From d7ea92c0194cac8bf0288ca2d4f97e5f419513b7 Mon Sep 17 00:00:00 2001
From: Apin <81305669+qjksxy@users.noreply.github.com>
Date: Thu, 25 Jul 2024 00:03:03 +0800
Subject: [PATCH] doc: update dart.md (#806)
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* doc: update dart.md

* doc: update dart.md

完善 import 部分内容

* doc: update dart.md

修正翻译错误，将 “地图” 修改为 “映射”
---
 docs/dart.md | 17 +++++++++++++----
 1 file changed, 13 insertions(+), 4 deletions(-)

diff --git a/docs/dart.md b/docs/dart.md
index 83a44d5..45a429a 100644
--- a/docs/dart.md
+++ b/docs/dart.md
@@ -90,8 +90,8 @@ double height = 1.85;
 // 您还可以将变量声明为 num
 // x 可以同时具有 int 和 double 值
 num x = 1;
-num += 2.5;
-print(num); // 打印: 3.5
+x += 2.5;
+print(x); // 打印: 3.5
 
 String name = "Nicola";
 bool isFavourite = true;
@@ -132,6 +132,15 @@ import 'dart:math';
 import 'package:test/test.dart';
 // 导入文件
 import 'path/to/my_other_file.dart';
+// 指定前缀
+import 'package:lib/lib.dart' as lib;
+lib.Element element = lib.Element();
+// 仅导入 foo
+import 'package:lib1/lib1.dart' show foo;
+// 不导入 foo
+import 'package:lib2/lib2.dart' hide foo;
+// 延迟导入，仅在需要时导入
+import 'package:greetings/hello.dart' deferred as hello;
 ```
 
 操作符
@@ -372,7 +381,7 @@ const constantCities = const ["New York", "Mumbai", "Tokyo"];
 ```dart
 // 映射是关联键和值的对象
 var person = Map<String, String>();
-// 要初始化地图，请执行以下操作：
+// 要初始化映射，请执行以下操作：
 person['firstName'] = 'Nicola';
 person['lastName'] = 'Tesla';
 print(person);
@@ -397,7 +406,7 @@ var halogens = {'fluorine', 'chlorine', 'bromine', 'iodine', 'astatine'};
 // 创建一个空集
 var names = <String>{};
 Set<String> names = {}; // 这也有效
-//var names = {}; // 创建地图，而不是集合
+//var names = {}; // 创建映射，而不是集合
 ```
 
 函数