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https://github.com/yuanyu90221/to_lower_case
https://github.com/yuanyu90221/to_lower_case
Last synced: 16 days ago
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- Host: GitHub
- URL: https://github.com/yuanyu90221/to_lower_case
- Owner: yuanyu90221
- Created: 2020-08-17T16:36:16.000Z (over 4 years ago)
- Default Branch: master
- Last Pushed: 2020-08-17T16:36:47.000Z (over 4 years ago)
- Last Synced: 2024-04-21T14:01:33.669Z (9 months ago)
- Language: Go
- Size: 1.95 KB
- Stars: 0
- Watchers: 3
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
# to-lower-case
## 題目解讀：
### 題目來源:
[to-lower-case](https://leetcode.com/problems/to-lower-case/)
### 原文:
Implement function ToLowerCase() that has a string parameter str, and returns the same string in lowercase.
### 解讀：
實做ToLowerCase這個function
把所有輸入的字串 轉成小寫的形式輸出
## 初步解法:
### 初步觀察:
每個character都是一個hex code的形式儲存
因此 只要對於每個輸入的 character檢查範圍
是否在 'A' ~ 'Z'的range之內
就知道是否 是Capitcal character
然後只要 把每個 大寫的character 加上 offset of 'a'-'A'
就可以轉換成大寫
### 初步設計:
Given a string s
Step 0: let a integer index = 0, a string result = ""
Step 1: if index > length of s go to step 4
Step 2: if s[index] >= 'A' and s['index'] <= Z set result += string(s[index]+'a'-'A') else set result += string(s[index])
Step 3: index = index + 1 go to step 1
Step 4: return result
## 遇到的困難
### 題目上理解的問題
因為英文不是筆者母語
所以在題意解讀上 容易被英文用詞解讀給搞模糊
### pseudo code撰寫
一開始不習慣把pseudo code寫下來
因此 不太容易把自己的code做解析
### golang table driven test不熟
對於table driven test還不太熟析
所以對於寫test還是耗費不少時間
## 我的github source code
```golang
package to_lower_case
func toLowerCase(str string) string {
offset := 'a' - 'A'
result := ""
for _, r := range str {
if r >= 'A' && r <= 'Z' {
result += string(r + offset)
} else {
result += string(r)
}
}
return result
}
```
## 測資的撰寫
```golang
package to_lower_case
import "testing"
func Test_toLowerCase(t *testing.T) {
type args struct {
str string
}
tests := []struct {
name string
args args
want string
}{
{
name: "Example1",
args: args{
str: "Hello",
},
want: "hello",
},
{
name: "Example2",
args: args{
str: "here",
},
want: "here",
},
{
name: "Example3",
args: args{
str: "LOVELY",
},
want: "lovely",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := toLowerCase(tt.args.str); got != tt.want {
t.Errorf("toLowerCase() = %v, want %v", got, tt.want)
}
})
}
}
```
## my self record
[golang leetcode 30day 21th day](https://hackmd.io/3Z72DVlTTtq_y8zSj6jHeQ?view)
## 參考文章
[golang test](https://ithelp.ithome.com.tw/articles/10204692)