15 lines
396 B
Rust
15 lines
396 B
Rust
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pub fn str_str(haystack: String, needle: String) -> i32 {
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if needle.is_empty() {
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return 0;
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}
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haystack.find(&needle).map(|n| n as i32).unwrap_or(-1)
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}
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#[test]
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fn test_implement_strstr() {
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assert_eq!(str_str("hello".to_string(), "ll".to_string()), 2);
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assert_eq!(str_str("aaaaa".to_string(), "bba".to_string()), -1);
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assert_eq!(str_str("aaaaa".to_string(), "".to_string()), 0);
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}
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