How to replace all substrings with other string javascript

Question

I am loading data and then putting it in an input, the data that it enters goes under the name "Business Type" and I need to change that to "businessTypeId"

for example

actually I have

[{"URL":"http://www.restaurant.com","Business Type":1},{"URL":"http://www.hotel.com","Business Type":2}]

I would like to:

replace all "Business Type" to "businessTypeId"
[delete square brackets]
add "" to id (id is the number in Business Type)

this is the espected result

{"url":"http://www.restaurant.com","businessTypeId":"1"},{"url":"http://www.hotel.com","businessTypeId":"2"}

this is my code

placesArray.push(JSON.stringify(results.data));
console.log(placesArray);
document.getElementById('places').value = placesArray;

placesArray contains the string that I would like to change

What do you expect from placesArray.push(JSON.stringify(results.data));, and what does console.log(placesArray); log afterwards? As it is an array of string(s), it simply can not be what is shown as "actually I have". — tevemadar
– tevemadar, Commented Feb 10, 2021 at 23:26

SimpleJ · Accepted Answer · 2021-02-10 22:41:49Z

2

You could use the array map function:

const data = [
  { "URL":"http://www.restaurant.com", "Business Type": 1},
  { "URL":"http://www.hotel.com", "Business Type": 2 },
];

const result = data.map(value => ({
  url: value.URL,
  businessTypeId: value["Business Type"]?.toString(),
}));

console.log(result);

edited Feb 10, 2021 at 22:41

answered Feb 10, 2021 at 22:22

SimpleJ

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3 Comments

Andre Over a year ago

I get Uncaught TypeError: Cannot read property 'toString' of undefined

SimpleJ Over a year ago

That happens if the Business Type field is missing in one of the array values. I'll update my answer to account for the missing field.

Andre Over a year ago

thanks, that works, but when I tried to change the string to my placesArray I get an [object Object] result, and if I use JSON.stringify(result) I get only this [{}]

The Bomb Squad · Accepted Answer · 2021-02-10 23:09:13Z

1

const data=
[{"URL":"http://www.restaurant.com","Business Type":1},{"URL":"http://www.hotel.com","Business Type":2}]

//"Buisness Type" is a key, so firstly, go through each index, then in each index search through its keys and do replacing stuffs
data.forEach(a=>{
  Object.keys(a).forEach(b=>{
    if(b=="Business Type"){//what you want replaced
      var n=a[b].toString() //value to put in replaced key(and to string because you told me that you want string data not number data)
      delete(a[b]) //deleting old key
      a["businessTypeId"]=n //adding replaced key with previous value
    }
  })
})

console.log(data)

edited Feb 10, 2021 at 23:09

answered Feb 10, 2021 at 22:22

The Bomb Squad

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4 Comments

Andre Over a year ago

thanks! but I get a result with [square brackets], I have to delete that [], with your code I had to use JSON.stringify(data); because the result was [object][object]. How can I delete that []? and I have to add "" to id number. for example "businessTypeId":"1"

The Bomb Squad Over a year ago

@AndréCuellarAvaroma for the first thing.. trying to put data into an HTML element would do something like that.. secondly, for the turning 1 to "1" consider that done

Andre Over a year ago

when I put the result in an input, puts it with the brackets

Andre Over a year ago

I solved adding this .toString().replace(/^[([\s\S]*)]$/,'$1')

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