Question

试图遍历道具在其他组件上传递的状态

state = {
    question:[firstQ, secondQ, thirdQ],
    tag:[[1,2,3],[4,6],[a,b,c,d]]
    }

我想用Patter在下一个Componet上渲染它，

FirstQ

[tag1]

SecondQ

[tag2]

ThirdQ

[tag3]

等我尝试了很多选择，但总是得到类似的东西

FirstQ

SecondQ

ThirdQ

[tag1]

[tag2]

[tag3]

编辑：

将数据传递到第二个组件

question={this.state.question}
     tag={this.state.tag}

EDIT2：

现在我做了这样的循环

{this.props.question.map((item,) => {
    return (<span key={item}>{item}</span>)
  })}
{this.props.tag.map((item) => {
    return (<span>{item<span>)
    })}

我试图将这两个数组呈现为对Question1 => Tag1，然后在第二个Question2 => tag2等下面。

Answer 1

使用索引/** * Possibility to lose precision at large numbers * @param number * @returns Number number */ var roundUpToNearestHundredth = function(number) { // Ensure that we use high precision Number number = Number(number); // Save the original number so when we extract the Hundredth decimal place we don't bit switch or lose precision var numberSave = Number(number.toFixed(0)); // Remove the "integer" values off the top of the number number = number - numberSave; // Get the Hundredth decimal places number *= 100; // Ceil the decimals. Therefore .15000001 will equal .151, etc. number = Math.ceil(number); // Put the decimals back into their correct spot number /= 100; // Add the "integer" back onto the number return number + numberSave; }; console.log(roundUpToNearestHundredth(6132423.1200000000001))获取匹配的标签

类似的东西：

question

如何遍历具有2个数组的对象？

1 个答案: