大约有 40,000 项符合查询结果（耗时：0.0688秒） [XML]
If string is empty then return some default value
...
Yes, it is bad idea to set defaults in models :) My forms will weep
– fl00r
Jan 27 '11 at 14:32
add a comment
...
MySQL: Transactions vs Locking Tables
...ft_fees();
}
$balance = $balance - $amount_being paid;
UPDATE your ACCOUNT SET BALANCE = $balance;
$balance = "GET BALANCE FROM receiver ACCOUNT"
charge_insane_transaction_fee();
$balance = $balance + $amount_being_paid
UPDATE receiver ACCOUNT SET BALANCE = $balance
Now, with no locks and no tran...
How do you list all triggers in a MySQL database?
...ENCE_OLD_ROW
ACTION_REFERENCE_NEW_ROW
CREATED
SQL_MODE
DEFINER
CHARACTER_SET_CLIENT
COLLATION_CONNECTION
DATABASE_COLLATION
share
|
improve this answer
|
follow
...
Capturing mobile phone traffic on Wireshark
...from an iOS device. See here for more details
For all phones, wi-fi only: Set up your PC as a wireless access point, then run wireshark on the PC
For all phones, wi-fi only: Get a capture device that can sniff wi-fi. This has the advantage of giving you 802.11x headers as well, but you may miss som...
Send POST data using XMLHttpRequest
..., true);
//Send the proper header information along with the request
http.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
http.onreadystatechange = function() {//Call a function when the state changes.
if(http.readyState == 4 && http.status == 200) {
aler...
Is it possible to install iOS 6 SDK on Xcode 5?
...place where it allows downloading of iOS 6 SDK, thus it is not possible to set the active SDK to iOS 6 when developing with Xcode 5. Is there a workaround that would allow Xcode 5 to install iOS 6 SDK?
...
How to Define Callbacks in Android?
...dListener {
public void onScoreSaved();
}
// ALLOWS YOU TO SET LISTENER && INVOKE THE OVERIDING METHOD
// FROM WITHIN ACTIVITY
public void setOnScoreSavedListener(OnScoreSavedListener listener) {
onScoreSavedListener = listener;
}
// DECLARED IN ACTIVIT...
iOS change navigation bar title font and color
...e the title font (and color) is:
[self.navigationController.navigationBar setTitleTextAttributes:
@{NSForegroundColorAttributeName:[UIColor redColor],
NSFontAttributeName:[UIFont fontWithName:@"mplus-1c-regular" size:21]}];
Edit: Swift 4.2
self.navigationController?.navigationBar.titleTextAttri...
Inject errors into already validated form?
...ting list:
from django.forms.utils import ErrorList
errors = form._errors.setdefault("myfield", ErrorList())
errors.append(u"My error here")
And if you want to add non-field errors, use django.forms.forms.NON_FIELD_ERRORS (defaults to "__all__") instead of "myfield".
...
Latex Remove Spaces Between Items in List
...t to remove the spacing globally for every list in your document just put \setlist[itemize]{noitemsep} in your preamble.
– Fabian Winkler
Mar 13 '13 at 15:52
...