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Should a function have only one return statement?
...evitably wind up with code that looks like this:
function()
{
HRESULT error = S_OK;
if(SUCCEEDED(Operation1()))
{
if(SUCCEEDED(Operation2()))
{
if(SUCCEEDED(Operation3()))
{
if(SUCCEEDED(Operation4()))
{
...
How to check if a file exists in Documents folder?
...th: method. It's often better to just try to open a file and deal with the error if the file does not exist.
NSFileManager Class Reference
Note: Attempting to predicate behavior based on the current state of the file system or a particular file on the file system is not recommended. Doing so can ca...
Why does this C++ snippet compile (non-void function does not return a value) [duplicate]
...function. [...]
This means that the compiler is not obligated provide an error nor a warning usually because it can be difficult to diagnose in all cases. We can see this from the definition of undefined behavior in the draft standard in section 1.3.24 which says:
[...]Permissible undefined be...
Unknown column in 'field list' error on MySQL Update query
I keep getting MySQL error #1054, when trying to perform this update query:
11 Answers
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Error Dropping Database (Can't rmdir '.test\', errno: 17)
...hereby making it not possible to remove the directory.
MySQL displays an error message when it cannot remove the directory
you can really drop the database manually by removing any remaining files in the database directory and then the directory itself.
...
Accessing an SQLite Database in Swift
...?
guard sqlite3_open(fileURL.path, &db) == SQLITE_OK else {
print("error opening database")
sqlite3_close(db)
db = nil
return
}
Note, I know it seems weird to close the database upon failure to open, but the sqlite3_open documentation makes it explicit that we must do so to avo...
How to tell if a file is git tracked (by shell exit code)?
...
try:
git ls-files --error-unmatch <file name>
will exit with 1 if file is not tracked
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tinyxml XML解析库下载（tinyxml2.h 和 tinyxml2.cpp） - 源码下载 - 清泛...
...Unknown& operator=( const XMLUnknown& ); // not supported
};
enum XMLError {
XML_NO_ERROR = 0,
XML_SUCCESS = 0,
XML_NO_ATTRIBUTE,
XML_WRONG_ATTRIBUTE_TYPE,
XML_ERROR_FILE_NOT_FOUND,
XML_ERROR_FILE_COULD_NOT_BE_OPENED,
XML_ERROR_FILE_READ_ERROR,
XML_E...
“did you run git update-server-info” error on a Github repository
...b Gui from their website to manage my repos, and I'm getting the following error:
20 Answers
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Understanding REST: Verbs, error codes, and authentication
...s, just like when you request a static web page.
Point 3: How to return error messages and codes
Consider the 4xx or 5xx HTTP status codes as error categories. You can elaborate the error in the body.
Failed to Connect to Database: / Incorrect Database Login: In general you should use a 500 er...