how to use the object variable inside string

Question

I'm trying to create a string with a prefix variable which will dynamically allocate from the array of object but it shows UNDEFINED

this is my code

    app.post("/objectlooping",(req,res)=>{
    const myArray = [{"name":"venkat","number":"2345678900"}, {"name":"jhon","number":"2345678900"}, {"name":"selva","number":"2345678900"}];
    const message =`HI ${n}`;
myArray.forEach((element, index, array) => {
    var n=element.name;
    console.log(element.message); 
    
});
     
   });

can anyone help me to achieve this but this shows undefined

What do you expect it to return ? Since none of the elements have message key, accessing it via element.message returns undefined. — Pawan Sharma
– Pawan Sharma, Commented May 4, 2022 at 11:47
n doesn't exist when message is defined. Consider using console.log(`Hi ${element.name}`)? — evolutionxbox
– evolutionxbox, Commented May 4, 2022 at 11:47

Andy · Accepted Answer · 2022-05-04 12:00:06Z

2

If I understand this correctly you're trying to log a message for each name.

You can map over the objects in the array and return an array containing a message for each name in each object, and then join that array of messages up with a line break.

const myArray=[{name:"venkat",number:"2345678900"},{name:"jhon",number:"2345678900"},{name:"selva",number:"2345678900"}];

const message = myArray.map(obj => {
  return `Hi ${obj.name}`;
}).join('\n');

console.log(message);

edited May 4, 2022 at 12:00

answered May 4, 2022 at 11:52

Andy

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Comments

moosylla · Accepted Answer · 2022-05-04 14:27:51Z

1

use message fn instead of variable then call it like

const message = (name)=>`Hi ${name}`
myArray.forEach((element, index, array) => {
    var name=element.name;
    console.log(message(name)); 
    
});

edited May 4, 2022 at 14:27

answered May 4, 2022 at 11:53

moosylla

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2 Comments

Venkat Cpr Over a year ago

yes its works but instead of declaring {name} than ${name}

moosylla Over a year ago

Good catch; edited.

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