Category Archives: IT

Startup Blogs

How to start a startup Startup Founders at Work The Best Simple Business Models Why I’m leaving silicon valley 未来世界的幸存者 Software and technology stack used by top companies Do things that don’t scale   Donate $5 to me for a … Continue reading

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Block Chain, Bitcoin, Ethereum Notes

Users use private key to manage address and transfer bitcoin need verify with all nodes. Anonymous vs Pseudonymous (BitCoin, public chain) Bitcoin miner income includes new added bitcoin and transaction fee, miners record transaction and gain bitcoins. Mining needs to … Continue reading

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Best Practice for Coding

1. Annotation always write before the code 2. Remove the console.log message and the redundant code once done. 3. For Javascript, prefer console.debug() when you have to have temporary logging in the code. 4. killall python 5. If need more data … Continue reading

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Web Basics

1. authentication: who you are authorization: what you can do cookie: more physical session: context (teaching – learning, lecturing) session cookie (bank login) persistent cookie (remember me option) token – certificate 2. multi-thread context thread thread pool blocking I/O single thread … Continue reading

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Technology Podcast notes

1. Fixed mind set VS growth mind set Behavior changes brain, learn something, like playing guitar Praise process and work, don’t always say you are smart or talented We can always be better 2. 四小时鼓掌赢20美元 目标便宜(赢钱到赌气) 成本束缚(鼓掌一个小时不愿放弃) 布莱希特论戏剧 不要沉浸在剧情中 生活是场大戏,也是可以改变的 … Continue reading

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Programming Reflection May 17

1. Array is easy to index specific element with index, it’s easier to calculate the difference between different elements than linked list. 2. LeetCode Trap Rain Water problem: iterate left and right elements for each element in the input array, … Continue reading

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Leet Code Summary and Reflection

  Array Tips: keep two points and shrink from left and right to center, check to meet certain requirement (sum equals a target number) until left index is over right one. Problems: Two Sum, 3Sum, 3Sum Closest, 4Sum, etc.   … Continue reading

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