CODEWITHSUNDEEP
javascriptarrays
ds97
ds97

Reputation: 107

Need to modify array as per specific requirement in javascript

So I am working in typescript where I need to modify an array to some specific pattern.

Here is my array:

["sunday","monday","tuesday"]

This is what I need it to be like:

["day:Sunday","day:Monday","day:Tuesday"]

I have already tried map method like this:

result = arr.map(x => ({day: x}));

But map gives me result some different which is not needed:

[{"day":"sunday"},{"day":"monday"},{"day":"tuesday"}]

Upvotes: 1

Views: 42

Answers (4)

Mamunur Rashid
Mamunur Rashid

Reputation: 1185

const days = ["sunday","monday","tuesday"];

const dayFun = days.map((day) => {
  const dayUppercase = day.charAt(0).toUpperCase() + day.slice(1);
  return `day:${dayUppercase}`;
});

console.log(dayFun);

Upvotes: 0

Vladislav Ladicky
Vladislav Ladicky

Reputation: 2487

Array map is the right method, you just need to return a string, not an object:

result = arr.map(d => `day:${d.toUpperCase()}`)

Upvotes: 1

Bernat
Bernat

Reputation: 554

The problem is that you are adding those brackets, here's a solution:

const original = ["sunday","monday","tuesday"]
console.log(original)
  
const result = original.map(day => `day:${day}`);
console.log(result)

//["day:sunday", "day:monday", "day:tuesday"]

Upvotes: 1

user15388024
user15388024

Reputation:

You're trying to prepend the strings and to change the first letter to upper:

const arr = ["sunday","monday","tuesday"];
const result = arr.map(x => 'day:' + x[0].toUpperCase() + x.slice(1));
console.log(result);

Upvotes: 1

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