Basic dynamic array question. Use of new versus no new.

[Kapps via Digitalmars-d-learn]

On Wednesday, 11 June 2014 at 02:30:01 UTC, WhatMeWorry wrote:
> In Mr. Cehreli's book it says
>
> Additionally, the length of dynamic arrays can be changed by 
> assigning a value to this property:
>
> int[] array; // initially empty
> array.length = 5; // now has 5 elements
>
> while in Mr. Alexandrescu's book, it says
>
> To create a dynamic array, use a new expression (§ 2.3.6.1 on 
> page 51) as follows:
>
> int[] array = new int[20]; // Create an array of 20 integers
>
>
> Could someone please compare and contrast the two syntaxes. I 
> presume the "new" command places the 2nd array in heap memory.

They both do the same, create an array of n integers on the heap 
and set the length to n. You can also use .capacity instead of 
.length to allocate n but not adjust length.