这是我的代码
public static int[] MoveZeroes(int[] arr)
{
// TODO: Program me
int zeroCount = 0;
int[] temp = { };
int numberItems = 0;
foreach (var a in arr)
{
if (a == 0)
{
zeroCount += 1;
}
else
{
temp[numberItems] = a;
}
numberItems += 1;
}
return new int[] { };
}
我喜欢使用它
int[] f = MoveZeroes(new int[] {1, 2, 1, 1, 3, 1, 0, 0, 0, 0});
但这在行上给了我错误Index was outside the bounds of the array
temp[numberItems] = a;
如何添加数组中的项目？我在做什么错了？
答案 0 :(得分：1)
//some code above here
$x = 1;
while($row = $result->fetch_assoc()){
$uidcheck = mysqli_num_rows($result);
$catname = $row['name'];
$catrefno = $row['refno'];
echo '
<label class="container"><input type="radio" name="catname[]" id="catname'.$x.'" value="'.$catname.'"> '.$catname.'
<span class="checkmark"></span></label>
<div id="selectdiv'.$x.'"><select class="form-control itnames" name="itname[]" id="itname'.$x.'" required>
<option></option>';
$sql1 = "SELECT * FROM foodarea WHERE status!='deactive' and itcatname='$catname'";
$result1 = $conn->query($sql1);
$uidcheck1 = mysqli_num_rows($result1);
if ($uidcheck1 > 0){
while($row1 = $result1->fetch_assoc()){
$uidcheck1 = mysqli_num_rows($result1);
$itname = $row1['itname'];
echo '<option>'.$itname.'</option>';
}
}
echo '</select></div>
<script>document.getElementById("catname'.$x.'").onchange = function() {
var itnames = document.getElementById("selectdiv'.$x.'").innerHTML;
var selectarea = document.getElementById("selectarea");
selectarea.innerHTML = !this.checked ? "none" : itnames;
};</script>';
$x++;
}
}
echo '<div id="selectarea"></div>'
这将创建一个长度为0个元素的整数数组。您不能插入其中，因为它的长度为0。
使用int[] temp = { }，然后可以动态添加到其中：
List<int>