how to use the join function from the lodash library in typescript

To use the join function from the Lodash library in TypeScript, you first need to install the library and import it into your TypeScript file. You can do this with the following command:

npm install lodash
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Then, in your TypeScript file, import the join function from Lodash:

index.ts
import { join } from 'lodash';
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Now, you can use the join function on an array. The join function takes two arguments: the array to join and the separator to use between the elements. Here's an example that uses the join function to combine the elements of an array into a comma-separated string:

index.ts
const array = ['one', 'two', 'three'];
const separator = ', ';
const result = join(array, separator);
console.log(result); // "one, two, three"
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You can also use a generic type parameter to indicate the type of the resulting string if you need to specify the output type:

index.ts
const array = [1, 2, 3];
const separator = '-';
const result = join<number>(array, separator); // the output type is string
console.log(result); // "1-2-3"
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