php arrary_push
时间: 2023-09-09 11:06:03 浏览: 53
array_push() is a PHP function used to add one or more elements to the end of an array. It takes two arguments, the first being the array to which the elements are to be added, and the second being the element(s) to add.
Syntax:
```
array_push(array $array, mixed $value1, mixed $value2 =?): int
```
- $array: Required. Specifies the array to which the element(s) will be added.
- $value1, $value2, …: Required. Specifies the element(s) to add to the array.
Example:
```
$fruits = array("apple", "orange", "banana");
array_push($fruits, "mango", "grapes");
print_r($fruits);
```
Output:
```
Array
(
[0] => apple
[1] => orange
[2] => banana
[3] => mango
[4] => grapes
)
```
相关问题
Arrary.sort
Arrays.sort()是用于给数组排序的方法。默认情况下,它按照顺序排序,即从小到大。例如,给定一个整数数组arr = {9, 8, 7, 2, 3, 4, 1, 0, 6, 5},使用Arrays.sort(arr)方法后,数组会按照从小到大的顺序排序,输出结果为0123456789。
如果想要进行逆序排序,可以使用Comparator进行排序。例如,给定一个整数数组a = {2, 5, 4, 3, 1, 8},使用Arrays.sort(a)方法后,数组会按照从小到大的顺序排序,输出结果为[1, 2, 3, 4, 5, 8]。
另外,如果想要对多维数组进行排序,可以使用Arrays.sort()方法的重载形式。例如,给定一个二维整数数组nums = {{1, 3}, {1, 2}, {4, 5}, {3, 7}},使用Arrays.sort(nums, 2, 4, new Comparator<int[]>())方法后,数组nums会按照自定义的比较器进行排序。在这个比较器中,我们首先比较第一列的元素,如果相等,则比较第二列的元素。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
#### 引用[.reference_title]
- *1* [java-------Arrary.sort 用 Comparator比较器定制排序方式(例如逆序)](https://blog.csdn.net/u014453898/article/details/114681085)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *2* *3* [Array.sort用法](https://blog.csdn.net/qq_47455973/article/details/122810652)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
[ .reference_list ]
arrary 转list
数组转List可以使用Java中的Arrays.asList()方法或者List的toArray()方法实现。具体方法如下:
1. 使用Arrays.asList()方法:
代码示例:
```
List<String> listA = Arrays.asList("dog", "cat", "cow");
String[] strs = {"dog", "cat", "cow"};
List<String> listB = Arrays.asList(strs);
```
注意:Arrays.asList()方法返回的List是Arrays的内部类,对List的操作仍然反映在原数组上,因此这个List是定长的,不支持add、remove操作。
2. 使用List的toArray()方法:
代码示例:
```
List<String> list = new ArrayList<>();
list.add("dog");
list.add("cat");
list.add("cow");
String[] animals = list.toArray(new String[0]);
for (String animal : animals) {
System.out.println(animal);
}
```
注意:List的toArray()方法需要传入一个类型相同的数组作为参数,如果传入的数组长度小于List的长度,则会创建一个新的数组并返回。如果传入的数组长度大于或等于List的长度,则会将List中的元素复制到传入的数组中并返回。