Insert a char in string

[simendsjo via Digitalmars-d-learn]

On 07/10/2014 06:05 PM, 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');

Do you really want to insert a comma in the string, or do you want to
format a number as "100,000,000,000.00"?