toCommaStr method
逗号隔开的字符串
Implementation
String toCommaStr() {
List tempList = [];
String str = '';
this.forEach((f) {
tempList.add(f);
});
tempList.forEach((f) {
if (str == '') {
str = "$f";
} else {
str = "$str" "," "$f";
}
});
return str;
}