Basically in the first part of the code the condition in the if statement says "if the file reuters21578 does not exist in the mahout-work directory"
Note: The ! is the logical NOT operator.
If the file does not exist in the specified directory the code under the if statement (the 2nd part you wanted understand) uses the program curl to download the file from a website and saves it in the mahout-work directory.
i am a student of diploma in electronics and telecomm
can anyone suggest me projects related to the below domains:-
electrical and electronics