what is the ssh address pattern like
时间: 2024-05-07 13:19:33 浏览: 61
The SSH address pattern is typically in the format of:
```
ssh [username]@[hostname or IP address]
```
For example, if the username is "john" and the hostname or IP address is "example.com", the SSH address would be:
```
ssh john@example.com
```
You would replace "john" with your username and "example.com" with the hostname or IP address of the machine you want to connect to via SSH.
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What is the symbol table
A symbol table is a data structure used by compilers and interpreters to keep track of the names (symbols) of variables, functions, classes, and other programming language constructs used in a program. The symbol table associates each symbol with its type, scope, and other attributes, making it easier for the compiler or interpreter to generate correct and efficient code. It is also used by debuggers to map machine-level instructions back to the corresponding source code lines. In short, a symbol table is a fundamental component of any programming language implementation.
what is the lambda function in CPP
In C++, a lambda function is an anonymous function that can be defined inline with the rest of your code. It allows you to create a function object on the fly, without having to define a separate function. Lambda functions can capture variables from the surrounding context and can be passed around like any other object. Here's an example of a lambda function in C++:
```
#include <iostream>
#include <vector>
#include <algorithm>
int main() {
std::vector<int> nums{3, 6, 2, 7, 1, 9};
// Sort the vector in descending order using a lambda function
std::sort(nums.begin(), nums.end(), [](int a, int b) {
return a > b;
});
// Print the sorted vector
for (int num : nums) {
std::cout << num << " ";
}
return 0;
}
```
In this example, the lambda function is used as the third argument to the `std::sort` algorithm. The function takes two integers as arguments and returns `true` if the first argument is greater than the second argument, indicating that the vector should be sorted in descending order.