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Async/await vs BackgroundWorker
...e DoWork, RunWorkerCompleted, and ProgressChanged event handlers.
If you "converted" that to async/await, you'd do something like:
IProgress<int> progress = new Progress<int>();
progress.ProgressChanged += ( s, e ) =>
{
// TODO: do something with e.Prog...
Parsing JSON Object in Java [duplicate]
... will simply return the default value if it is not present and even try to convert value to int if it is of string type and vice-versa so Simply No null or NumberFormat exceptions at all in case of missing key or value
From docs
Get an optional string associated with a key. It returns the
de...
C++ SFINAE examples?
... No = !Yes };
};
When IsClassT<int>::Yes is evaluated, 0 cannot be converted to int int::* because int is not a class, so it can't have a member pointer. If SFINAE didn't exist, then you would get a compiler error, something like '0 cannot be converted to member pointer for non-class type in...
How do you use String.substringWithRange? (or, how do Ranges work in Swift?)
...tions return an instance of the Substring type, instead of String. Need to convert the result to a String for long-term storage. let newString = String(substring)
– phnmnn
Oct 31 '17 at 19:31
...
Return array in a function
...eturn a pointer. Furthermore, an array type in the argument list is simply converted to a pointer.
int *fillarr( int arr[] ) { // arr "decays" to type int *
return arr;
}
You can improve it by using an array references for the argument and return, which prevents the decay:
int ( &fillarr...
How to append rows to an R data frame
...m:
You should use stringsAsFactors if you want the characters to not get converted to factors. Use: df = data.frame(x = numeric(), y = character(), stringsAsFactors = FALSE)
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What's the best way to check if a file exists in C?
...y test for write permission, since the access function does not take DACLs into account. access( fname, W_OK ) may return 0 (success) because the file does not have the read-only attribute set, but you still may not have permission to write to the file.
...
How to generate a random string of a fixed length in Go?
... a slice ([]rune in Genesis, and []byte in subsequent solutions), and then converted to string. This final conversion has to make a copy of the slice's content, because string values are immutable, and if the conversion would not make a copy, it could not be guaranteed that the string's content is n...
Should I use char** argv or char* argv[]?
...It will behave as a pointer, because as explained earlier an array will be converted to a pointer when its value is read. But it should not be confused with pointers.
One classic example is the following:
char c[10];
char **c = &c; // does not work.
typedef char array[10];
array *pc = &...
How to get Bitmap from an Uri?
...
What about converting the URI to an url, e.g by using yourUri.toURL() ?
– Vidar Vestnes
Oct 7 '10 at 15:05
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