countUntil to print all the index of a given string.

[Vino via Digitalmars-d-learn]

Hi All,

  Request your help on printing the all index of an array element 
, eg; the below code prints the index of the string "Test2" as 
[1], but the string "Test2" is present 2 times at  index  1 and 
4, so how do I print all the index of a given string.

import std.stdio;
import std.container;
import std.algorithm;

void main () {
auto a = Array!string("Test1", "Test2", "Test3", "Test1", 
"Test2");
writeln(SList!int(a[].countUntil("Test2"))[]);
}

Output
[1]

Expected
[1, 4]

From,
Vino.B