大约有 40,000 项符合查询结果（耗时：0.0418秒） [XML]
Return all enumerables with yield return at once; without looping through
...numeration, making it possible to do things like...
public IEnumerable<string> ConcatLists(params IEnumerable<string>[] lists)
{
foreach (IEnumerable<string> list in lists)
{
foreach (string s in list)
{
yield return s;
}
}
}
...
Getting distance between two points based on latitude/longitude
...nit.MILES)
>> 243.71201856934454 # in miles
# you can also use the string abbreviation for units:
haversine(lyon, paris, unit='mi')
>> 243.71201856934454 # in miles
haversine(lyon, paris, unit=Unit.NAUTICAL_MILES)
>> 211.78037755311516 # in nautical miles
They claim to have ...
How to print the full traceback without halting the program?
..._error
RuntimeError: something bad happened!
Or perhaps you just want the string, in which case, you'll want the traceback.format_exc function instead:
try:
do_something_that_might_error()
except Exception as error:
logger.debug(traceback.format_exc())
Which logs:
DEBUG:__main__:Traceback ...
Django template how to look up a dictionary value with a variable
...mita's answer, the dictionary passed into the function is in the form of a string, so perhaps use ast.literal_eval to convert the string to a dictionary first, like in this example.
With this edit, the code should look like this:
# code for custom template tag
@register.filter(name='lookup')
def loo...
PHP Redirect with POST data
...
/**
* Redirect with POST data.
*
* @param string $url URL.
* @param array $post_data POST data. Example: array('foo' => 'var', 'id' => 123)
* @param array $headers Optional. Extra headers to send.
*/
public function redirect_post($url, array $data, array $he...
Java: Date from unix timestamp
...
Instant instant = Instant.ofEpochSecond( 1_280_512_800L );
instant.toString(): 2010-07-30T18:00:00Z
See that code run live at IdeOne.com.
Asia/Kabul or Asia/Tehran time zones ?
You reported getting a time-of-day value of 22:30 instead of the 18:00 seen here. I suspect your PHP utility is...
How to generate a core dump in Linux on a segmentation fault?
...oid);
static void cleanup(void);
void init_signals(void);
void panic(const char *, ...);
struct sigaction sigact;
char *progname;
int main(int argc, char **argv) {
char *s;
progname = *(argv);
atexit(cleanup);
init_signals();
printf("About to seg fault by assigning zero to *s\n...
Accessing an SQLite Database in Swift
...autoincrement, name text)", nil, nil, nil) != SQLITE_OK {
let errmsg = String(cString: sqlite3_errmsg(db)!)
print("error creating table: \(errmsg)")
}
Use sqlite3_prepare_v2 to prepare SQL with ? placeholder to which we'll bind value.
var statement: OpaquePointer?
if sqlite3_prepare_v2(db...
Start an Activity with a parameter
...ust" use the package name to prefix your keys.) Simply use intent.putExtra(String, Int).
– Sam
Oct 27 '12 at 19:32
1
...
Android: install .apk programmatically [duplicate]
...
I solved the problem. I made mistake in setData(Uri) and setType(String).
Intent intent = new Intent(Intent.ACTION_VIEW);
intent.setDataAndType(Uri.fromFile(new File(Environment.getExternalStorageDirectory() + "/download/" + "app.apk")), "application/vnd.android.package-archive");
intent....