button class="btn btn-primary btn-lg" data-toggle="modal" data-target="#myModal">
Launch demo modal
</button>
...
Check if class already assigned before adding
...
Just call addClass(). jQuery will do the check for you. If you check on your own, you are doubling the work, since jQuery will still run the check for you.
...
Is there a difference between “raise exception()” and “raise exception” without parenthesis?
...said, even though the semantics are the same, the first form is microscopically faster, and the second form is more flexible (because you can pass it arguments if needed).
The usual style that most people use in Python (i.e. in the standard library, in popular applications, and in many books) is t...
Does the C++ standard mandate poor performance for iostreams, or am I just dealing with a poor imple
...of the work can
be avoided. With a slightly smarter
linker than is typically used, it is
possible to remove some of these
inefficiencies. This is discussed in
§6.2.3 and §6.2.5.
Since the report was written in 2006 one would hope that many of the recommendations would have been incorpo...