如何格式化插入字符串 [英] How to format an interploated String

问题描述

我需要格式字符串，例如秒前发送％d ，哈利喜欢％s，我认为％1 $ s喜欢％2 $ s 。这些可以在Android中实现，但是我不怎么在Flutter的Dart中实现。

I need format string like "Send %d seconds ago", "Harry like %s", "I think %1$s like %2$s". These can be implemented in Android, but i don't how to implement in Dart of Flutter.

推荐答案

Dart支持字符串插值

Dart supports string interpolation

var seconds = 5;
print("Send $seconds seconds ago");

var harryLikes = 'Silvia';
var otherName = 'Erik';
var otherLikes = 'Chess';
print("Harry like $harryLikes");
print("I think $otherName like $otherLikes");

也可以使用 $ {...} <嵌入更复杂的表达式/ code>

Also more complex expressions can be embedded with ${...}

print('Calc 3 + 5 = ${3 + 5}');

数字类型和 intl 软件包提供格式化数字和日期的更多方法。

The number types and the intl package provide more methods to format numbers and dates.

例如参见

• < a href = https://www.dartdocs.org/documentation/intl/latest/intl/NumberFormat-class.html rel = noreferrer> https://www.dartdocs.org/documentation/intl/latest/ intl / NumberFormat-class.html


• dart的货币格式

• https://www.dartdocs.org/documentation/intl/latest/intl/NumberFormat-class.html
• Currency format in dart

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