Insert a char in string

[John Colvin via Digitalmars-d-learn]

On Thursday, 10 July 2014 at 16:05:51 UTC, Alexandre wrote:
> I have a string X and I need to insert a char in that string...
>
> auto X = "100000000000000";
>
> And I need to inser a ',' in position 3 of this string..., I 
> try to use the array.insertInPlace, but, not work...
>
> I try this:
> auto X = "100000000000000";
> auto N = X.insertInPlace(1,'0');

insertInPlace works like this:

auto X = "100000000000000";
auto X1 = X;
X.insertInPlace(3, ',');
assert(X == "100,000000000000");
assert(X1 == "100000000000000");


You can also do this:

auto X = "100000000000000";
auto N = X[0 .. 3] ~ ',' ~ X[3 .. $];
assert(X == "100000000000000");
assert(N == "100,000000000000");