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How to prevent multiple instances of an Activity when it is launched with different Intents
...new App());
if(!IsTaskRoot) {
Intent intent = Intent;
string action = intent.Action;
if(intent.HasCategory(Intent.CategoryLauncher) && action != null && action.Equals(Intent.ActionMain, System.StringComparison.OrdinalIgnoreCase)) {
System.Cons...
How does functools partial do what it does?
...e code more readable. re.search method's signature is:
search(pattern, string, flags=0)
By applying partial we can create multiple versions of the regular expression search to suit our requirements, so for example:
is_spaced_apart = partial(re.search, '[a-zA-Z]\s\=')
is_grouped_together = ...
Declaring variables inside loops, good practice or bad practice?
...
@BillyONeal: For string and vector specifically, the assignment operator can reuse the allocated buffer each loop, which (depending on your loop) may be a huge time savings.
– Mooing Duck
Jan 9 '18 at 22...
How can I delete the current line in Emacs?
...u prefer delete instead of kill, you can use the
code below.
For point-to-string operation (kill/delete) I recommend to use zop-to-char
(defun aza-delete-line ()
"Delete from current position to end of line without pushing to `kill-ring'."
(interactive)
(delete-region (point) (line-end-posit...
How to create a tuple with only one element
... would expect all the elements to be tuples, why is a tuple converted to a string when it only contains a single string?
3 ...
What's the best way to share data between activities?
...in the intent's extras or saving it somewhere else. If data is primitives, Strings or user-defined objects: send it as part of the intent extras (user-defined objects must implement Parcelable). If passing complex objects save an instance in a singleton somewhere else and access them from the launch...
“:” (colon) in C struct - what does it mean? [duplicate]
... struct
{
short a : 4;
short b : 3;
} test2;
struct
{
char a : 4;
char b : 3;
} test3;
struct
{
char a : 4;
short b : 3;
} test4;
printf("test1: %d\ntest2: %d\ntest3: %d\ntest4: %d\n", sizeof(test1), sizeof(test2), sizeof(test3), sizeof(test4));
test...
What is the argument for printf that formats a long?
... Yep Dr Beco; further, just %l triggers warning: unknown conversion type character 0x20 in format [-Wformat]
– Patrizio Bertoni
Jul 29 '15 at 10:53
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Create objective-c class instance by name?
...
id object = [[NSClassFromString(@"NameofClass") alloc] init];
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How to reuse an ostringstream?
I'd like to clear out and reuse an ostringstream (and the underlying buffer) so that my app doesn't have to do as many allocations. How do I reset the object to its initial state?
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