大约有 15,100 项符合查询结果（耗时：0.0252秒） [XML]
What's the use/meaning of the @ character in variable names in C#?
...# (where in the past it would have been PHP)
– Wasted_Coder
Mar 5 '16 at 19:36
...
How do I get the object if it exists, or None if it does not exist?
... go = None
What I did do, is to subclass models.Manager, create a safe_get like the code above and use that manager for my models. That way you can write: SomeModel.objects.safe_get(foo='bar').
share
|
...
Pandas: drop a level from a multi-level column index?
...
You can use MultiIndex.droplevel:
>>> cols = pd.MultiIndex.from_tuples([("a", "b"), ("a", "c")])
>>> df = pd.DataFrame([[1,2], [3,4]], columns=cols)
>>> df
a
b c
0 1 2
1 3 4
[2 rows x 2 columns]
>>> df.columns = df.columns.droplevel()
>>>...
How do I get the key at a specific index from a Dictionary in Swift?
...
Doesn't work... 'NSDictionary' is not convertible to '_ArrayBuffer<T>'
– Chris
Mar 7 '15 at 19:12
|
show 6 more c...
Efficient SQL test query or validation query that will work across all (or most) databases
...himpsky)
PostgreSQL
SQLite
SELECT 1 FROM DUAL
Oracle
SELECT 1 FROM any_existing_table WHERE 1=0
or
SELECT 1 FROM INFORMATION_SCHEMA.SYSTEM_USERS
or
CALL NOW()
HSQLDB (tested with version 1.8.0.10)
Note: I tried using a WHERE 1=0 clause on the second query, but it didn't work as a value for Ap...
How do I create a unique ID in Java? [duplicate]
...,'L','M','N','O','P','Q','R','S','T','U','V','W','X','Y','Z',
'-','.','_','~'
};
}
share
|
improve this answer
|
follow
|
...
Converting a JS object to an array using jQuery
...r on the www i see lacks the conversion of keys.
– TD_Nijboer
Apr 9 '14 at 11:59
55
You can also ...
What's the difference between array_merge and array + array?
...ce is:
The + operator takes the union of the two arrays, whereas the array_merge function takes the union BUT the duplicate keys are overwritten.
share
|
improve this answer
|
...
Can I change the color of auto detected links on UITextView?
...er won't.
If you want to set appearance for whole application, application(_:didFinishLaunchingWithOptions:) is good place for calling such code.
share
|
improve this answer
|
...
Detecting when user has dismissed the soft keyboard
...int keyCode, KeyEvent event) {
if (event.getKeyCode() == KeyEvent.KEYCODE_BACK) {
// Do your thing.
return true; // So it is not propagated.
}
return super.dispatchKeyEvent(event);
}
Here is a link on how to use your custom views (for when you subclass EditText):
http://developer.an...