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Add build script for Swift.

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krahets
2023-02-08 20:30:05 +08:00
parent 05f0054005
commit 38751cc5f5
25 changed files with 128 additions and 1223 deletions
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127
docs/chapter_computational_complexity/time_complexity.md
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@ -868,15 +868,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 常数阶 */
func constant(n: Int) -> Int {
var count = 0
let size = 100000
for _ in 0 ..< size {
count += 1
}
return count
}
[class]{}-[func]{constant}
```
=== "Zig"
@ -971,14 +963,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 线性阶 */
func linear(n: Int) -> Int {
var count = 0
for _ in 0 ..< n {
count += 1
}
return count
}
[class]{}-[func]{linear}
```
=== "Zig"
@ -1078,15 +1063,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 线性阶（遍历数组） */
func arrayTraversal(nums: [Int]) -> Int {
var count = 0
// 循环次数与数组长度成正比
for _ in nums {
count += 1
}
return count
}
[class]{}-[func]{arrayTraversal}
```
=== "Zig"
@ -1191,17 +1168,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 平方阶 */
func quadratic(n: Int) -> Int {
var count = 0
// 循环次数与数组长度成平方关系
for _ in 0 ..< n {
for _ in 0 ..< n {
count += 1
}
}
return count
}
[class]{}-[func]{quadratic}
```
=== "Zig"
@ -1341,24 +1308,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 平方阶（冒泡排序） */
func bubbleSort(nums: inout [Int]) -> Int {
var count = 0 // 计数器
// 外循环：待排序元素数量为 n-1, n-2, ..., 1
for i in sequence(first: nums.count - 1, next: { $0 > 0 + 1 ? $0 - 1 : nil }) {
// 内循环：冒泡操作
for j in 0 ..< i {
if nums[j] > nums[j + 1] {
// 交换 nums[j] 与 nums[j + 1]
let tmp = nums[j]
nums[j] = nums[j + 1]
nums[j + 1] = tmp
count += 3 // 元素交换包含 3 个单元操作
}
}
}
return count
}
[class]{}-[func]{bubbleSort}
```
=== "Zig"
@ -1485,20 +1435,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 指数阶（循环实现） */
func exponential(n: Int) -> Int {
var count = 0
var base = 1
// cell 每轮一分为二，形成数列 1, 2, 4, 8, ..., 2^(n-1)
for _ in 0 ..< n {
for _ in 0 ..< base {
count += 1
}
base *= 2
}
// count = 1 + 2 + 4 + 8 + .. + 2^(n-1) = 2^n - 1
return count
}
[class]{}-[func]{exponential}
```
=== "Zig"
@ -1594,13 +1531,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 指数阶（递归实现） */
func expRecur(n: Int) -> Int {
if n == 1 {
return 1
}
return expRecur(n: n - 1) + expRecur(n: n - 1) + 1
}
[class]{}-[func]{expRecur}
```
=== "Zig"
@ -1698,16 +1629,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 对数阶（循环实现） */
func logarithmic(n: Int) -> Int {
var count = 0
var n = n
while n > 1 {
n = n / 2
count += 1
}
return count
}
[class]{}-[func]{logarithmic}
```
=== "Zig"
@ -1799,13 +1721,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 对数阶（递归实现） */
func logRecur(n: Int) -> Int {
if n <= 1 {
return 0
}
return logRecur(n: n / 2) + 1
}
[class]{}-[func]{logRecur}
```
=== "Zig"
@ -1907,17 +1823,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 线性对数阶 */
func linearLogRecur(n: Double) -> Int {
if n <= 1 {
return 1
}
var count = linearLogRecur(n: n / 2) + linearLogRecur(n: n / 2)
for _ in 0 ..< Int(n) {
count += 1
}
return count
}
[class]{}-[func]{linearLogRecur}
```
=== "Zig"
@ -2032,18 +1938,7 @@ $$
=== "Swift"
```swift title="time_complexity.swift"
/* 阶乘阶（递归实现） */
func factorialRecur(n: Int) -> Int {
if n == 0 {
return 1
}
var count = 0
// 从 1 个分裂出 n 个
for _ in 0 ..< n {
count += factorialRecur(n: n - 1)
}
return count
}
[class]{}-[func]{factorialRecur}
```
=== "Zig"