Replace multiple strings between two indexes with in strings

abinas patra

I have a string. I want to replace substrings with in string. For each substring I have the starting and ending index. Using regex is out of scope.

So from let str = "I want chicken pizza and cheese pizza from point restaurant";

The expected result would be like this.

I want TYPE1 TYPE4 and TYPE1 pizza from point restaurant

let str = "I want chicken pizza and cheese pizza from point restaurant";

let roles = [{
    "start": 7,
    "end": 14,
    "typeId": "TYPE1",
    "type": "toppings",
    "text": "chicken"
  },
  {
    "start": 25,
    "end": 31,
    "typeId": "TYPE1",
    "type": "toppings",
    "text": "cheese"
  },
  {
    "start": 15,
    "end": 20,
    "typeId": "TYPE4",
    "type": "main ingredient",
    "text": "pizza"
  }
];

let styledStr = str;
roles.map(r => {
  const { start, end, typeId, text } = r;
  let strArr = str.split('');
  let removeStr = strArr.splice(start, end, typeId);
  styledStr = strArr.join('');
  console.log(styledStr);
});

mplungjan

Do not use a map if you do not need a
No need to split unless you MUST use splice

Method using start and end - note I sort the roles so we start at the highest position

let str = "I want chicken pizza and cheese pizza from point restaurant";

let roles = [{
    "start": 7,
    "end": 14,
    "typeId": "TYPE1",
    "type": "toppings",
    "text": "chicken"
  },
  {
    "start": 25,
    "end": 31,
    "typeId": "TYPE1",
    "type": "toppings",
    "text": "cheese"
  },
  {
    "start": 15,
    "end": 20,
    "typeId": "TYPE4",
    "type": "main ingredient",
    "text": "pizza"
  }
];

let styledStr = str;
roles.sort((a,b)=>b.start-a.start)
roles.forEach(r => {
  const { start, end, typeId, text } = r;
  // Using substring because it is more readable and saves a split
  styledStr = styledStr.substring(0,start) + typeId + styledStr.substring(end)
  styledStr.slice(start,end,typeId)
});
console.log(styledStr)

Method using text replace

let str = "I want chicken pizza and cheese pizza from point restaurant";

let roles = [{
    "start": 7,
    "end": 14,
    "typeId": "TYPE1",
    "type": "toppings",
    "text": "chicken"
  },
  {
    "start": 25,
    "end": 31,
    "typeId": "TYPE1",
    "type": "toppings",
    "text": "cheese"
  },
  {
    "start": 15,
    "end": 20,
    "typeId": "TYPE4",
    "type": "main ingredient",
    "text": "pizza"
  }
];

let styledStr = str;
roles.forEach(r => {
  const { start, end, typeId, text } = r;
  console.log(start,end,text)
  styledStr = styledStr.replace(text,typeId)
});
console.log(styledStr)

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Please contact [email protected] to delete if infringement.

edited at2021-06-1

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