大约有 47,000 项符合查询结果（耗时：0.0817秒） [XML]
Is there shorthand for returning a default value if None in Python? [duplicate]
In C#, I can say x ?? "" , which will give me x if x is not null, and the empty string if x is null. I've found it useful for working with databases.
...
How to discard all changes made to a branch?
...ry version. I thought git checkout design would do it, but it just tells me I'm already in branch design and that I have 3 modified files.
...
Multiplication on command line terminal
I'm using a serial terminal to provide input into our lab experiment. I found that using
8 Answers
...
How to print a groupby object
... __iter__(）also works. It returns Generator yielding sequence of (name, subsetted object) for each group
– Jeremy Z
Apr 27 '18 at 5:44
...
What are some (concrete) use-cases for metaclasses?
I have a friend who likes to use metaclasses, and regularly offers them as a solution.
19 Answers
...
Guid is all 0's (zeros)?
I'm testing out some WCF services that send objects with Guids back and forth. In my web app test code, I'm doing the following:
...
Finding the mode of a list
...
It seems to me that this would run in O(n**2). Does it?
– lirtosiast
Sep 24 '15 at 4:57
7
...
Where is svn.exe in my machine?
I have Tortoise svn installed on my desktop. I want to perform some tasks using commandline svn.exe? But I am not able to find svn.exe on my machine.
...
C# Double - ToString() formatting with two decimal places but no rounding
...
-1 You can do the culture-sensitive formatting in the same string.Format step that formats the string. See my answer below.
– CesarGon
Mar 16 '10 at 11:53
1
...
Adjusting and image Size to fit a div (bootstrap)
...d1 img {
width:100%;
height: 230px;
}
jsFiddle
...per your comment, you could also just block any overflow - see this example to see an image restricted by height and cut off because it's too wide.
.top1 {
height:390px;
background-color:#FFFFFF;
margin-top:10px;
overflo...