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How can I programmatically check whether a keyboard is present in iOS app?
...llers, all of which contain UITextFields. Using this method, i cannot tell from my parent view controller whether the keyboard is shown. The only reliable way is to use the notification method explained in the other answers
– TimWhiting
Jul 16 '15 at 20:43
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round() for float in C++
...tter, lrint to use the current rounding mode instead of round's funky away-from-zero tiebreak.
– Peter Cordes
Nov 17 '17 at 3:41
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Difference Between ViewResult() and ActionResult()
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ActionResult is an abstract class.
ViewResult derives from ActionResult. Other derived classes include JsonResult and PartialViewResult.
You declare it this way so you can take advantage of polymorphism and return different types in the same method.
e.g:
public ActionResult F...
How can I check the extension of a file?
...names. (docs)
os.path.splitext takes a path and splits the file extension from the end of it.
import os
filepaths = ["/folder/soundfile.mp3", "folder1/folder/soundfile.flac"]
for fp in filepaths:
# Split the extension from the path and normalise it to lowercase.
ext = os.path.splitext(fp...
Change File Extension Using C#
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@Alex I am not moving a file, i get file path from broswer like c:\..\..\a.jpg, and the file format on physical path is a.Jpeg, so when i try to delete it, it gives me error cannot find the file on specified path. so i am thinking it has some to do with the file extensio...
return, return None, and no return at all?
...re. return None is never used if there are no other possible return values from the function.
In the following example, we return person's mother if the person given is a human. If it's not a human, we return None since the person doesn't have a mother (let's suppose it's not an animal or something...
Ruby class instance variable vs. class variable
...lass variables, you have the convenience of not having to write self.class from an instance object, and (when desirable) you also get automatic sharing throughout the class hierarchy.
Merging these together into a single example that also covers instance variables on instances:
class Parent
@@...
How does the Meteor JavaScript framework work? [closed]
...eb applications work like this:
You have scripts on server which take data from database and add that dynamically to web-pages and the user-submitted data gets added to databases through some other scrips.
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How does the Java 'for each' loop work?
... java.lang.Iterable -- it doesn't have
to be a list, or some collection from
java.util. Even your own types,
therefore, can be used with this
syntax.
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How do I create delegates in Objective-C?
...ocols. You usually declare a formal protocol. The declaration, paraphrased from UIWebView.h, would look like this:
@protocol UIWebViewDelegate <NSObject>
@optional
- (void)webViewDidStartLoad:(UIWebView *)webView;
// ... other methods here
@end
This is analogous to an interface or abstract ...