Re: Sum and other algorithm functions
On Thursday, 10 September 2015 at 13:48:16 UTC, Namal wrote:
Hello,
how can I define the range for the sum function which I want to
sum up? For instance how do I sum up the first 3 elements of an
array
int[] a = [1,2,3,4,5,6,7,8,9];
or the last 3?
In this case, you can simply slice array using a[0..3] or
a[$-3..$].
If you have a range you can use take() and/or drop()
void main()
{
int[] a = [1,2,3,4,5,6];
writeln(a[0..3]);
writeln(a[$-3..$]);
writeln(a.take(3));
writeln(a.drop(a.length-3));
}
Re: Sum and other algorithm functions
On Thursday 10 September 2015 15:48, Namal wrote: > Hello, > > how can I define the range for the sum function which I want to > sum up? For instance how do I sum up the first 3 elements of an > array > > int[] a = [1,2,3,4,5,6,7,8,9]; > > or the last 3? First you slice the first/last 3, then you sum them. first 3: a[0 .. 3].sum last 3: a[$ - 3 .. $].sum
Sum and other algorithm functions
Hello, how can I define the range for the sum function which I want to sum up? For instance how do I sum up the first 3 elements of an array int[] a = [1,2,3,4,5,6,7,8,9]; or the last 3?
