替换JSON中的嵌套字符串 [英] Replace nested string in JSON

问题描述

我正在尝试做两件事:

1. 在JSON文件中搜索字符串("TODO")
2. 替换 带有先前发生的字符串的字符串(开始测验")

1. Search a JSON file for a string ("TODO")
2. Replace that string with the string that occurred previously ("Start Quiz")

因此，所有TODO必须替换为"englishDefault"中出现的字符串.

So, all the TODO's have to be replaced by the string occurring in "englishDefault".

我有以下JSON:

{
  "semantics": [
    {
      "englishLabel": "Quiz introduction",
      "fields": [
        {
          "englishLabel": "Display introduction",
        },
        {
          "englishDefault": "Start Quiz",
          "default": "TODO"
        }
      ]
    }
  ]
}

第2部分已经解决，但是我很难扩展答案: 替换为JSON数组中的前一个字符串

Part 2 has been solved already, but I am having trouble extending the answer: Replace with previous string in a JSON array

推荐答案

此处需要一系列for循环，根据您的示例，尚不清楚TODO是否可以出现在JSON结构中的任何地方或字段的下方，所以我将假设最简单，即它只能出现在fields数组中

You need a series of for loops here, from your example, it is not quite clear if TODO can appear anywhere in the JSON structures or just under the fields, so I will assume the simplest i.e. that it can only appear in the fields array

        for(var i = 0; i < semantics[0].fields.length; i++)
        {
          var fields = semantics[0].fields[i];

          //declare empty previous variable to store the previous key
          var previousKey;
          for (var key in fields) {

          if (p.hasOwnProperty(key)) {
            var value = fields[key];

           if(value == 'TODO')
           {
             console.log('Found TODO, please replace');
           }
           else {
             //If value was not TODO, then we save the present key to be used in the next iteration step as the previous key
             previousKey = key;
           } 
      }
    }
}

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