June 9th, 2023
前提
大家應該都跟我一樣，經常使用 ChatGPT 來協助一些 coding 上的問題。尤其是對於 Regular Expression 的問題。最近在處理上發現，需要透過「正向表列」，而非跟他講哪些不可以的方向比較容易成功。也應該說， Regular Expression 本來就要透過正向表來才對。
原本:
// AddLineBreaksAroundURLs takes a string as input, finds URLs,
// and inserts a newline character before and after each URL.
// It returns the modified string.
func AddLineBreaksAroundURLs(input string) string {
re := regexp.MustCompile(`(https?:\/\/[^\s\p{Han}]+)`)
return re.ReplaceAllString(input, "\n$1\n")
}
發現無法處理：
https://voyager.minedojo.org/。
當我發現我一直跟 ChatGPT 講要排除 ` https://voyager.minedojo.org/。` 這個案例的時候，往往會一直卡住無法向前。 但是寫多個測試案例倒是真的蠻好的。
Unit Testing code
func TestAddLineBreaksAroundURLs(t *testing.T) {
tests := []struct {
input string
expected string
}{
{
input: "Check out this website https://example.com and this one http://another-example.com",
expected: "Check out this website \nhttps://example.com\n and this one \nhttp://another-example.com\n",
},
{
input: "Here is an URL with dot at the end https://voyager.minedojo.org/。",
expected: "Here is an URL with dot at the end \nhttps://voyager.minedojo.org/\n。",
},
{
input: "This is another test 可在https://voyager.minedojo.org/上訪問。",
expected: "This is another test 可在\nhttps://voyager.minedojo.org/\n上訪問。",
},
// Add more test cases here as needed
}
for _, tt := range tests {
res := AddLineBreaksAroundURLs(tt.input)
assert.Equal(t, tt.expected, res, "Should correctly insert line breaks around URLs")
}
}
正面表列
後來決定，透過正面表列來解決這個問題。
// AddLineBreaksAroundURLs takes a string as input, finds URLs,
// and inserts a newline character before and after each URL.
// It returns the modified string.
func AddLineBreaksAroundURLs(input string) string {
re := regexp.MustCompile(`(https?:\/\/[\w\/\?\&\.\-]+)`)
matches := re.FindAllString(input, -1)
for _, match := range matches {
input = strings.Replace(input, match, "\n" + match + "\n", 1)
}
return input
}
大家可以透過以下方式分享 ChatGPT link
