loop Array

Single element

易读性

尽量用自带的处理数组的解构 why: focus on the element

JavaScript’s forEach() method on arrays can provide both the element and its index:

const elements = ['a', 'b', 'c', 'd'];
elements.forEach((element, index) => {
    console.log(`${index}: ${element}`);
});

Python

In Python, you can use the enumerate() function to get both the index and the value when iterating:

elements = ['a', 'b', 'c', 'd']
for index, element in enumerate(elements):
    print(f"{index}: {element}")

Java

String[] elements = {"a", "b", "c", "d"};
int index = 0;
for (String element : elements) {
    System.out.println(index + ": " + element);
    index++;
}

Consecutive elements

handle consecutive elements

1. Python

Python provides a simple and clear way to iterate through pairs of consecutive items using a combination of zip with slicing:

pythonCopy code
elements = [1, 2, 3, 4, 5]
for current, next_item in zip(elements, elements[1:]):
    print(f"Current: {current}, Next: {next_item}")

This method is elegant and takes advantage of Python's powerful slicing and iteration capabilities.

2. JavaScript

In JavaScript, you can use a traditional for loop to handle consecutive elements since JavaScript does not have built-in tuple unpacking or a direct equivalent to Python's zip:

javascriptCopy code
const elements = [1, 2, 3, 4, 5];
for (let i = 0; i < elements.length - 1; i++) {
    console.log(`Current: ${elements[i]}, Next: ${elements[i + 1]}`);
}

This approach is straightforward and efficient, suitable for most cases where you need to process elements in pairs.

3. Java

Java typically uses a traditional for loop for such tasks:

javaCopy code
int[] elements = {1, 2, 3, 4, 5};
for (int i = 0; i < elements.length - 1; i++) {
    System.out.println("Current: " + elements[i] + ", Next: " + elements[i + 1]);
}

This method is universally applicable in Java for any array or list where you need to access consecutive elements.

迭代器模式

感觉很受用

微服务等软件架构
https://crimsonromance.github.io/2019/03/23/四种软件架构：单体架构、分布式架构、微服务架构、Serverless架构/