大约有 47,000 项符合查询结果（耗时：0.0356秒） [XML]
What does the C++ standard state the size of int, long type to be?
...s the number of bits in a byte. In all but the most obscure platforms it's 8, and it can't be less than 8.
One additional constraint for char is that its size is always 1 byte, or CHAR_BIT bits (hence the name). This is stated explicitly in the standard.
The C standard is a normative reference for t...
Pass a data.frame column name to a function
...
ShaneShane
89.7k3131 gold badges215215 silver badges215215 bronze badges
...
Memoization in Haskell?
...fficiently the following function in Haskell, for large numbers (n > 108)
8 Answers
...
Selecting with complex criteria from pandas.DataFrame
...>>> df
A B C
0 9 40 300
1 9 70 700
2 5 70 900
3 8 80 900
4 7 50 200
5 9 30 900
6 2 80 700
7 2 80 400
8 5 80 300
9 7 70 800
We can apply column operations and get boolean Series objects:
>>> df["B"] > 50
0 False
1 True
2 True
3 ...
Annotating text on individual facet in ggplot2
...ta.frame(mpg = 15,wt = 5,lab = "Text",
cyl = factor(8,levels = c("4","6","8")))
p + geom_text(data = ann_text,label = "Text")
It should work without specifying the factor variable completely, but will probably throw some warnings:
...
Fastest way to iterate over all the chars in a String
...
8 Answers
8
Active
...
How do you rotate a two dimensional array?
...re it is in C#
int[,] array = new int[4,4] {
{ 1,2,3,4 },
{ 5,6,7,8 },
{ 9,0,1,2 },
{ 3,4,5,6 }
};
int[,] rotated = RotateMatrix(array, 4);
static int[,] RotateMatrix(int[,] matrix, int n) {
int[,] ret = new int[n, n];
for (int i = 0; i < n; ++i) {
for (int j =...
What does curly brackets in the `var { … } = …` statements do?
...
answered Mar 8 '13 at 10:09
BlenderBlender
245k4343 gold badges378378 silver badges444444 bronze badges
...
Batch script: how to check for admin rights
...
481
Issues
blak3r / Rushyo's solution works fine for everything except Windows 8. Running AT on Wi...