大约有 4,760 项符合查询结果（耗时：0.0328秒） [XML]
Base64 length calculation?
...2(64) = 6).
Therefore 4 chars are used to represent 4 * 6 = 24 bits = 3 bytes.
So you need 4*(n/3) chars to represent n bytes, and this needs to be rounded up to a multiple of 4.
The number of unused padding chars resulting from the rounding up to a multiple of 4 will obviously be 0, 1, 2 or 3....
C# operator overload for `+=`?
I am trying to do operator overloads for += , but I can't. I can only make an operator overload for + .
10 Answers
...
Returning the product of a list
Is there a more concise, efficient or simply pythonic way to do the following?
14 Answers
...
Understanding the map function
Apply function to every item of iterable and return a list of the results. If additional iterable arguments are passed, function must take that many arguments and is applied to the items from all iterables in parallel.
...
The difference between bracket [ ] and double bracket [[ ]] for accessing the elements of a list or
...
The R Language Definition is handy for answering these types of questions:
http://cran.r-project.org/doc/manuals/R-lang.html#Indexing
R has three basic indexing operators, with syntax displayed by the following examples
x[i]
x[i, j]
x[[i]...
How to remove outliers from a dataset
I've got some multivariate data of beauty vs ages. The ages range from 20-40 at intervals of 2 (20, 22, 24....40), and for each record of data, they are given an age and a beauty rating from 1-5. When I do boxplots of this data (ages across the X-axis, beauty ratings across the Y-axis), there are so...
Show AlertDialog in any position of the screen
...an AlertDialog in android it shows in the center of the screen. Is there any way to change the position?
4 Answers
...
How can I get zoom functionality for images?
Is there a common way to show a big image and enable the user to zoom in and out and pan the image?
13 Answers
...
rsync: how can I configure it to create target directory on server?
I would like to rsync from local computer to server. On a directory that does not exist, and I want rsync to create that directory on the server first.
...
How do I clear/delete the current line in terminal?
If I'm using terminal and typing in a line of text for a command, is there a hotkey or any way to clear/delete that line?
1...