Convert Map to CSV line

map2csv.groovy

def result = ""
def delim = ","
def enclose = "\""
payload.each { key, value ->
	if (value instanceof String) {
		csvValue = enclose + value + enclose
	}
	else {
		csvValue = value
	}
	if (result.length() > 0) {
		result += delim
	}
	result += csvValue
}
return result

List of maps to CSV with headers

def delim = ";"
def payload = [[a:1, b:'abc'], [a:2, b:'ced']]
[
  payload[0].keySet().join(delim),
  payload.collect{ it.values().join(delim) }
]
.flatten().join('\n') 

Result

a;b
1;abc
2;ced