Simple CSV text merge script

CsvMerge.groovy

def inputFiles = []

args.each{ fn ->
	inputFiles << new File(fn)
}

new File('merged.csv').withWriter{ out ->

	def outputLines = []
	
	inputFiles.each{ file ->
		def lineNo = 0
		file.eachLine{ line ->
			if(!outputLines[lineNo]) {
				outputLines[lineNo] = [line]
			} else {
				outputLines[lineNo] << [line]
			}
			lineNo++
		}
	}
	
	//outputLines.each{ println it.flatten().join(',') } //to Console
	outputLines.each{ out <<  it.flatten().join(',') <<'\n' }
}