javascript-返回带有过滤子数组的父对象

样本数据：

{
    "QuestionId": 2,
    "QuestionName": "Question2",
    "QuestionTypeId": 2,
    "QuestionTypeName": "CheckBoxList",
    "Choices": [{
            "ChoiceId": 7,
            "ChoiceName": "Choice1",
            "Answer": "7"
        },
        {
            "ChoiceId": 8,
            "ChoiceName": "Choice2",
            "Answer": ""
        },
        {
            "ChoiceId": 9,
            "ChoiceName": "Choice3",
            "Answer": ""
        },
        {
            "ChoiceId": 10,
            "ChoiceName": "Choice4",
            "Answer": "10"
        }
    ]
}

根据样本数据,如何使用Underscore或任何更好的javascript方法将过滤后的Choices保持相同的结构返回？根据Choice.Answer筛选Choice.答案必须有一个值.

解决方法:

如果您想用空白答案过滤掉选择,请使用Array.filter-我还假设您上面的数据结构在一个数组内(一个问题数组)

//Loop over each question
for (var i = 0; i < questions.length; i++) {
    //For each question, filter the "Choices" array to not include empty Answers
    questions[i].Choices = questions[i].Choices.filter(function(choice) {
        return choice.Answer != ""
    })
}

标签：nested-lists,multidimensional-array,underscore-js,javascript,jquery
来源： https://codeday.me/bug/20191120/2044297.html