Question

[在此处输入图片说明] [1]请帮助我，因为我正在努力争取一些工作。我有一个JSON代表我的应用程序中的树视图。

{
    name: 'Global',    toggled: true,    children: [
        {
            name: 'Region A', nodeid:  0,chosen: true,pushed: false,
            children: [
                { name: 'Town A', nodeid: 1, chosen: true, pushed: false,
                  children: [{
                    name : "child 1", pushed: false, chosen:false
                  }]
                },
                { name: 'Town B', nodeid: 2, chosen: false, pushed: false,
                  children: [{
                    name : "child 2", pushed: false, chosen: false
                  }]
                }
            ]
        }
    ]
};

我想要做的是遍历我的JSON，只返回选中属性为true的条目。

到目前为止，我尝试了许多没有成功的事情，你们能帮助我吗？

https://i.stack.imgur.com/r61MO.jpg

   onPush(e){
      var chosennodes =  filters.filterTreeChosen(this.state.data);
      this.setState({selectednodes: chosennodes});
    }

然后过滤器本身：

[Object.filter = (obj, predicate) =>
        Object.keys(obj)
            .filter( key => predicate(obj\[key\]) )
            .reduce( (res, key) => (res\[key\] = obj\[key\], res), {} );

export const isChosen = (chosen) =>{
    return chosen == true;
}

export const filterTreeChosen = (nodes) => {
    var filtered = Object.filter(nodes, node => node.chosen == true);
    console.log(filtered);
};][1]

https://i.stack.imgur.com/IAXZ7.jpg

Answer 1

检查一下。我认为它应该适用于你的任务。

＆＃13;

const tree = {
    name: 'Global',    toggled: true,    children: [
        {
            name: 'Region A', nodeid:  0,chosen: true,pushed: false,
            children: [
                { name: 'Town A', nodeid: 1, chosen: true, pushed: false,
                  children: [{
                    name : "child 1", pushed: false, chosen:false
                  }]
                },
                { name: 'Town B', nodeid: 2, chosen: false, pushed: false,
                  children: [{
                    name : "child 2", pushed: false, chosen: false
                  }]
                }
            ]
        }
    ]
};

function getChosenNodes (nodes) {
  let result = [];
  
  nodes.forEach(node => {
    if (node.chosen) {
      result = result.concat([node.nodeid]);
    }


    if (node.children) {
      result = result.concat(getChosenNodes(node.children));
    }
  })
  
  return result;
}

console.log(getChosenNodes([tree]))

＆＃13;

我只返回了nodeid，但您可以根据需要进行更改。

ReactJS过滤复杂的Json

1 个答案: