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Refactor the section of bianry search.

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krahets
2023-05-21 04:51:32 +08:00
parent 921d87c238
commit c3e7455285
22 changed files with 76 additions and 161 deletions
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4
codes/swift/chapter_binary_search/binary_search.swift
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@ -11,7 +11,7 @@ func binarySearch(nums: [Int], target: Int) -> Int {
var j = nums.count - 1
// 循环，当搜索区间为空时跳出（当 i > j 时为空）
while i <= j {
let m = (i + j) / 2 // 计算中点索引 m
let m = i + (j - i) / 2 // 计算中点索引 m
if nums[m] < target { // 此情况说明 target 在区间 [m+1, j] 中
i = m + 1
} else if nums[m] > target { // 此情况说明 target 在区间 [i, m-1] 中
@ -31,7 +31,7 @@ func binarySearchLCRO(nums: [Int], target: Int) -> Int {
var j = nums.count
// 循环，当搜索区间为空时跳出（当 i = j 时为空）
while i < j {
let m = (i + j) / 2 // 计算中点索引 m
let m = i + (j - i) / 2 // 计算中点索引 m
if nums[m] < target { // 此情况说明 target 在区间 [m+1, j) 中
i = m + 1
} else if nums[m] > target { // 此情况说明 target 在区间 [i, m) 中