Finding the minimum value in a list and the maximum value in JavaScript

Question

Finding the minimum value in a list and the maximum value in JavaScript

My current JavaScript list consists of dollar coin values:

let x = [1.0, 2.5, 5.0, 20.0, 50.0, 100.0, 500.0, 2000.0, 5000.0]

My challenge is finding an equation in JavaScript that will allow me to use the smallest number of coins to reach the desired maximum value.

For instance, if I want to max out at 5.5 USD, I would need to use a 2.5 USD coin and three 1.0 USD coins to total 5.5 USD.

One important rule is that the total value must not exceed the desired amount.

Does anyone know of a specific mathematical function or equation type that can help me with this task?

javascript arrays

Answer 1

Answer №1

One must create their own logic for this task, as there are no readily available built-in functions to accomplish it easily. Try using the reduce method!

let a = [1.0, 2.5, 5.0, 20.0, 50.0, 100.0, 500.0, 2000.0, 5000.0];

let query = 80.0;

while (query > 0) {
  //finding the closest maximum number
  const output = a.filter(t => t <= query).reduce((prev, curr) => Math.abs(curr - query) < Math.abs(prev - query) ? curr : prev);

  query = query - output;
  console.log(output);
}

Answer 2

One must create their own logic for this task, as there are no readily available built-in functions to accomplish it easily. Try using the reduce method!

let a = [1.0, 2.5, 5.0, 20.0, 50.0, 100.0, 500.0, 2000.0, 5000.0];

let query = 80.0;

while (query > 0) {
  //finding the closest maximum number
  const output = a.filter(t => t <= query).reduce((prev, curr) => Math.abs(curr - query) < Math.abs(prev - query) ? curr : prev);

  query = query - output;
  console.log(output);
}

Finding the minimum value in a list and the maximum value in JavaScript

Answer №1

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