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How do I implement an Objective-C singleton that is compatible with ARC?
.../function. Every separate run through the +sharedInstance method (even on different threads) will 'see' the same sharedInstance variable.
– Nick Forge
Aug 3 '12 at 4:08
9
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Tick symbol in HTML/XHTML
...first symbol here, ☐ / 0x2610. This is an empty (unchecked) checkbox, so if you see a box, that's the way it's supposed to look. It's the counterpart to ☑ / 0x2611, which is the checked version.
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Merge / convert multiple PDF files into one PDF
...no other pdf exists in that directory and their order is preserved by "*". If its not preserved, using ranges: filename_{0..9}.pdf solves it.
– lepe
Jan 5 '15 at 5:48
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JsonMappingException: No suitable constructor found for type [simple type, class ]: can not instanti
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If you don't want to add default constructor (e.g., when you are dealing with immutable objects). You will have to tell which constructor or factory method to use to instantiate the object using JsonCreator annotation.
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Can table columns with a Foreign Key be NULL?
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@CJDennis If you make it so that only one row can have a null ID, it could be used as fallback values for other rows. (Though it might work out better for the DB if you just use more columns.) The default constraint seems like a proble...
What is a good Java library to zip/unzip files? [closed]
...word";
try {
ZipFile zipFile = new ZipFile(source);
if (zipFile.isEncrypted()) {
zipFile.setPassword(password);
}
zipFile.extractAll(destination);
} catch (ZipException e) {
e.printStackTrace();
}
}
The Maven dependency is:
<...
Socket 错误返回码详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
... 10035 - Resource temporarily unavailable
Socket error 10036 - Operation now in progress
Socket error 10037 - Operation already in progress
Socket error 10038 - Socket operation on non-socket
Socket error 10039 - Destination address required
Socket error 10040 - Message too long
Socket e...
Uint8Array to string in Javascript
...tEncoder/TextDecoder APIs in v11, so no need to install any extra packages if you only target current Node versions.
– Loilo
Sep 26 '19 at 15:38
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Why do I get “unresolved external symbol” errors when using templates? [duplicate]
...ed function. When it comes to compile the template's source file, the specific template type that is being used in the program source isn't used there so it still won't generate the code required for the function. This results in the unresolved external symbol.
The solutions available for this ar...
How to detect the OS from a Bash script?
...se them between all the computers I use. The problem is I have some OS specific aliases so I was looking for a way to determine if the script is running on Mac OS X, Linux or Cygwin .
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