javascript - 删除数组项列表

您能告诉我如何使用lodash删除数组项列表吗？我已经尝试如下所示。但是它不起作用。

Video about the issue.

  _.remove(previousNumberArray, (a) => {

         _.some(this.removedQuestionCodes, (val, k) => {
            return a.questionCode == val.questionCode;
        });

   });

最佳答案

问题是括号{}
{}中的箭头功能应具有return

我们试试吧

  _.remove(previousNumberArray, (a) => _.some(this.removedQuestionCodes, (val, k) => {
       return a.questionCode == val;
  }));

要么

  _.remove(previousNumberArray, (a) => {

         return _.some(this.removedQuestionCodes, (val, k) => {
            return a.questionCode == val;
        });

   });

让我们看看我的例子：

var fruits1 = ['Apple', 'Banana', 'Orange', 'Celery'];

_.remove(fruits1, fruit => {//BRACKET
  //MUST HAVE RETURN KEYWORD
  return _.indexOf(['Apple', 'Banana', 'Orange'], fruit) !== -1
});

var fruits2 = ['Apple', 'Banana', 'Orange', 'Celery'];
_.remove(fruits2, fruit => {//BRACKET
  //DONT HAVE RETURN KEYWORD
  _.indexOf(['Apple', 'Banana', 'Orange'], fruit) !== -1
});

console.log('fruits1',fruits1)


console.log('fruits2', fruits2)

<script src="https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.6.1/lodash.js"></script>

关于javascript - 删除数组项列表，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/43961394/