大约有 15,000 项符合查询结果（耗时：0.0327秒） [XML]
How can I get Express to output nicely formatted HTML?
When using Express for Node.js, I noticed that it outputs the HTML code without any newline characters or tabs. Though it may be more efficient to download, it's not very readable during development.
...
Pandas: create two new columns in a dataframe with values calculated from a pre-existing column
...
I'd just use zip:
In [1]: from pandas import *
In [2]: def calculate(x):
...: return x*2, x*3
...:
In [3]: df = DataFrame({'a': [1,2,3], 'b': [2,3,4]})
In [4]: df
Out[4]:
a b
0 1 2
1 2 3
2 3 4
In [5]: df["A1"], df["A2"] = zip(*df["a"].map(calculate))
In [6]: df
Out[6]...
How can I obtain the element-wise logical NOT of a pandas Series?
...n error, instead you'll get a garbage mask of ints that won't work as you expect.
In[1]: df = pd.DataFrame({'A':[True, False, np.nan], 'B':[True, False, True]})
In[2]: df.dropna(inplace=True)
In[3]: df['A']
Out[3]:
0 True
1 False
Name: A, dtype object
In[4]: ~df['A']
Out[4]:
0 -2
0 -1
Name...
Get element at specified position - JavaScript
...cally I'm looking to write a function that takes two input parameters (the x and y coordinates) and returns the html element at the position on the screen represented by the parameters.
...
If vs. Switch Speed
...
The compiler can build jump tables where applicable. For example, when you use the reflector to look at the code produced, you will see that for huge switches on strings, the compiler will actually generate code that uses a hash table to dispatch these. The hash table uses the strin...
Sleep for milliseconds
I know the POSIX sleep(x) function makes the program sleep for x seconds. Is there a function to make the program sleep for x milliseconds in C++?
...
How to find if a native DLL file is compiled as x64 or x86?
I want to determine if a native assembly is complied as x64 or x86 from a managed code application ( C# ).
11 Answers
...
How to align checkboxes and their labels consistently cross-browsers
...e constantly. How do folks around Stack Overflow vertically align checkboxes and their labels consistently cross-browser ? Whenever I align them correctly in Safari (usually using vertical-align: baseline on the input ), they're completely off in Firefox and IE. Fix it in Firefox, and Saf...
How to convert SSH keypairs generated using PuTTYgen (Windows) into key-pairs used by ssh-agent and
...
puttygen supports exporting your private key to an OpenSSH compatible format. You can then use OpenSSH tools to recreate the public key.
Open PuttyGen
Click Load
Load your private key
Go to Conversions->Export OpenSSH and export your priv...
Missing return statement in a non-void method compiles
...nts after the while loop are unreachable (dead code) and would never be executed. But why doesn't the compiler even warn about returning something? Or why would a language allow us to have a non-void method having an infinite loop and not returning anything?
...