大约有 13,906 项符合查询结果（耗时：0.0240秒） [XML]
How can I print literal curly-brace characters in python string and also use .format on it?
...
You need to double the {{ and }}:
>>> x = " {{ Hello }} {0} "
>>> print(x.format(42))
' { Hello } 42 '
Here's the relevant part of the Python documentation for format string syntax:
Format strings contain “replacement fields” surrounded by curl...
return, return None, and no return at all?
... taught they should be used), but they are not absolute rules so you can mix them up if you feel necessary to.
Using return None
This tells that the function is indeed meant to return a value for later use, and in this case it returns None. This value None can then be used elsewhere. return None i...
Take the content of a list and append it to another list
...
You probably want
list2.extend(list1)
instead of
list2.append(list1)
Here's the difference:
>>> a = range(5)
>>> b = range(3)
>>> c = range(2)
>>> b.append(a)
>>> b
[0, 1, 2, [0, 1, 2, 3, 4]]
>>...
Create tap-able “links” in the NSAttributedString of a UILabel?
...
1
2
Next
215
...
Compare if two variables reference the same object in python
...
That’s what is is for: x is y returns True if x and y are the same object.
share
|
improve this answer
|
follow
...
Why should we typedef a struct so often in C?
...t provides a smidgen more abstraction.
Stuff like
typedef struct {
int x, y;
} Point;
Point point_new(int x, int y)
{
Point a;
a.x = x;
a.y = y;
return a;
}
becomes cleaner when you don't need to see the "struct" keyword all over the place, it looks more as if there really is a type c...
Anonymous recursive PHP functions
...I can finally loop through nested structures in layouts without having to explicitly define a method and keep all my layout data out of my classes.
– Dieter Gribnitz
Feb 26 '14 at 10:14
...
Best way to check for nullable bool in a condition expression (if …)
I was wondering what was the most clean and understandable syntax for doing condition checks on nullable bools.
12 Answers...
How to return a result from a VBA function
...like this:
Public Function test() As Integer
test = 1
End Function
Example usage:
Dim i As Integer
i = test()
If the function returns an Object type, then you must use the Set keyword like this:
Public Function testRange() As Range
Set testRange = Range("A1")
End Function
Example us...
How to make an AJAX call without jQuery?
How to make an AJAX call using JavaScript, without using jQuery?
23 Answers
23
...