Zhentiw - 博客园

2019年3月10日

摘要： Let's say given a number of array, you should print out, all the subet of this array. Example: [1, 2] Output: > "" > 1> 2 > 1,2 The number of subset s 阅读全文

posted @ 2019-03-10 22:43 Zhentiw 阅读(170) 评论(0) 推荐(0)

[Functional Programming] mapReduce over Async operations and fanout results in Pair(rejected, resolved) (fanout, flip, mapReduce)

摘要： This post is similar to previous post. The difference is in this post, we are going to see how to handle both successfuly result and error result by u 阅读全文

posted @ 2019-03-10 21:17 Zhentiw 阅读(217) 评论(0) 推荐(0)

[Functional Programming] mapReduce over Async operations with first success prediction (fromNode, alt, mapReduce, maybeToAsync)

摘要： Let's say we are going to read some files, return the first file which pass the prediction method, this prediction method can be just check whether th 阅读全文

posted @ 2019-03-10 04:24 Zhentiw 阅读(275) 评论(0) 推荐(0)

2019年3月9日

[Debug] Debug Node.js Application by using Chrome Dev tools

摘要： For example you have a server.js file, and you want to debug some problems; What you can do is: Then go to chrome broswer: You will find node.js targe 阅读全文

posted @ 2019-03-09 18:16 Zhentiw 阅读(198) 评论(0) 推荐(0)

[Node.js] Availability and Zero-downtime Restarts

摘要： It might be possible for our node server has some downtime, no matter it is because server update or simply some crashs in the code. We want to minizi 阅读全文

posted @ 2019-03-09 17:16 Zhentiw 阅读(408) 评论(0) 推荐(0)

2019年3月8日

[Node.js] Load balancing a Http server

摘要： Let's see how to do load balancing in Node.js. Before we start with the solution, you can do a test to see the ability concurrent requests your curren 阅读全文

posted @ 2019-03-08 22:51 Zhentiw 阅读(269) 评论(0) 推荐(0)

[Node.js] Child Process with fork() to handle heavy calculation process

摘要： When build server, if we have a API endpoint requires some heavy calculation process, it will block the whole world. In this post, we will see how to 阅读全文

posted @ 2019-03-08 22:13 Zhentiw 阅读(340) 评论(0) 推荐(0)

[Algorithm] Write your own Math.pow function in Javascript, using Recursive approach

摘要： /**@abstract * Write your own Math.pow(a int, b int) function * */ function pow (a, b) { let result = 0; let nigate = b = 2) { result = isEven ? pow(a, b / 2) * pow(a, b / 2) : a * pow(... 阅读全文

posted @ 2019-03-08 19:06 Zhentiw 阅读(219) 评论(0) 推荐(0)

[Functional Programming] Fst & Snd, Code interview question

摘要： cons(a, b) constructs a pair, and car(pair) and cdr(pair) returns the first and last element of that pair. For example, car(cons(3, 4)) returns 3, and 阅读全文

posted @ 2019-03-08 18:16 Zhentiw 阅读(319) 评论(0) 推荐(0)

[React GraphQL] Pass Parameters to urql's useQuery React Hook

摘要： Showing how to use 'uqrl' library to do GraphQL in React. 阅读全文

posted @ 2019-03-08 14:36 Zhentiw 阅读(391) 评论(0) 推荐(0)

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