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C#位运算符（C#按位与、按位或 等） - 更多技术 - 清泛网 - 专注C/C++及内核技术
...型，数组长度为20。
然后可用NAME 说明变量，如： NAME a1,a2,s1,s2;完全等效于： char a1[20],a2[20],s1[20],s2[20]
又如：
typedef struct stu{
char name[20];
int age;
char sex;
} STU;
定义STU表示stu的结构类型，然后可用STU来说明结构变...
Detecting arrow key presses in JavaScript
...
answered Apr 8 '11 at 15:13
Mark KahnMark Kahn
76.8k2525 gold badges153153 silver badges209209 bronze badges
...
Package objects
...
// Define implicits needed to effectively use your API:
implicit def a2b(a: A): B = // ...
}
Now the definitions inside that package object are available inside the whole package foo.bar. Furthermore the definitions get imported when someone outside of that package imports foo.bar._.
This ...
How to add text inside the doughnut chart using Chart.js?
...[300, 50, 100],
backgroundColor: [
"#FF6384",
"#36A2EB",
"#FFCE56"
],
hoverBackgroundColor: [
"#FF6384",
"#36A2EB",
"#FFCE56"
]
}]
};
Chart.pluginService.register({
beforeDraw: function(chart) {
var wi...
How can I test a Windows DLL file to determine if it is 32 bit or 64 bit? [duplicate]
...ode(EXE);
if (read(EXE, $doshdr, 64)) {
($magic,$skip,$offset)=unpack('a2a58l', $doshdr);
die("Not an executable") if ($magic ne 'MZ');
seek(EXE,$offset,SEEK_SET);
if (read(EXE, $pehdr, 6)){
($sig,$skip,$machine)=unpack('a2a2v', $pehdr);
die("No a PE Executable") if ($sig...
Hash function that produces short hashes?
... message".encode("UTF-8")).hexdigest()
>>> hash
'104ab42f1193c336aa2cf08a2c946d5c6fd0fcdb'
>>> hash[:10]
'104ab42f11'
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T-SQL query to show table definition?
...
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edited Jun 2 '11 at 14:25
answered Jun 2 '11 at 14:18
...
How to convert floats to human-readable fractions?
...allowed
**
** based on the theory of continued fractions
** if x = a1 + 1/(a2 + 1/(a3 + 1/(a4 + ...)))
** then best approximation is found by truncating this series
** (with some adjustments in the last term).
**
** Note the fraction can be recovered as the first column of the matrix
** ( a1 1 ) ( ...
How can we make xkcd style graphs?
... answered Dec 24 '14 at 7:24
d2a2dd2a2d
1,0061010 silver badges1212 bronze badges
...
Extract a substring according to a pattern
...read.dcf(textConnection(string)))
## [1] "E001" "E002" "E003"
7) separate
7a) Using tidyr::separate we create a data frame with two columns, one for the part before the colon and one for after, and then extract the latter.
library(dplyr)
library(tidyr)
library(purrr)
DF <- data.frame(string)
DF...