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28. Implement Strstr

Programming Python3

28. Implement strStr()

Easy

Implement strStr().

Given two strings needle and haystack, return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.

Clarification:

What should we return when needle is an empty string? This is a great question to ask during an interview.

For the purpose of this problem, we will return 0 when needle is an empty string. This is consistent to C's strstr() and Java's indexOf().

 

Example 1:

Input: haystack = "hello", needle = "ll"
Output: 2

Example 2:

Input: haystack = "aaaaa", needle = "bba"
Output: -1

 

Constraints:

  • 1 <= haystack.length, needle.length <= 104
  • haystack and needle consist of only lowercase English characters.

 class Solution:
    def strStr(self, haystack: str, needle: str) -> int:

        return haystack.find(needle)
Random note

𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻 𝗞𝗲𝘆 𝗖𝗼𝗻𝗰𝗲𝗽𝘁𝘀:

  1. Scalability: https://lnkd.in/gpge_z76
  2. Latency vs Throughput: https://lnkd.in/g_amhAtN
  3. CAP Theorem: https://lnkd.in/g3hmVamx
  4. ACID Transactions: https://lnkd.in/gMe2JqaF
  5. Rate Limiting: https://lnkd.in/gWsTDR3m
  6. API Design: https://lnkd.in/ghYzrr8q
  7. Strong vs Eventual Consistency: https://lnkd.in/gJ-uXQXZ
  8. Distributed Tracing: https://lnkd.in/d6r5RdXG
  9. Sync vs Async Communication: https://lnkd.in/gC3F2nvr
  10. Batch vs Stream Processing: https://lnkd.in/g4_MzM4s
  11. Fault Tolerance: https://lnkd.in/dVJ6n3wA

𝗦𝘆𝘀𝘁𝗲𝗺 𝗗𝗲𝘀𝗶𝗴𝗻 𝗕𝘂𝗶𝗹𝗱𝗶𝗻𝗴 𝗕𝗹𝗼𝗰𝗸𝘀:

  1. Database: https://lnkd.in/gti8gjpz
  2. Horizontal vs Vertical Scaling: https://lnkd.in/gAH2e9du
  3. Caching: https://lnkd.in/gC9piQbJ
  4. Distributed Caching: https://lnkd.in/g7WKydNg
  5. Load Balancing: https://lnkd.in/gQaa8sXK
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  8. Data Replication: https://lnkd.in/gVAJxTpS
  9. Data Redundancy: https://lnkd.in/gNN7TF7n
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  11. Database Indexes: https://lnkd.in/gCeshYVt
  12. Proxy Server: https://lnkd.in/gi8KnKS6
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𝗔𝗿𝗰𝗵𝗶𝘁𝗲𝗰𝘁𝘂𝗿𝗮𝗹 𝗣𝗮𝘁𝘁𝗲𝗿𝗻𝘀:

  1. Event-Driven Architecture: https://lnkd.in/dp8CPvey
  2. Client-Server Architecture: https://lnkd.in/dAARQYzq
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  4. Microservices Architecture: https://lnkd.in/gFXUrz_T

𝗟𝗼𝘄-𝗟𝗲𝘃𝗲𝗹 𝗗𝗲𝘀𝗶𝗴𝗻 𝗣𝗿𝗼𝗯𝗹𝗲𝗺𝘀:

  1. Design Parking Lot: https://lnkd.in/dQaAuFd2
  2. Design Splitwise: https://lnkd.in/dF5fBnex
  3. Design Chess Validator: https://lnkd.in/dfAQHvN4
  4. Design Distributed Queue | Kafka: https://lnkd.in/dQ6_B4_M

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