大约有 47,000 项符合查询结果（耗时：0.0539秒） [XML]
M_PI works with math.h but not with cmath in Visual Studio
...
Interestingly I checked this on an app of mine and I got the same error.
I spent a while checking through headers to see if there was anything undef'ing the _USE_MATH_DEFINES and found nothing.
So I moved the
#define _USE_MATH_DEFINES
#include <cmath&gt...
iOS Equivalent For Android Shared Preferences
I am porting an Android app to iOS, one thing I used was the Shared Preferences in Android to save each time a level was complete.
...
Can't find the 'libpq-fe.h header when trying to install pg gem
...xecute sudo apt-get install libpq-dev then bundle install and the error disappeared. Thanks
– Felo Vilches
Oct 20 '19 at 17:00
|
show 19 mor...
How long should SQL email fields be? [duplicate]
... are hundreds longer ones up to the limit of our column (255) but they are apparently fake by visual inspection.
The peak of the length distribution is at 19.
There isn't long tail. Everything falls off sharply after 38.
We cleaned up the DB by throwing away anything longer than 40. The good news ...
Start service in Android
...
it's work for my apps on android sdk 26+ but dose not on android sdk 25 or lower. there have any solution ?
– Mahidul Islam
Mar 12 '18 at 7:29
...
Xcode 4 and Core Data: How to enable SQL Debugging
I'm working on a universal iOS app and I'd like to see the raw SQL in the logs when I'm debugging. There is some info in this blog post about how to enable raw SQL logging for iOS Core Data development. The given example is for Xcode 3 and it's just not clear to me how to enable this in Xcode 4.
...
How to use UIScrollView in Storyboard
...hed it and it has a frame of 320,1000 but in order for this to work in our app we need to change the frame down to what the visible scrollview will be.
8: Add a runtime attribute with KeyPath frame with Type RECT and 0,0,320,416.
Now when we run our app we will have a visible scrollview has a fram...
How can I use speech recognition without the annoying dialog in android phones
...
Use the SpeechRecognizer interface. Your app needs to have the RECORD_AUDIO permission, and you can then create a SpeechRecognizer, give it a RecognitionListener and then call its startListening method. You will get callbacks to the listener when the speech recogniz...
ExpressJS - throw er Unhandled error event
I created expressjs application using the following commands:
32 Answers
32
...
IIS 500.19 with 0x80070005 The requested page cannot be accessed because the related configuration d
...son it cannot read the config file is because the process running your web app does not have permission to access the file/directory. So you need to give the process running your web app those permissions.
The access rights should be fairly straightforward, i.e. at least Read, and, depending on yo...