2021-01-14 10:00:45 +08:00
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## array 扩展函数
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2021-07-15 15:28:41 +08:00
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array 是一个通用的数组,里面可以放混合数据类型的数据。
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2021-01-14 10:00:45 +08:00
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array 有以下属性:
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* size 元素的个数
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* capacity 元素的最大个数
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### 1.array\_create
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> 创建 array 对象。
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----------------------------
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#### 原型
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```js
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array_create() => object
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```
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2021-07-15 15:28:41 +08:00
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### 2.array\_create\_with\_str
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> 创建 array 对象。以指定的分隔符把字符串拆开,并转换为指定类型的数据,放入数组中。
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----------------------------
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#### 原型
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```js
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2021-09-09 15:10:12 +08:00
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array_create_with_str(str, sep, type) => object
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2021-07-15 15:28:41 +08:00
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```
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type 为可选参数,可选取值为:
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* int 表示整数。
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* double 表示浮点数。
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* 其它或默认为字符串。
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示例:
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```
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a = array_create_with_str("2,1,3", ",", "int");
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a = array_create_with_str("a2,a1,a3", ",");
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```
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2021-09-09 15:10:12 +08:00
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### 3.array\_create\_repeated
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2021-07-15 15:28:41 +08:00
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> 创建 array 对象。
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----------------------------
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#### 原型
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```js
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2021-07-17 09:58:02 +08:00
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array_create_repeated(value, nr) => object
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2021-07-15 15:28:41 +08:00
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```
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* value 为初始化的值。
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* nr 为值的个数。
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示例:
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```
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2021-07-17 09:58:02 +08:00
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a = array_create_repeated(123, 3);
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2021-07-15 15:28:41 +08:00
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```
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### 4.array\_dup
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> 创建 array 对象。
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----------------------------
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#### 原型
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```js
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2021-09-09 15:10:12 +08:00
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array_dup(arr, start, end) => object
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2021-07-15 15:28:41 +08:00
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```
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start 为开始的位置,默认为 0。
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2021-07-16 11:52:59 +08:00
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end 为结束的位置(不包含)
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2021-07-15 15:28:41 +08:00
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示例:
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```
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a = array_create_with_str("2,1,3", ",", "int");
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b = array_dup(a);
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c = array_dup(a, 1);
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d = array_dup(a, 1, 2);
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```
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### 5.array\_push
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2021-01-14 10:00:45 +08:00
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> 追加一个或多个数据。
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----------------------------
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#### 原型
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```js
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array_push(array, v, ...) => uint32_t
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```
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> 返回写入数据的个数
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2021-07-15 15:28:41 +08:00
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### 6.array\_pop
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2021-01-14 10:00:45 +08:00
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> 弹出最后一个元素
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----------------------------
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#### 原型
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```js
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array_pop(array) => value
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```
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2021-07-15 15:28:41 +08:00
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### 7.array\_shift
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> 弹出第一个元素
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----------------------------
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#### 原型
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```js
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array_shift(array) => value
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```
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### 8.array\_get
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2021-01-14 10:00:45 +08:00
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> 获取指定位置的元素
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----------------------------
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#### 原型
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```js
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array_get(array, index) => value
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```
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2021-07-15 15:28:41 +08:00
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> index 为负数时,从后往前取。比如-1 表示最后一个元素。
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2021-09-09 15:10:12 +08:00
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>
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> 此外,也可以通过 array.[index] 的方式访问数组元素。
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2021-07-14 10:28:54 +08:00
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2021-07-15 15:28:41 +08:00
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### 9.array\_set
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2021-01-14 10:00:45 +08:00
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> 修改指定位置的元素
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----------------------------
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#### 原型
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```js
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array_set(array, index, value) => bool
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```
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2021-07-15 15:28:41 +08:00
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> index 为负数时,从后往前取。比如-1 表示最后一个元素。
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2021-07-14 10:28:54 +08:00
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2021-07-15 15:28:41 +08:00
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### 10.array\_insert
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2021-01-14 10:00:45 +08:00
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> 插入元素到指定位置
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----------------------------
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#### 原型
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```js
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array_insert(array, index, value) => bool
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```
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2021-07-15 15:28:41 +08:00
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> index 为负数时,从后往前取。比如-1 表示最后一个元素。
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### 11.array\_index\_of
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> 获取元素首次出现的位置。
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----------------------------
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#### 原型
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```js
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2021-09-09 15:10:12 +08:00
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array_index_of(array, value) => index
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2021-07-15 15:28:41 +08:00
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```
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### 12.array\_last_index\_of
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> 获取元素最后出现的位置。
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----------------------------
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#### 原型
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```js
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2021-09-09 15:10:12 +08:00
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array_last_index_of(array, value) => index
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2021-07-15 15:28:41 +08:00
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```
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### 13.array\_remove
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2021-01-14 10:00:45 +08:00
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> 删除指定位置的元素
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----------------------------
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#### 原型
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```js
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array_remove(array, index) => bool
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```
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2021-07-15 15:28:41 +08:00
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> index 为负数时,从后往前取。比如-1 表示最后一个元素。
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### 14.array\_get\_and\_remove(
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> 删除指定位置的元素,并返回改元素。
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----------------------------
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#### 原型
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```js
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2021-09-09 15:10:12 +08:00
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array_get_and_remove(array, index) => value
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```
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> index 为负数时,从后往前取。比如-1 表示最后一个元素。
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### 15.array\_clear
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> 删除全部元素
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----------------------------
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#### 原型
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```js
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array_clear(array) => bool
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```
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2021-07-15 15:28:41 +08:00
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### 16.array\_join
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> 连接全部元素成一个字符串。
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----------------------------
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#### 原型
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```js
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array_join(array, sep) => str
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```
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2021-07-15 15:28:41 +08:00
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### 17.array\_sort
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> 根据当前的数据类型排序,以第一个元素类型为准。
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----------------------------
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#### 原型
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```js
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array_sort(array, ascending, ignore_case) => bool
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```
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* ascending 是否为升序,默认是。
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* ignore_case 是否忽略大小写,仅用于字符串,默认为否。
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示例:
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```
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a = array_create_with_str("2,1,3", ",", "int");
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assert(array_sort(a));
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d = array_join(a, ":");
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assert(d == "1:2:3")
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assert(array_sort(a, false));
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d = array_join(a, ":");
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assert(d == "3:2:1")
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```
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2021-07-16 11:52:59 +08:00
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### 18.array\_min
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> 获取最小值。
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----------------------------
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#### 原型
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```js
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array_min(array) => double
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```
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### 19.array\_max
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> 获取最大值。
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----------------------------
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#### 原型
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```js
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array_max(array) => double
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```
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### 20.array\_avg
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> 求平均值。
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----------------------------
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#### 原型
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```js
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array_avg(array) => double
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```
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### 21.array\_sum
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> 求和。
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----------------------------
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#### 原型
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```js
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array_sum(array) => double
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```
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2021-07-17 09:49:10 +08:00
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### 22.array\_clone\_and\_sort
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> clone一份数据,根据当前的数据类型排序,以第一个元素类型为准。
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----------------------------
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#### 原型
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```js
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array_clone_and_sort(array, ascending, ignore_case) => array
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```
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* ascending 是否为升序,默认是。
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* ignore_case 是否忽略大小写,仅用于字符串,默认为否。
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示例:
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```
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a = array_create_with_str("2,1,3", ",", "int");
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b = array_clone_and_sort(a));
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d = array_join(b, ":");
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assert(d == "1:2:3")
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```
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2021-01-14 10:00:45 +08:00
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### 更多示例
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```js
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a = array_create()
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assert(array_push(a,1,2,3) == 3)
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assert(array_push(a,"a","b","c") == 3)
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assert(array_pop(a), "c")
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assert(array_pop(a), "b")
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assert(array_pop(a), "a")
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assert(array_pop(a), "3")
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assert(array_pop(a), "2")
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assert(array_pop(a), "1")
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assert(value_is_valid(array_pop(a)))
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assert(array_clear(a))
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assert(a.size == 0)
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assert(array_insert(a, 0, 'a'))
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assert(array_insert(a, 1, 'b'))
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assert(array_insert(a, 2, 'c'))
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assert(array_insert(a, 3, 'd'))
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|
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|
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assert(a.size == 4)
|
|
|
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assert(array_remove(a, 0))
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assert(array_get(a, 0) == 'b')
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|
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|
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assert(array_set(a, 0, 'bbb'))
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|
|
|
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assert(array_get(a, 0) == 'bbb')
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assert(array_set(a, 0, 'b'))
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|
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assert(array_get(a, 1) == 'c')
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|
|
|
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assert(array_set(a, 1, 'ccc'))
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|
|
|
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assert(array_get(a, 1) == 'ccc')
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|
|
|
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assert(array_set(a, 1, 'c'))
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|
|
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assert(array_join(a, ',') == 'b,c,d')
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|
|
|
|
print(a.size, a.capacity)
|
|
|
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```
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