vasanthk

System Design Cheatsheet

Picking the right architecture = Picking the right battles + Managing trade-offs

Basic Steps

1. Clarify and agree on the scope of the system

• User cases (description of sequences of events that, taken together, lead to a system doing something useful)
  • Who is going to use it?
  • How are they going to use it?

ElninoFong

public class Solution {
    public int reverse(int x) {
        int res = 0;
        while (x != 0) {
            // handle overflow/underflow
            if (Math.abs(res) > Integer.MAX_VALUE / 10) {
                return 0;
            }
            res = res * 10 + x % 10;
            x /= 10;

ElninoFong

/**
 * Definition for singly-linked list.
 * public class ListNode {
 *     int val;
 *     ListNode next;
 *     ListNode(int x) {
 *         val = x;
 *         next = null;
 *     }
 * }

rxaviers

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