Arrays

Arrays are discussed as data types but, more specifically they are data structures that are dependent on other data types. Arrays refer to groups of values of the same type. Arrays help in storing these values together and ease the process of iterating, sorting, and searching for individuals or subsets of elements within this group. Solidity provides rich array constructs that cater to different needs.

An example of an array in Solidity is as follows:

uint[5] intArray ;

Arrays in Solidity can be fixed or dynamic.

Fixed arrays

Fixed arrays refer to arrays that have a pre-determined size mentioned at declaration. Examples of fixed arrays are as follows:

int[5] age ; // array of int with 5 fixed storage space allocated
byte[4] flags ; // array of byte with 4 fixed storage space allocated

Fixed arrays cannot be initialized using the new keyword. They can only be initialized inline, as shown in the following code:

int[5] age = [int(10), 20,30,40,50] ;

They can also be initialized inline within...