CODEWITHSUNDEEP
javascript
John
John

Reputation: 41

Use a function on every value in an array

Iam new to javascript and help is very much appreciated. I have the following array:

let array = 
[{key: "sabc", value: 19},
 {key: "spalabc", value: 21},
 {key: "spalte2", value: 22},
 {key: "spabc2", value: 22},
 {key: "spabce2", value: 23}]

I want to have a new array, where all the values are changed through a function (in this case logarithm base 10). So the new array should look like this:

let array = 
[{key: "sabc", value: 1.278753601},
 {key: "spalabc", value: 1.322219295},
 {key: "spalte2", value: 1.342422681},
 {key: "spabc2", value: 1.342422681},
 {key: "spabce2", value: 1.361727836}]

I tried forEach, but i dont get the result i want.

Upvotes: 3

Views: 69

Answers (2)

Majed Badawi
Majed Badawi

Reputation: 28434

You can use .map:

let array = 
[{key: "sabc", value: 19},
 {key: "spalabc", value: 21},
 {key: "spalte2", value: 22},
 {key: "spabc2", value: 22},
 {key: "spabce2", value: 23}]
 
arr = array.map(e => {
  return {...e, value:Math.log10(e['value'])};
});

console.log(...arr);

Upvotes: 2

Christian Carrillo
Christian Carrillo

Reputation: 2761

let array = 
[{key: "sabc", value: 19},
 {key: "spalabc", value: 21},
 {key: "spalte2", value: 22},
 {key: "spabc2", value: 22},
 {key: "spabce2", value: 23}]
 
const result = array.map(a => ({ ...a, value: Math.log10(a.value)}))

console.log(result)

Upvotes: 0

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