小鑫分享:go语言数组的遍历

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思维导图

Mind mapping

1. 使用for循环和索引

1. Use for loops and indexes

最直接且常见的方法是使用for循环和索引来遍历数组。这种方法提供了对数组每个元素的精确控制，包括访问元素的索引和值。在这个例子中，for循环从0开始，直到数组的长度len(arr)，每次循环递增索引i。通过这种方式，可以访问数组的每个元素，并打印出它们的索引和值。这种方法非常适合需要同时访问元素索引和值的场景。

The most direct and common method is to use for loops and indexes to traverse arrays. This method provides precise control over each element of the array, including accessing the index and value of the element. In this example, the for loop starts from 0 and increments the index i each time until the length of the array len (arr) is reached. Through this method, each element of the array can be accessed and their indices and values can be printed out. This method is very suitable for scenarios where both element indexes and values need to be accessed simultaneously.

2. 使用for range循环

2. Use the for range loop

for range是Go语言提供的一种更简洁的遍历数组的方法。它隐式地处理索引，允许开发者只关注数组的值（或同时关注值和索引）。for range循环会迭代数组的每个元素，同时返回元素的索引和值。这使得代码更加简洁和易读，特别是在只需要访问值而不需要索引时，可以只接收值参数：

For range is a more concise method provided by the Go language for traversing arrays. It implicitly handles indexes, allowing developers to focus only on the values of the array (or on both values and indexes). The for range loop iterates over each element of the array while returning the index and value of the element. This makes the code more concise and easy to read, especially when only accessing values without indexes, it can only accept value parameters:

3. 使用指针和手动遍历

3. Use pointers and manual traversal

虽然不如前两种方法常用，但使用指针和手动遍历数组在某些低级编程或性能优化的场景中可能是必要的。这种方法提供了对数组内存布局的完全控制。通过unsafe包获取数组的指针，并手动计算每个元素的地址来访问它们。这种方法虽然强大，但风险较高，因为不正确地使用unsafe包可能导致未定义行为或程序崩溃。因此，除非有充分的理由和明确的需求，否则不推荐使用这种方法遍历数组。

Although not as commonly used as the previous two methods, using pointers and manually traversing arrays may be necessary in some low-level programming or performance optimization scenarios. This method provides complete control over the array memory layout. Retrieve pointers to arrays through the unsafe package and manually calculate the addresses of each element to access them. Although this method is powerful, it carries a higher risk as improper use of unsafe packages may result in undefined behavior or program crashes. Therefore, unless there are sufficient reasons and clear requirements, it is not recommended to use this method to traverse arrays.

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部分参考内容来自百度

翻译来源：谷歌翻译