How to rename key of object in an array

Question

How to replace array element value with another

i have array like this, without using jquery

 this.products = [
      { 
        text: 'prod1', 
        value: 1 
      },
      { 
        text: 'prod2', 
        value: 2 
      },
      { 
        text: 'prod3', 
        value: 3 
      }
 ];

i want to replace 'text' to 'label'

Answer 1

How about this?

 var products = [{ text: 'prod1', value: 1 }, { text: 'prod2', value: 2 }, { text: 'prod3', value: 3 } ]; products.forEach(function(obj) { obj.label = obj.text; delete obj.text; }); console.log(products);

Answer 2

使用 ES6：

const updatedProducts = products.map(({text: label, value})=>({value, label}));

Answer 3

There are many ways using map in ES6


  
 
  
  
  
 
   
 
    
    var products = [
          { 
            text: 'prod1', 
            value: 1 
          },
          { 
            text: 'prod2', 
            value: 2 
          },
          { 
            text: 'prod3', 
            value: 3 
          }
     ];

    const newProducts = products.map(({text: label, value})=>({value, label}));
    console.log(newProducts );

    console.log("===================Another  Method====================")


    products.map((el)=>{
    el.label = el.text
    delete el.text
    })

    console.log(products);
 
   
 
  

Answer 4

For people like me who are looking for an answer that does not mutate the original objects (which will cause errors in React) but instead want to return a new array full of new objects with only one specific key renamed in each object I have create the following function.

export const renameKey = (arr, oldKey, newKey) => {
  let newArray = [];

  arr.forEach((obj) => {
    let newObj = {};
    const keys = Object.keys(obj);
    keys.forEach((key) => {
      if (key === oldKey) {
        Object.assign(newObj,{ [newKey]: obj[oldKey] });
      } else {
        Object.assign(newObj,{ [key]: obj[key] });
      }
    });
    newArray.push(newObj);
  });

  return newArray;
};