how to use the inject function from the underscore library in javascript

The inject() function in Underscore.js is used to reduce an array into a single value by iterating over each element and applying an operation on the current element and an accumulator value (that starts with an initial value) and returning the result. The inject() function is also known as reduce() in JavaScript.

Here is the syntax of inject() function:

index.tsx
_.inject(list, iterator, memo, context)
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• list: The array to iterate over.
• iterator: The function called on each element to combine it with the memo.
• memo: The initial value of the memo.
• context: The optional context for the iterator function.

Here's an example of how to use the inject() function:

index.tsx
const numbers = [1, 2, 3, 4, 5];

const sum = _.inject(numbers, (memo, num) => memo + num, 0);

console.log(sum); // 15
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In this example, we have an array of numbers that we will reduce into a single value that represents the sum of all the numbers in the array. We pass in a function that adds the current element to the accumulator and returns the result. We also pass in an initial value of zero for the memo.

The result of this operation is stored in the sum variable, which we log to the console.

That's how you can use the inject() function from the Underscore.js library in JavaScript.