大约有 23,000 项符合查询结果（耗时：0.0286秒） [XML]
Unique fields that allow nulls in Django
...here is that the normalized "blank" value for a form CharField is an empty string, not None. So if you leave the field blank, you get an empty string, not NULL, stored in the DB. Empty strings are equal to empty strings for uniqueness checks, under both Django and database rules.
You can force the...
Linux: is there a read or recv from socket with timeout?
...econds;
tv.tv_usec = 0;
setsockopt(sockfd, SOL_SOCKET, SO_RCVTIMEO, (const char*)&tv, sizeof tv);
// WINDOWS
DWORD timeout = timeout_in_seconds * 1000;
setsockopt(socket, SOL_SOCKET, SO_RCVTIMEO, (const char*)&timeout, sizeof timeout);
// MAC OS X (identical to Linux)
struct timeval tv;
tv...
Random “Element is no longer attached to the DOM” StaleElementReferenceException
... to use a method like this with some success:
WebElement getStaleElemById(String id) {
try {
return driver.findElement(By.id(id));
} catch (StaleElementReferenceException e) {
System.out.println("Attempting to recover from StaleElementReferenceException ...");
return...
Why should C++ programmers minimize use of 'new'?
I stumbled upon Stack Overflow question Memory leak with std::string when using std::list<std::string> , and one of the comments says this:
...
how does array[100] = {0} set the entire array to 0?
How does the compiler fill values in char array[100] = {0}; ? What's the magic behind it?
4 Answers
...
PendingIntent does not send Intent extras
...
Following code should work:-
int icon = R.drawable.icon;
String message = "hello";
long when = System.currentTimeMillis();
NotificationManager notificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
Notification notification = new Notific...
Nginx no-www to www and www to no-www
...ix https:// and http://.
To check the nginx version, use nginx -v.
Strip www from url with nginx redirect
server {
server_name www.domain.com;
rewrite ^(.*) http://domain.com$1 permanent;
}
server {
server_name domain.com;
#The rest of your configuration goes here#
}
So yo...
How to display multiple notifications in android
...intent will direct to different activity..
private void sendNotification(String message,String title,JSONObject extras) throws JSONException {
String id = extras.getString("actionParam");
Log.e("gcm","id = "+id);
Intent intent = new Intent(this, OrderDetailActivty.class);
intent.pu...
How can I comment a single line in XML?
... Unfortunately, this is wrong. The spec says, For compatibility, the string " -- " (double-hyphen) MUST NOT occur within comments.
– kojiro
Jun 26 '13 at 20:01
2
...
Split comma-separated strings in a column into separate rows
...act on timings. Since R 4.0.0, the default, when creating a data.frame, is stringsAsFactors = FALSE, so as.character could be removed.
– GKi
Jun 18 at 14:23
add a comment
...