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JavaScript pattern for multiple constructors
... b= 'some default value';
if (typeof(a)==='string')
this._constructInSomeWay(a, b);
else if (a instanceof MyType)
this._constructInSomeOtherWay(a, b);
}
You can also access arguments as an array-like to get any further arguments passed in.
If you need more complex ar...
Run an Application in GDB Until an Exception Occurs
...case of GNU C++, exceptions are raised by calling a library function named __raise_exception which has the following ANSI C interface:
/* addr is where the exception identifier is stored.
id is the exception identifier. */
void __raise_exception (void **addr, void *id);
To make the debugger c...
php stdClass to array
...g functions). "But I already did this" you say. Not exactly - you used json_decode on the array, but you need to encode it with json_encode first.
Requirements
The json_encode and json_decode methods. These are automatically bundled in PHP 5.2.0 and up. If you use any older version there's also a ...
What's the bad magic number error?
...
Perhaps you need 'rm __pycache__/*pyc' now, because the pyc files are now in that folder.
– Arpad Horvath
Jun 2 '16 at 17:30
1...
What does = +_ mean in JavaScript
I was wondering what the = +_ operator means in JavaScript. It looks like it does assignments.
12 Answers
...
How do I expire a PHP session after 30 minutes?
...a session timeout of your own. Both options mentioned by others (session.gc_maxlifetime and session.cookie_lifetime) are not reliable. I'll explain the reasons for that.
First:
session.gc_maxlifetime
session.gc_maxlifetime specifies the number of seconds after which data will be seen as 'garb...
Discuz! X3 论坛标题字数突破80的限制 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...，修改语言包文件。
修改的文件一览如下（数据库修改 _forum_post, _forum_rsscache, _forum_thread 这三张表）：
下面详细介绍如何修改：
一、数据库修改，修改数据库标题字段的长度为255字符：运行下面的sql语句：
（注意修改...
Reload django object from database
...
As of Django 1.8 refreshing objects is built in. Link to docs.
def test_update_result(self):
obj = MyModel.objects.create(val=1)
MyModel.objects.filter(pk=obj.pk).update(val=F('val') + 1)
# At this point obj.val is still 1, but the value in the database
# was updated to 2. The ob...
How do I write a short literal in C++?
....0;
c = (short)2;
d = '\2';
Compile -> disassemble ->
movl $2, _a
movl $2, _b
movl $2, _c
movl $2, _d
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android: move a view on touch move (ACTION_MOVE)
...ss MyActivity extends Activity implements View.OnTouchListener {
TextView _view;
ViewGroup _root;
private int _xDelta;
private int _yDelta;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
_root = (ViewGroup...