大约有 22,000 项符合查询结果（耗时：0.0228秒） [XML]
Dictionary vs Object - which is more efficient and why?
...RESULT=None
def makeL(i):
# Use this line to negate the effect of the strings on the test
# return "Python is smart and will only create one string with this line"
# Use this if you want to see the difference with 5 million unique strings
return "This is a sample string %s" % i
d...
How to find all serial devices (ttyS, ttyUSB, ..) on Linux without opening them?
...s.h>
#include <sys/stat.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <termios.h>
#include <sys/ioctl.h>
#include <linux/serial.h>
#include <iostream>
#include <list>
using namespace std;
static string get_driver(co...
Where do “pure virtual function call” crashes come from?
...
This can be triggered with MSVC if you add an extra level of indirection: have Base::Base call a non-virtual f() which in turn calls the (pure) virtual doIt method.
– Frerich Raabe
Mar 5 '14 at 14:20
...
How to split a file into equal parts, without breaking individual lines? [duplicate]
...
var dict = File.ReadLines("test.txt")
.Where(line => !string.IsNullOrWhitespace(line))
.Select(line => line.Split(new char[] { '=' }, 2, 0))
.ToDictionary(parts => parts[0], parts => parts[1]);
or
enter code here
line="to=xxx@gmail...
How can I clear or empty a StringBuilder? [duplicate]
I'm using a StringBuilder in a loop and every x iterations I want to empty it and start with an empty StringBuilder , but I can't see any method similar to the .NET StringBuilder.Clear in the documentation, just the delete method which seems overly complicated.
...
How do I pass an object from one activity to another on Android? [duplicate]
...stead of simply putting the Parcelable object directly via Intent.putExtra(String name,Parcelable value) and then retrieving via Intent.getParcelableExtra(String name)?
– Tony Chan
Aug 2 '13 at 22:57
...
Measuring execution time of a function in C++
...usage:
#include <iostream>
#include <algorithm>
typedef std::string String;
//first test function doing something
int countCharInString(String s, char delim){
int count=0;
String::size_type pos = s.find_first_of(delim);
while ((pos = s.find_first_of(delim, pos)) != String:...
convert a list of objects from one type to another using lambda expression
....
List<char> c = new List<char>() { 'A', 'B', 'C' };
List<string> s = c.Select(x => x.ToString()).ToList();
share
|
improve this answer
|
follow
...
与复制构造函数相关的错误.例如:0x77D9FCAA (ntdll.dll) (prog31.exe 中)处...
...含指针成员，没有复制构造函数出错
struct Node
{
Node(char *n="",int a = 0)
{
name = strdup(n);
strcpy(name,n);
age = a ;
}
~Node()
{
delete[] name;
}
char *name;
int age;
};
int main()
{
Node node1("Roger",20),node2(node1);
//pri...
Determine a string's encoding in C#
Is there any way to determine a string's encoding in C#?
9 Answers
9
...