Initialising any member with () performs value initialisation. Initialising any class type with a default constructor with {} performs value initialisation. Initialising any other aggregate type (including arrays) with {} performs list initialisation, and is equivalent to initialising each of the aggregate’s members with {}. Initialising any reference type with {} constructs a temporary object, … Read more
This is a short hand only available when constructing and assigning an array. String[] array = {“a”, “b”, “c”}; You can do this though: List<String> list = Arrays.asList(“a”,”b”,”c”); As asList can take “vararg” arguments.
It’s allowed because the standard says so: C99 section 6.7.8, ยง14: An array of character type may be initialized by a character string literal, optionally enclosed in braces. Successive characters of the character string literal (including the terminating null character if there is room or if the array is of unknown size) initialize the elements … Read more
It is allowed to initialize a char array with a string if the array is at least large enough to hold all of the characters in the string besides the null terminator. This is detailed in section 6.7.9p14 of the C standard: An array of character type may be initialized by a character string literal … Read more
This is valid in C99. C99 standard supports variable sized arrays on the stack. Probably your compiler has chosen to support this construct too. Note that this is different from malloc and new. gcc allocates the array on the stack, just like it does with int array[100] by just adjusting the stack pointer. No heap … Read more
In C++14 it can be easily done with a constexpr constructor and a loop: #include <iostream> template<int N> struct A { constexpr A() : arr() { for (auto i = 0; i != N; ++i) arr[i] = i; } int arr[N]; }; int main() { constexpr auto a = A<4>(); for (auto x : a.arr) … Read more
string[,] Tablero = new string[3,3]; You can also instantiate it in the same line with array initializer syntax as follows: string[,] Tablero = new string[3, 3] {{“a”,”b”,”c”}, {“d”,”e”,”f”}, {“g”,”h”,”i”} };
scala> val arr = Array(“Hello”,”World”) arr: Array[java.lang.String] = Array(Hello, World)
These are the current declaration and initialization methods for a simple array. string[] array = new string[2]; // creates array of length 2, default values string[] array = new string[] { “A”, “B” }; // creates populated array of length 2 string[] array = { “A” , “B” }; // creates populated array of length … Read more