原创 Leetcode [91]: Decode ways

A message containing letters from A-Z is being encoded to numbers using the following mapping: ‘A’ -> 1 ‘B’ -> 2 …

2020-06-29 03:09:14

原创 Xtensa 仿真環境tunning分析（ISS profile）

linux gprof tool https://www.ibm.com/developerworks/cn/linux/l-gnuprof.html Tenslica Profiling with the Xtensa ISS

2020-06-29 03:09:14 6

原创 Leetcode[234] Palindrome Linked List

234. Palindrome Linked List recursion not work, stack will be overflow class Solution(object): def isPalindrome

2020-06-29 03:09:14

原创 leetcode summary: link list problem solved by extra space

143. Reorder List link list ⇒ list class Solution(object): def reorderList(self, head): """ :ty

2020-06-29 03:09:14

原创 Leetcode summary: backstrack problem

46. Permutations Given a collection of distinct integers, return all possible permutations. Example: Input: [1,2,3]

2020-06-29 03:09:14

原创 python 底層實現原理

python framework //object base class typedef struct _object { PyObject_HEAD } PyObject; //variable length object

2020-06-29 03:09:13 1

原创 Leetcode summary: some trick problem

Here list some problem, maybe, sometimes, hard to think the way to resolve, and summary here, when it comes to the

2020-06-29 03:09:13

原创 xtensa instruction set architeture(ISA)

Code density The Xtensa core ISA is implemented as 24-bit instructions This instruction width pro- vides a direct

2020-06-29 03:09:13

原创 linux設備模型: kobject, kset

kobject linux3.4 struct kobject { const char *name; struct list_head entry; // directory entry, used for mou

2020-06-29 03:09:13

原创 [Algorithm]microsoft-a-string-into-sub-strings-with-additional-info-within-limited-length

https://leetcode.com/discuss/interview-question/439260/microsoft-phone-split-a-string-into-sub-strings-with-additio

2020-06-29 03:09:13

原创 Linux Driver 和Device的匹配過程

platform_driver_register() ->driver_register() ->bus_add_driver() ->driver_attach() ->bus_for_each_dev() 對每個掛在虛擬的pl

2020-06-29 03:09:13

原创 linux driver中的面向對象的應用和相關設計模式

創建類設計模式： 單例模式、 工廠模式、 抽象工廠模式、 原型模式、 建造者模式 結構類設計模式 裝飾器模式、 適配器模式、 門面模式、 組合模式、 享元模式、 橋樑模式 行爲類設計模式。 策略模式、 責任鏈模式、 命令

2020-06-29 03:09:13 3

原创 [Algorithm] 中文數字轉換爲阿拉伯數字

#coding=utf-8 chs_arabic_map = {u'零':0, u'一':1, u'二':2, u'三':3, u'四':4, u'五':5, u'六':6, u'七':7, u'八':8, u'九

2020-06-29 03:09:13

原创 Leetcode sumary: Math problem

29. Divide Two Integers class Solution(object): def divide(self, dividend, divisor): """ :type

2020-06-29 03:09:13

原创 [算法] 二叉排序樹查找中位數

比較tricky的解法，不用額外的內存 首先考慮將二叉樹轉換成雙向鏈表 [LeetCode] 426. Convert Binary Search Tree to Sorted Doubly Linked List 將二叉搜索樹轉

2020-06-29 03:09:13 1