Creating an array of strings using data from a separate array of objects in JavaScript/TypeScript

I want to generate a new array of strings based on an existing array of objects, with each object belonging to the Employee class and having a firstName field:

assignees: Array<Employee>;
options: string[];

I attempted to achieve this using the following approach:

this.options = this.assignees.forEach(value => value = value.firstName);

However, I encountered an error stating

type 'void' is not assignable to type 'string[]'

Can someone offer assistance?

Answer №1

When utilizing the forEach() method, a specified function is executed once for each element in an array.

Alternatively, consider using the map() method as it may be the optimal approach for these types of tasks.

// Below demonstrates how this process could be implemented
this.options = this.assignees.map(value => value.firstName);

With the map() method, a fresh array is generated by executing a provided function on every element within the original array.

Enjoy exploring and coding :)

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