javascript - How to remove space in keys of a JSON object - Stack Overflow

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I have an output like below:

output = {
  "New Classroom": [{
    "Name": "Apple",
    "Age": "6",
    "Percentage": "24.00%"
  }, {
    "Name": "Orange",
    "Age": "5",
    "Percentage": "9.88%"
  }, {
    "Name": "Green",
    "Age": "2",
    "Percentage": "27.27%"
  }, {
    "Name": "Grey",
    "Age": "6",
    "Percentage": "12.63%"
  }]
}

How do I replace New Classroom with NewClassroom and the New classroom is not always a "NewClassroom".It may be different text

ob = JSON.parse(output);

alert(Object.keys(ob))

when I do this, I'm getting Newclassroom as the key

I have an output like below:

output = {
  "New Classroom": [{
    "Name": "Apple",
    "Age": "6",
    "Percentage": "24.00%"
  }, {
    "Name": "Orange",
    "Age": "5",
    "Percentage": "9.88%"
  }, {
    "Name": "Green",
    "Age": "2",
    "Percentage": "27.27%"
  }, {
    "Name": "Grey",
    "Age": "6",
    "Percentage": "12.63%"
  }]
}

How do I replace New Classroom with NewClassroom and the New classroom is not always a "NewClassroom".It may be different text

ob = JSON.parse(output);

alert(Object.keys(ob))

when I do this, I'm getting Newclassroom as the key

• javascript

Share Improve this question Follow edited Nov 25, 2016 at 11:54 Rajesh 25k55 gold badges5050 silver badges8383 bronze badges asked Nov 25, 2016 at 11:52 chandra sekhar juthugachandra sekhar juthuga 111 silver badge33 bronze badges

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3 Answers 3

Sorted by: Reset to default 2

You can loop through the top-level property names in the object you receive, detect any with spaces, and remove the spaces. (You don't need to, they're perfectly valid property names, but you can if you want.)

var output = { "New Classroom": [{"Name": "Apple","Age": "6","Percentage": "24.00%"},{"Name": "Orange","Age": "5","Percentage": "9.88%"},{"Name": "Green","Age": "2","Percentage": "27.27%"},{"Name": "Grey","Age": "6","Percentage": "12.63%"}]};
var name, newName;
// Loop through the property names
for (var name in output) {
  // Get the name without spaces
  newName = name.replace(/ /g, "");
  // If that's different...
  if (newName != name) {
    // Create the new property
    output[newName] = output[name];
    // Delete the old one
    delete output[name];
  }
}
console.log(output);

Note that using delete on an object can reduce the performance of subsequent property lookups. 99.99% of the time, that doesn't matter. If it matters in your case, create a new object rather than modifying it in place:

var output = { "New Classroom": [{"Name": "Apple","Age": "6","Percentage": "24.00%"},{"Name": "Orange","Age": "5","Percentage": "9.88%"},{"Name": "Green","Age": "2","Percentage": "27.27%"},{"Name": "Grey","Age": "6","Percentage": "12.63%"}]};
var name, newName;
var newOutput = {};
// Loop through the property names
for (var name in output) {
  // Get the name without spaces
  newName = name.replace(/ /g, "");
  
  // Copy the property over
  newOutput[newName] = output[name];
}
console.log(newOutput);

• Use Object.keys to get all keys of the object
• Use String#replace to replace character from String

var obj = {
  "New Classroom": [{
    "Name": "Apple",
    "Age": "6",
    "Percentage": "24.00%"
  }, {
    "Name": "Orange",
    "Age": "5",
    "Percentage": "9.88%"
  }, {
    "Name": "Green",
    "Age": "2",
    "Percentage": "27.27%"
  }, {
    "Name": "Grey",
    "Age": "6",
    "Percentage": "12.63%"
  }]
};

Object.keys(obj).forEach(function(key) {
  var replaced = key.replace(' ', '');
  if (key !== replaced) {
    obj[replaced] = obj[key];
    delete obj[key];
  }
});
console.log(obj);

Note: Only single occurrence of space is considered, RegEx could be used if space occurrence is more than once!

Loop in each keys of the json, then parse.

try regexp

var word = "New Classroom"
word = word.replace(/\s/g, '');
console.log(word)

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