Zhentiw - 博客园

2019年3月30日

[PureScript] Basic Data Constructors in PureScript

摘要： PureScript types are very extensive and we are going to experiment with type constructors and how to make then use them. We can define a custom data t 阅读全文

posted @ 2019-03-30 23:54 Zhentiw 阅读(147) 评论(0) 推荐(0)

[Algorithm] Check for balanced parentheses using stack

摘要： Algorithm or program to check for balanced parentheses in an expression using stack data structure. For example: The idea to solve the problem is: ope 阅读全文

posted @ 2019-03-30 23:34 Zhentiw 阅读(220) 评论(0) 推荐(0)

2019年3月29日

[PureScript] Introduce to PureScript Specify Function Arguments

摘要： JavaScript does its error-checking at runtime, but PureScript has a compiler, which makes sure that your program has no errors before it converts it a 阅读全文

posted @ 2019-03-29 21:07 Zhentiw 阅读(181) 评论(0) 推荐(0)

2019年3月28日

[Node.js] process.nextTick for converting sync to async

摘要： For example we have a function to check the filesize: It works fine, but the 'fileSize' function has a problem, those part of code run in sync, not as 阅读全文

posted @ 2019-03-28 21:40 Zhentiw 阅读(280) 评论(0) 推荐(0)

[Algorithm] Print 2-D array in spiral order

摘要： The idea to solve the problem is set five variable, first direction, we need to switch direction after we finish printing one row or one column. Then 阅读全文

posted @ 2019-03-28 03:23 Zhentiw 阅读(299) 评论(0) 推荐(0)

2019年3月27日

[React] Write a stateful Component with the React useState Hook and TypeScript

摘要： Here we refactor a React TypeScript class component to a function component with a useState hook and discuss how props and state types can be modeled 阅读全文

posted @ 2019-03-27 21:00 Zhentiw 阅读(424) 评论(0) 推荐(0)

[React] Use React.ReactNode for the children prop in React TypeScript components and Render Props

摘要： Because @types/react has to expose all its internal types, there can be a lot of confusion over how to type specific patterns, particularly around hig 阅读全文

posted @ 2019-03-27 20:45 Zhentiw 阅读(1039) 评论(0) 推荐(0)

[Functional Programming] Using Last monoid with Maybe

摘要： Imaging we have a deck of cards, eveytimes we need to pick one card from deck, the result we want to have is: For selected, each time we want only one 阅读全文

posted @ 2019-03-27 19:17 Zhentiw 阅读(195) 评论(0) 推荐(0)

[Algorithm] How many meeting rooms needed?

摘要： Give you set of meetings start time and end time, count how many meeting rooms needed. For example: We can use a memo table to store the at which time 阅读全文

posted @ 2019-03-27 02:03 Zhentiw 阅读(202) 评论(0) 推荐(0)

2019年3月26日

[Git] Undo a commit that has already been pushed to the remote repository

摘要： If we pushed our changes already to the remote repository we have to pay attention to not change the git history (using commands like rebase, reset, a 阅读全文

posted @ 2019-03-26 20:54 Zhentiw 阅读(279) 评论(0) 推荐(0)

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