For the purpose of this problem, we will return 0 when needle is an empty string. This is consistent to C’sstrstr() and Java’sindexOf(). strStr() implementation in C++ The implementation should consider the corner cases, when the needle is empty, the result should be always 0. The ...
Implementation ofSTRSTRinglibc(string/strstr.c): /* Return the first occurrence of NEEDLE in HAYSTACK. Return HAYSTACK if NEEDLE is empty, otherwise NULL if NEEDLE is not found in HAYSTACK. */char*STRSTR(constchar*haystack_start,constchar*needle_start){constchar*haystack = haystack_start;constc...
Clarification Do I need to implement KMP Algorithm in a real interview? Not necessary. When you meet this problem in a real interview, the interviewer may just want to test your basic implementation ability. But make sure you confirm with the interviewer first. 在面试中我是否需要实现KMP算法?
You may be interested to look at a strchr implementation using SSE2. In comparison with it, you carefully avoided the branch for the first misaligned chunk. Nice job! Sirmabus, 12 years ago Peter, related but a bit of the topic, have you ever went about optimizing pattern matching with a...
Clarification Do I need to implement KMP Algorithm in a real interview? Not necessary. When you meet this problem in a real interview, the interviewer may just want to test your basic implementation ability. But make sure your confirm with the interviewer first. ...
Write an efficient program to implement strstr function in C. The strstr() function returns a pointer to the first occurrence of a string in another string. The prototype of the strstr() is: const char* strstr(const char* X, const char* Y); 1. Iterative Implementation Following’s ...
1. Iterative Implementation (Naive) Here’s an iterative implementation of thestrstr(X, Y)function. It returns the index of the first occurrence ofYinXor-1ifYis not part ofX. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17