从foreach循环创建字符串

var array = [1, 2, 3, 4, 5];
var result = "";

array.forEach(function(element) {
  result += element.toString();
});

console.log(result); // 输出：12345

int[] array = {1, 2, 3, 4, 5};
StringBuilder result = new StringBuilder();

for (int element : array) {
  result.append(element);
}

System.out.println(result.toString()); // 输出：12345

array = [1, 2, 3, 4, 5]
result = ''.join(str(element) for element in array)

print(result) # 输出：12345

$array = array(1, 2, 3, 4, 5);
$result = "";

foreach ($array as $element) {
  $result .= strval($element);
}

echo $result; // 输出：12345