区分 dart 字符串中的换行符

Question

我有以下代码：

const myString = """
BEGIN:VCALENDAR
PRODID:-//xyz Corp//NONSGML PDA Calendar Version 1.0//EN
VERSION:2.0
BEGIN:VEVENT
DTSTAMP:19960704T120000Z
UID:[email protected]
ORGANIZER:mailto:[email protected]
DTSTART:19960918T143000Z
DTEND:19960920T220000Z
STATUS:CONFIRMED
CATEGORIES:CONFERENCE
SUMMARY:Networld+Interop Conference
DESCRIPTION:Networld+Interop Conference and Exhibit\n Atlanta World Atlanta, Georgia
END:VEVENT
END:VCALENDAR
""";

注意

\n

属性中的

DESCRIPTION

。 现在我想将字符串分成几行。使用

myString.split("\n")

时， 它还分割了描述行。 我怎样才能告诉 dart 只分割“真正的”换行符？

Answer 1

您可以通过在左引号前添加

myString

将 r 声明为

原始字符串

。

const myString = r"""
BEGIN:VCALENDAR
PRODID:-//xyz Corp//NONSGML PDA Calendar Version 1.0//EN
VERSION:2.0
BEGIN:VEVENT
DTSTAMP:19960704T120000Z
UID:[email protected]
ORGANIZER:mailto:[email protected]
DTSTART:19960918T143000Z
DTEND:19960920T220000Z
STATUS:CONFIRMED
CATEGORIES:CONFERENCE
SUMMARY:Networld+Interop Conference
DESCRIPTION:Networld+Interop Conference and Exhibit\n Atlanta World Atlanta, Georgia
END:VEVENT
END:VCALENDAR
""";

void main() {
  myString.split("\n").forEach(print);
}

哪个输出：

BEGIN:VCALENDAR
PRODID:-//xyz Corp//NONSGML PDA Calendar Version 1.0//EN
VERSION:2.0
BEGIN:VEVENT
DTSTAMP:19960704T120000Z
UID:[email protected]
ORGANIZER:mailto:[email protected]
DTSTART:19960918T143000Z
DTEND:19960920T220000Z
STATUS:CONFIRMED
CATEGORIES:CONFERENCE
SUMMARY:Networld+Interop Conference
DESCRIPTION:Networld+Interop Conference and Exhibit\n Atlanta World Atlanta, Georgia
END:VEVENT
END:VCALENDAR