foreach循环也叫增强型的for循环，或者叫foreach循环。
foreach循环是JDK5.0的新特性（其他新特性比如泛型、自动装箱等）。
import java.util.Arrays;
public class Main {
public static void main(String[]...
找错：
#!/usr/bin/perl use warnings; use strict; sub message{ my $quant = $_; #这里$_是个无效值，改成$quant=shift或$_[0] my $mess; $mess = "$quant glasses of Lemon...
foreach
Another common necessity for dynamic SQL is the need to iterate over a collection, often to build an IN condition. For example:
<select id="selectPostIn" resultType="domain.blog.Post">...
1. 在循环时，使用 while 的效率要比 for 高，因此尽量采用 while 循环：
Array.prototype.myforEach = function (callback) {
let index = -1;
const length = this.length;
while (++index < length) {...
