我想将JSON树转换为Angular2中的无序列表.我知道Angular1的递归指令解决方案,我很确定Angular2中的解决方案也是递归的.
[
{name:"parent1", subnodes:[]},
{name:"parent2",
subnodes:[
{name:"parent2_child1", subnodes:[]}
],
{name:"parent3",
subnodes:[
{name:"parent3_child1",
subnodes:[
{name:"parent3_child1_child1", subnodes:[]}
]
}
]
}
]
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这个无序的清单
<ul>
<li>parent1</li>
<li>parent2
<ul>
<li>parent2_child1</li>
</ul>
</li>
<li>parent3
<ul>
<li>parent3_child1
<ul>
<li>parent3_child1_child1</li>
</ul>
</li>
</ul>
</li>
</ul>
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使用Angular2和ngFor.有人有个主意吗?
我尝试从 NPM 7 的对等依赖项检查中排除包react-virtualized。我知道我可以单独安装该包
npm install react-virtualized --legacy-peer-deps
...但我的目标是使用 npm install 安装所有软件包,并且不应检查此软件包的对等依赖关系。那可能吗?
我会接受任何向我展示如何操作 package.json 的答案,以便新的npm 安装运行时不会出现对等依赖错误。我有以下 package.json:
{
"name": "test",
"version": "1.0.0",
"description": "",
"main": "index.js",
"scripts": {
"test": "echo \"Error: no test specified\" && exit 1"
},
"keywords": [],
"author": "",
"license": "ISC",
"devDependencies": {
"react": "^17.0.2",
"react-dom": "^17.0.2",
"react-redux": "^7.2.4",
"react-router": "^5.2.0",
"react-router-dom": "^5.2.0",
"react-beautiful-dnd": "^13.1.0",
"react-device-detect": "^1.11.14",
"react-markdown": "^7.0.0",
"react-resize-detector": "^6.7.1",
"react-virtualized": "^9.22.3"
}
}
Run Code Online (Sandbox Code Playgroud) Netbeans 8中显示方法参数和方法返回值的快捷方式是什么?
我有一个应用程序,其中有一个 ScrollView 和一个按钮,里面有一个长文本:
return (
<ScrollView>
<Button onPress={slowlyScrollDown} title="Slowly scroll a bit down..." />
<Text>
[ Very long text here where user has to scroll ]
</Text>
</ScrollView>
)
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当用户按下按钮时,我想慢慢向下滚动一点,这样他就可以看到文本的前 5-10 行。
我会接受任何提供一段代码的答案,我可以如何实现它。
如何将数组 ["a","b","c"] 插入到 test 中?
create table test( f json [] );
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我试过
insert into test (f) values('{\"a\",\"b\",\"c\"}');
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但是当我选择它时,会显示转义反斜杠。如果不逃避它根本不起作用。(令牌“a”无效)
select * from test;
f
----
{"\"a\"","\"b\"","\"c\""}
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angular ×1
html-lists ×1
insert ×1
netbeans ×1
npm ×1
npm-install ×1
postgresql ×1
react-native ×1
scrollview ×1
tree ×1