大约有 47,000 项符合查询结果（耗时：0.0523秒） [XML]
Hadoop “Unable to load native-hadoop library for your platform” warning
...
230
I assume you're running Hadoop on 64bit CentOS. The reason you saw that warning is the native Ha...
Add one row to pandas DataFrame
...n range(5):
>>> df.loc[i] = ['name' + str(i)] + list(randint(10, size=2))
>>> df
lib qty1 qty2
0 name0 3 3
1 name1 2 4
2 name2 2 8
3 name3 2 1
4 name4 9 6
share...
Maximum single-sell profit
...ry!), but it's helpful to see the algorithm evolve:
5 10 4 6 7
min 5 5 4 4 4
best (5,5) (5,10) (5,10) (5,10) (5,10)
Answer: (5, 10)
5 10 4 6 12
min ...
Nested JSON objects - do I have to use arrays for everything?
...
204
You don't need to use arrays.
JSON values can be arrays, objects, or primitives (numbers or st...
Static variables in member functions
...
iammilindiammilind
60.2k2727 gold badges146146 silver badges282282 bronze badges
...
How to generate random SHA1 hash to use as ID in node.js?
...
edited May 23 '17 at 12:10
Community♦
111 silver badge
answered Feb 23 '12 at 6:28
...
How to create a colored 1x1 UIImage on the iPhone dynamically?
...c image(with color: UIColor) -> UIImage {
let rect = CGRectMake(0.0, 0.0, 1.0, 1.0)
UIGraphicsBeginImageContext(rect.size)
let context = UIGraphicsGetCurrentContext()
CGContextSetFillColorWithColor(context, color.CGColor)
CGContextFillRect(context, rect)
...
HTML5 Pre-resize images before uploading
...
10 Answers
10
Active
...
How to grant remote access to MySQL for a whole subnet?
... |
edited Nov 14 '17 at 20:33
answered Jul 31 '12 at 15:01
...
How can I apply a function to every row/column of a matrix in MATLAB?
...m the columns of a matrix M. You can do this simply using sum:
M = magic(10); %# A 10-by-10 matrix
columnSums = sum(M, 1); %# A 1-by-10 vector of sums for each column
And here is how you would do this using the more complicated num2cell/cellfun option:
M = magic(10); ...