如何在JavaScript中的數字數組中找到最小值

要找到數組中的最小值，最簡單的方法是使用Math.min() 與擴展運算符結合，例如Math.min(...numbers) 可直接返回最小值1；對於大數組應避免擴展運算符以防止棧溢出，改用numbers.reduce((min, current) => current

To find the minimum value in an array of numbers in JavaScript, you have several clean and effective options. Here are the most common and practical approaches:

Using Math.min() with the spread operator

The simplest and most readable way is to use Math.min() along with the spread operator ( ... ):

 const numbers = [5, 3, 9, 1, 7];
const minValue = Math.min(...numbers);
console.log(minValue); // Output: 1

This works well for small to moderately sized arrays. However, be cautious with very large arrays (eg, tens of thousands of elements), as spreading too many values can cause a "Maximum call stack size exceeded" error.

Using Math.min() with apply()

An older alternative that avoids the spread operator is using Function.prototype.apply() :

 const numbers = [5, 3, 9, 1, 7];
const minValue = Math.min.apply(null, numbers);
console.log(minValue); // Output: 1

This achieves the same result and works in older JavaScript environments, but it's largely outdated now that spread syntax is widely supported.

Using Array.prototype.reduce()

For more control or when working with custom logic, reduce() is a solid choice:

 const numbers = [5, 3, 9, 1, 7];
const minValue = numbers.reduce((min, current) => current < min ? current : min);
console.log(minValue); // Output: 1

This method is especially useful if you're already processing the array or need to handle edge cases manually.

Handling edge cases

If the array might be empty, always include a check:

 const numbers = [];
const minValue = numbers.length > 0 ? Math.min(...numbers) : null;
console.log(minValue); // Output: null

Returning null , undefined , or throwing an error depends on your use case.

Summary

• Use Math.min(...array) for simplicity and readability (best for small/medium arrays).
• Avoid spreading on very large arrays — use reduce() instead.
• Always consider empty arrays and handle them appropriately.

Basically, for most practical purposes, Math.min(...array) is the go-to solution.

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