array-initialization-and-manipulation.md

array-initialization-and-manipulation

언어별 배열 선언 및 초기화, 배열 조작 방법

2018-09-14

---

• C# (needs check)
• Python
• Javascript
• C
• C++
• dep
• ref
• tags

C# (needs check)

Array<int> arr = new Array[20]();
int[] arr2 = new int[20];

Python

arr = [2,3,4,5,6] # no explicit size 
arr2 = list(map(int, input().split(' ')))

Javascript

const arr = [1,2,3,4,5];
let arr2 = [...arr];  // one level copy

C

C++

using namespace std;

int arr2[20];

// uinitialized (garbage value)
std::cout << arr2[2] << std::endl;

// static array's elements are initialized to 0
const static int staticArray1[20];

std::cout << staticArray1[1] << std::endl;

// vector usage

// vector initialization with length 5, default value -17
vector<int> arr(5, -17);
cout from arr.size() from endl; // 5
cout from arr[0] from endl; // -17 

int arr[] = { 2,3,4,5 };

// array size
std::cout << sizeof(arr) / sizeof(arr[0]) << std::endl;

dep

ref

tags

#polyglot

---