Cobra Forums

extend StreamReader
    """Makes StreamReader iterable (by line)"""
    
    cue enumerate as String*
        """Yields each line in the open file"""
        
        test
            
            # Make and test a file:
            
            File.writeAllText("Source", "line 1\nline 2\nline 3")
            lines = []
            
            using file = File.openText("Source")
                for line in file, lines.append(line)
                
            assert lines == ["line 1\n", "line 2\n", "line 3"]
            
            File.delete("Source")
            
            # Make and test an empty file:
            
            File.writeAllText("Source", "")
            lines = []
            
            using file = File.openText("Source")
                for line in file, lines.append(line)
            
            assert lines == []
            
            File.delete("Source")
        
        body
        
            while true
                line = .readLine
                if line is nil, break
                yield line to !

extend TextReader

    def readLines as String*
        ...

...

for line in tr.readLines, print line