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How to detect unused methods and #import in Objective-C
... approach is just to comment out import statements until you get a compile error/warning.
Unused Objective-C methods are much more difficult to detect than unused C functions because messages are dispatched dynamically. A warning or error can tell you that you have a potential problem, but the lack...
MQTT物联网协议完全实践指南 · App Inventor 2 中文网
...设置"
// 自动重连和错误恢复
when UrsPahoMqttClient1.ConnectionError errorMessage
do
set Label_ConnectionStatus.Text to "连接错误: " & errorMessage
set Label_ConnectionStatus.TextColor to Red
// 记录错误日志
call logError "MQTT连接错误", errorMessage
//...
Node.js check if path is file or directory
...)
stats.isFIFO()
stats.isSocket()
NOTE:
The above solution will throw an Error if; for ex, the file or directory doesn't exist.
If you want a true or false approach, try fs.existsSync(dirPath) && fs.lstatSync(dirPath).isDirectory(); as mentioned by Joseph in the comments below.
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How do I set the time zone of MySQL?
...
I set +00:00, but I get this error: error: Found option without preceding group in config file: /etc/my.cnf
– János
May 9 '14 at 17:19
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What does “Could not find or load main class” mean?
...new Java developers experience is that their programs fail to run with the error message: Could not find or load main class ...
...
How to declare strings in C [duplicate]
...declaring an array of size 5 and initializing it with "String". This is an error be cause "String" don't fit in 5 elements.
char p3[7] = "String"; is the correct declaration ('\0' is the terminating character in c strings).
http://c-faq.com/~scs/cclass/notes/sx8.html
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Python's many ways of string formatting — are the older ones (going to be) deprecated?
...described here exhibit a variety of quirks that lead to a number of common errors (such as failing to display tuples and dictionaries correctly). Using the newer formatted string literals or the str.format interface helps avoid these errors. These alternatives also provide more powerful, flexible an...
Android SDK manager won't open
...nning Windows 8). I tried running tools/android.bat and noticed I got some errors there. I investigated further and it seems there is something wrong in the code that finds your Java path.
This is how you fix it:
Open up tools/android.bat in your favorite text editor
Search for this piece of code...
MySQL: Transactions vs Locking Tables
... $50 you should have ended up with ($100 - $20 - $30). In this case, "bank error in your favor".
Now, let's say you use locks. Your bill payment ($20) hits the pipe first, so it wins and locks your account record. Now you've got exclusive use, and can deduct the $20 from the balance, and write the ...
WARNING: Can't verify CSRF token authenticity rails
I am sending data from view to controller with AJAXand I got this error:
17 Answers
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