How to convert an Integer to a String in V8?

问题

I have the following V8 code:

Local<String> getSumString(int32_t a,  int32_t b){
    int32_t sum = a + b;
    return String::Concat(String::New("The sum is: ") , String::New(sum));
}

In the above function I want to add a and b, then want to return a string "The sum is: CALCULATED_SUM " .

I'm having problems in converting the calculated sum to a String so that it can be concatenated with other String.

回答1:

You don't say the nature of the error, but I'm guessing that the end of your output string is mangled, because you're instantiating a String from an int. V8 is interpreting that data as const char * data. You should instantiate an Integer from your int. Your last line will look like this instead:

return String::Concat(String::New("The sum is: ") , Integer::New(sum));

来源：https://stackoverflow.com/questions/22379918/how-to-convert-an-integer-to-a-string-in-v8