Micah Blog

Thinking will not overcome fear but action will.

Square Root of A Number -- Binary Search

Binary Search

Topic LeetCode 69: Sqrt(x) Idea x^2 = a can change to x^2-a = 0 question. The question to get the square root of the number a can convert to the question that to find a number x to make ...

Posted by Micah on December 6, 2018

rm -rf shell script practice

shell script

Topic Just a simple example for practice Idea input a full path, rm the specific file or folder Program #!/bin/ksh # PURPOSE # # This script will remove the specific fi...

Posted by Micah on December 5, 2018

HourRank 31 Save the Queen -- Binary Search

Binary Search

Topic HourRank 31: Save The Queen Details The kingdom of Zokoria is under attack! The invaders wish to capture the Queen and conquer Zokoria. Aware of the danger, Heldorf , the captain of th...

Posted by Micah on December 4, 2018

Insert A Node in A Sorted Doubly Linked List

Doubly Linked List

Topic Hackerrank Linked Lists: Inserting A Node Into Doubly Linked List Idea C++ solution. Doubly Linked List Basic Usage. Need to consider both previous and next nodes when insert a node...

Posted by Micah on November 12, 2018

Oracle Database PLSQL Fundamentals

Basic Stucture and Flow

Common Abbreviations Global SGA: System Global Area PGA: Program Global Area Database Language DML: data manipulation language (insert, delete, update, select) ...

Posted by Micah on November 6, 2018

Josephus Problem

Linked List and Recursion

Topic In computer science and mathematics, the Josephus Problem (or Josephus permutation) is a theoretical problem. Following is the problem statement: There are n people standing in a circle wai...

Posted by Micah on November 4, 2018

Palindrome Linked List

Slow and Fast Pointer

Topic Leetcode: Palindrome Linked List Idea C++ solution. Use slow and fast pointer, during the traversal: slow pointer takes one step and fast takes two steps slow pointer reverse its n...

Posted by Micah on November 2, 2018

Linked List Detect A Cycle

Slow and Fast Pointer

Topic Hackerrank Linked Lists: Detect A Cycle Idea C++ solution. Use slow and fast pointer, during the traversal, slow pointer takes one step and fast takes two steps. If there is a cyc...

Posted by Micah on October 31, 2018

从一道网易面试题浅谈 Tagged Pointer

浅谈 Tagged Pointer

前言 这篇博客九月就想写了，因为赶项目拖了到现在，抓住17年尾巴写吧~ 正文 上次看了一篇 《从一道网易面试题浅谈OC线程安全》 的博客，主要内容是： 作者去网易面试，面试官出了一道面试题：下面代码会发生什么问题？ @property (nonatomic, strong) NSString *target; //.... dispatch_queue_t queue = disp...

Posted by BY on December 26, 2017

为博客添加 Gitalk 评论插件

BY Blog 添加 Gitalk 的评论插件了

前言 由于 Disqus 对于国内网路的支持十分糟糕，很多人反映 Disqus 评论插件一直加载不出来。而我一直是处于翻墙状态的~（话说你们做程序员的都不翻墙用Google的吗😅，哈哈，吐嘈下） 针对这个问题，我添加了Gitalk 评论插件。在此，非常感谢 @FeDemo 的推荐 。 正文 Gitalk 评论插件 首先来看看 Gitalk 的界面和功能： gitalk 使用 ...

Posted by BY on December 19, 2017

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