Notes by Louisa

Notes by Louisa

Notes by Louisa

Introduction
Chapter1 Python Cheatsheet
Chapter2 Java Cheatsheet
Chapter3 Algorithm
Chapter4 Model
Chapter5 Statistics and A/B Testing
Chapter6 SQL
Chapter7 Big Data and Spark
Chapter8 Code Walk-Throughs
Chapter9 Special Topics
Project: The Winning Recipes to an Oscar Award
Project: A Crime Analysis of the Last Decade NYC
Project: Predict User Type Based on Citibike Data
GeoSpark/GeoSparkVis for Geospatial Big Data
Single Scattering Albedo
Sea Ice Albedo Retrievals
Lidar Project

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Bit Representation
10转2进制
2转10进制
ASCII
Unicode
Bit Operation
& bitwise AND(&&)
| bitwise OR ||
~ NOT
^ XOR
<< 左移右侧补充零
>> 右移算术右移左侧补充符号位
>>> 右移逻辑右移左侧补充0，叫做unsigned right shift
Practical Use Cases
Compression
Building Blocks
Bit tester: Given a number, whether its kth bit is 1
Bit setter: Set kth bit to 1, and the rest stays the same
Bit setter: Set kth bit to 0, and the rest stays the same
Problems
Determine whether a number x is a power of 2 (2^n, n>=0)
Determine the # of bits are different between 2 positive integers
如何数1: Hamming Weight
What happens if we assign a negative number to an unsigned integer
Determine whether a string contains unique characters
How to reverse all bits of a number
10进制Number to 16进制
实现Integer.parseint这个method
Convert 'd'-->'D'
Char to Hex digit

Chapter3 Algorithm

Bit Operations

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Last updated 5 years ago