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196 lines
1.9 KiB
Markdown
196 lines
1.9 KiB
Markdown
## 位操作扩展函数
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### 1. &
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> 位与运算。
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----------------------------
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#### 原型
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```
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n1 & n2
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```
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#### 示例
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```
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print(1 & 1)
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```
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### 2. |
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> 位或运算。
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----------------------------
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#### 原型
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```
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1|2
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```
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### 示例
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```
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print(|(1, 2))
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```
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### 3.~
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> 按位取反运算。
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----------------------------
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#### 原型
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```
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~(n1)
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```
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#### 示例
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```
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print(~1)
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```
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### 4.^
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> 异或运算。
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----------------------------
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#### 原型
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```
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n1^n2
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```
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#### 示例
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```
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print(n1^n2)
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```
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### 5. <<
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> 左移
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----------------------------
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#### 原型
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```
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n1<<n2
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```
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#### 示例
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```
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print(n1<<n2)
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```
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### 6. >>
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> 右移
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----------------------------
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#### 原型
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```
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n1>>n2
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```
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#### 示例
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```
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print(n1>>n2)
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```
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### 7. bit_get
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> 获取指定的位
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----------------------------
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#### 原型
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```
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bit_get(n1, n2) => bool
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```
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#### 示例
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```
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print(bit_get(0b1010, 1))
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```
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### 8. bit_set
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> 设置指定的位
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----------------------------
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#### 原型
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```
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bit_set(n1, n2) => value
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```
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#### 示例
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```
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print(bit_set(0b1010, 0))
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```
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### 9. bit_clear
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> 清除指定的位
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----------------------------
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#### 原型
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```
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bit_clear(n1, n2) => value
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```
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#### 示例
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```
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print(bit_clear(0b1010, 1))
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```
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### 10. bit_toggle
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> 取反指定的位
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----------------------------
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#### 原型
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```
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bit_toggle(n1, n2) => value
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```
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#### 示例
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```
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print(bit_toggle(0b1010, 1))
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```
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### 更多示例
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```js
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assert(bit_clear(0b0111, 1) == 0b0101)
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assert(bit_clear(0b0111, 0) == 0b0110)
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assert(bit_set(0b0, 0) == 0b1)
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assert(bit_set(0b0, 1) == 0b10)
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assert(bit_set(0b0, 2) == 0b100)
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assert(bit_toggle(0b000, 0) == 0b1)
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assert(bit_toggle(0b111, 1) == 0b101)
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assert(bit_toggle(0b101, 2) == 0b1)
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assert(bit_get(0b0111, 0))
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assert(bit_get(0b0111, 1))
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assert(!bit_get(0b0011, 2))
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assert((1<<1) == 2)
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assert((1<<2) == 4)
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assert((1<<8) == 256)
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assert(((0xf0112233 >> 24) & 0xff) == 0xf0)
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```
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