Replace Nested String In Json

I am trying to do two things: Search a JSON file for a string ('TODO') Replace that string with the string that occurred previously ('Start Quiz') So, all the TODO's have to be

Solution 1:

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 keyvar 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;
           } 
      }
    }
}

Solution 2:

Analyzing the input json structure, you are able to detect that the crucial array of objects is in fields property.Use the following approach:

var jsonData = '{"semantics":[{"englishLabel":"Quiz introduction","fields":[{"englishLabel":"Display introduction"},{"englishDefault":"Start Quiz","default":"TODO"}]}]}';

jsonData = JSON.parse(jsonData);
jsonData['semantics'][0]['fields'].forEach(function(o){
    o['default'] && o['default'] === 'TODO' && (o['default'] = o['englishDefault']);
})

console.log(JSON.stringify(jsonData, 0, 4))

Solution 3:

I read your previous question to better understand what you mean and I believe this is what you're looking for.

// Assign json to a variable so we can mutate it using JSvar data = {
  "semantics": [
    {
      "englishLabel": "Quiz introduction",
      "fields": [
        {
          "englishLabel": "Display introduction",
        },
        {
          "englishDefault": "Start Quiz",
          "default": "TODO"
        }
      ]
    }
  ]
};

// Loop over semantics and then fields to find the default values with TODO// Replace by simply assigning the new value
data.semantics.forEach(function(semantic) {
    semantic.fields.forEach(function(field) {
        if (field.default === 'TODO')
            field.default = field.englishDefault;
    });
});

Solution 4:

Can u try json stringify and replace method

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

var data= JSON.stringify(js_replace).replace(/TODO/g, '"REPLACETHIS"');
console.log(data);

Solution 5:

I apologize for doing crazy indentation but it helps when I work in the console. JSON.stringify is (ab)used for its object walking. I grab the first sibling that doesn't have a value of 'TODO' when one of its siblings does... It is dificult to chose the one 'before' the 'todo' because it's a map not an array maps officially don't have a 'before' Don't do string manipulation though. This is the way you do it.

Please note that I am mutating the object that is passed to deToDoify, also note that this is general purpose and will deeply change any structure no matter where the 'TODO' value is.

constdeToDoify = x =>
{ JSON.stringify
  (x,
    (k,v) =>
    { const keys = Object.keys( v )
      let toDude;
      const check = keys.some
      ( a=> ((v[a] == 'TODO') && (toDude=a,1) ))
      if ( check )
      { keys.some
        ( a => ((v[a] !== 'TODO') && (v[toDude] = v[a],1) )) }
      return v } )
   return x }

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