javascript 遍歷 array

由於 d3js 使用到大量的 array, 需要用到 array 內容的轉換，所以來學習如何遍歷 array.

解法：
https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Array/forEach

const array1 = ['a', 'b', 'c'];

array1.forEach((element) => console.log(element));

// Expected output: "a"
// Expected output: "b"
// Expected output: "c"

Java 世界遍歷 list 解法：

List<String> list = new ArrayList<>();
list.add("java");
list.add("C");
list.add("C++");
list.add("C#");
list.add("PHP");

/*
 * 一般for迴圈
 */
for (int i = 0; i < list.size(); i++) {
    System.out.println("一般for迴圈：" + list.get(i));
}

/*
 * 增強for迴圈
 */
for (String str : list) {
    System.out.println("增強for迴圈：" + str);
}

/*
 * 迭代器1遍歷
 */
for (Iterator<String> it = list.iterator(); it.hasNext();) {
    System.out.println("迭代器1遍歷：" + it.next());
}

/*
 * 迭代器2遍歷
 */
Iterator<String> it = list.iterator();
while (it.hasNext()) {
    System.out.println("迭代器2遍歷：" + it.next());
}

/*
 * java8 Lambda表示式
 */
list.forEach(s -> {
    System.out.println("java8 Lambda表示式：" + s);
});

/*
 * java8 stream 有序流
 */
list.stream().forEach(s -> {
    System.out.println("java8 stream 有序流：" + s);
});

/*
 * java8 stream 並行流
 */
list.parallelStream().forEach(s -> {
    System.out.println("java8 stream 並行流：" + s);
});