Question

Given that Groovy does not have a do-while statement, how can I iterate over all bytes in an input stream?

Per a previous version of the Groovy user guide:

No ‘do … while()’ syntax as yet.

Due to ambiguity, we’ve not yet added support for do .. while to Groovy

What would be the best way to do something like the following Java code in Groovy?

def numRead = inputStream.read(fileBytes, 0, fileBytes.length);
do{

} while(numRead > 0);

(I know I can do that using a boolean, I just want to know if there’s a “Groovy” way of doing it)

Answer 1

The groovy (version 1.8+) way would be like this:

inputStream.eachByte(BUFFER_SIZE) { buffer, numRead ->
    ...
}