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2015年11月7日
SQL Interview Question
摘要： 面试的时候发现会问一些SQL的基本问题，在此总结一下。ProgramInterview/SQL这个网站上的问题还比较全。1. Join typeINNER JOIN: Returns all rows when there is at least one match in BOTH tablesLE... 阅读全文
posted @ 2015-11-07 02:12 树獭君 阅读(208) 评论(0) 推荐(0)
Populating Next Right Pointers in Each Node II 解答
摘要： QuestionFollow up for problem "Populating Next Right Pointers in Each Node".What if the given tree could be any binary tree? Would your previous solut... 阅读全文
posted @ 2015-11-07 00:10 树獭君 阅读(157) 评论(0) 推荐(0)
2015年11月6日
Divide Two Integers 解答
摘要： QuestionDivide two integers without using multiplication, division and mod operator.If it is overflow, return MAX_INT.Solutiondividend = divisor * quo... 阅读全文
posted @ 2015-11-06 05:26 树獭君 阅读(142) 评论(0) 推荐(0)
HashMap Java Doc
摘要： 原文public class HashMapextends AbstractMapimplements Map, Cloneable, Serializable1.Hash table based implementation of theMapinterface. This implementat... 阅读全文
posted @ 2015-11-06 03:31 树獭君 阅读(300) 评论(0) 推荐(0)
What’s the difference between an interface and an abstract class in Java?
摘要： 原文What’s the difference between an interface and an abstract class in Java?It’s best to start answering this question with a brief definition of abstr... 阅读全文
posted @ 2015-11-06 03:22 树獭君 阅读(420) 评论(0) 推荐(0)
Copy Constructor in Java
摘要： Reference: TutorialPoints, GeekforGeeksThecopy constructoris a constructor which creates an object by initializing it with an object of the same class... 阅读全文
posted @ 2015-11-06 03:06 树獭君 阅读(711) 评论(0) 推荐(0)
2015年11月5日
4Sum 解答
摘要： QuestionGiven an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the... 阅读全文
posted @ 2015-11-05 22:56 树獭君 阅读(215) 评论(0) 推荐(0)
Reverse Nodes in k-Group 解答
摘要： QuestionGiven a linked list, reverse the nodes of a linked listkat a time and return its modified list.If the number of nodes is not a multiple ofkthe... 阅读全文
posted @ 2015-11-05 21:59 树獭君 阅读(115) 评论(0) 推荐(0)
Swap Nodes in Pairs 解答
摘要： QuestionGiven a linked list, swap every two adjacent nodes and return its head.For example,Given1->2->3->4, you should return the list as2->1->4->3.Yo... 阅读全文
posted @ 2015-11-05 11:31 树獭君 阅读(171) 评论(0) 推荐(0)
Sum Root to Leaf Numbers 解答
摘要： QuestionGiven a binary tree containing digits from0-9only, each root-to-leaf path could represent a number.An example is the root-to-leaf path1->2->3w... 阅读全文
posted @ 2015-11-05 09:09 树獭君 阅读(171) 评论(0) 推荐(0)
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