Question

所以我得到了一个看起来像这样的html

<a href="1" class="link">
 <div class="div1">
  <div class="A"></div>
 </div>
</a>
<a href="2" class="link">
 <div class="div1">
  <div></div>
 </div>
</a>
<a href="3" class="link">
 <div class="div1">
  <div class="C"></div>
 </div>
</a>

我想获取第二个div标签并将其放入数组，使其变为这样

arr = [A,0,C]

Answer 1

通过选择器定位div标签（具有“ div1”类）并查找内部div 并检查它是否具有此类。

package main

import (
    "encoding/json"
    "fmt"
)

type ResultStruct struct {
    Result *[]map[string]string `json:"result"`
}

    func main() {
        //case 1
        var jsonData1 ResultStruct        
        err := json.Unmarshal([]byte(`{"result":[{"Name":"ADF","Job":"ENG"},{"Name":"ASK","Job":"TEST"}]}`), &jsonData1)
        fmt.Println(err)
        fmt.Println(jsonData1.Result)

        fmt.Println()

        //case 2
        var jsonData2 ResultStruct        
        err = json.Unmarshal([]byte(`{}`), &jsonData1)
        fmt.Println(err)
        fmt.Println(jsonData2.Result)

    }

Answer 2

您可以尝试使用jQuery的.map()和.get()

@Configuration
@EnableWebSecurity
class SecurityConfiguration : WebSecurityConfigurerAdapter() {

    override fun configure(http: HttpSecurity) {
        http.authorizeRequests()
            .antMatchers("/health").permitAll()
            .anyRequest().authenticated()
            .and()
            .oauth2Login()
            .permitAll()
    }
}

var arr = $('.div1 > div').map(function(){
  return $(this).attr('class') == undefined? 0 : $(this).attr('class');
}).get();

console.log(arr);

Answer 3

setdefault

添加了演示：https://jsfiddle.net/Rakesh029/460c5tLv/1/

Answer 4

Oneliner

let arr = [...document.querySelectorAll(".link>.div1>div")].map(div => div.className || "0")

console.log(arr)

<a href="1" class="link">
  <div class="div1">
    <div class="A"></div>
  </div>
</a>
<a href="2" class="link">
  <div class="div1">
    <div></div>
  </div>
</a>
<a href="3" class="link">
  <div class="div1">
    <div class="C"></div>
  </div>
</a>

如何使用Jquery从元素中获取所有值并将其放入数组？

4 个答案: