#include... nsACString str = "Hello World!"; str.SetLength(5);
#includeIn this example, we create an NSACString variable called "str" and initialize it with the value "Hello World!". Then, we use the SetLength() method to set the length of the string to 0. This would essentially clear the string and make it an empty string. Package library: nsACString is part of the Mozilla SpiderMonkey library.... nsACString str = "Hello World!"; str.SetLength(0);