SEARCH KEYWORD -- NIL SLICE
Ruby WinRM undefined method `split' for nil:NilClass
WinRM service is a service provided by Windows to enable remote access a Windows system. It is similar to what SSH is for *nix. And it is frequently used in applications which want to automate process or accessing remote Windows system and perform actions on them. Ruby also provided the WinRM gem which is an implementation of the WinRM service. When using WinRM gem, one may often want to use :negotiate as the transport protocol for authentication. This transport will negotiate using d...
Avoiding and exploiting JavaScript's warts
One's sentiment toward JavaScript flips between elegance and disgust without transiting intermediate states. The key to seeing JavaScript as elegant is understanding its warts, and knowing how to avoid, work around or even exploit them. I adopted this avoid/fix/exploit approach after reading Doug Crockford's JavaScript: The Good Parts: Doug has a slightly different and more elaborate take on the bad parts and awful parts, so I'm sharing my perspective on the four issues that ha...
JavaScript,warts,Exploit,with,variable,this 2012-02-15 05:51:21
Learn from Haskell - Functional, Reusable JavaScript
Learn You a Haskell: For Great Good? For the last couple months I have been learning Haskell. Because there are so many unfamiliar concepts, it feels like learning to program all over again. At i.TV, we write a lot of JavaScript (node.js and front end). While many functional/haskell paradigms don’t translate, there are a few techniques that JS can benefit from. There are Haskell library functions for everything. At first I thought this was just because it was mature, but then I notice...
JavaScript,Haskell,Functional,Reusability,Feature 2012-02-21 05:30:51
We need a programming language for the rest of us
Recently I took on the enormous task of learning Objective-C from the bottom up and I was struck by something I couldn’t shake: this is too hard. An experienced developer might scoff at me for saying that, but it’s true. I’ll be honest about my education, Calculus II was the most math I ever took, I have an advanced degree from Berkeley in Journalism. I am a proficient HTML/CSS developer and can glue enough javascript together to solve almost any problem that has presen...
Code.Programming,Expectation,Easy-to-use 2011-07-22 02:20:09
Build a Kubectl Plugin from Scratch
by author The command-line tool kubectl is indispensable when using Kubernetes. You need it to query related Pod and Service information both in developing or performing some maintenance operations, such as events, scale, rolling update, etc. However, when using kubectl, there are many inconveniences. Though Kubernetes is officially maintaining kubectl¹, and you can submit the problems, improvement, and even PR in its Github Issues, you still have to wait long before its release. The m...
golangci-lint to enable comment check for exported functions
golangci-lint is a command line tool which aggregates a list of different go linters to check whether the source code is in correct condition from different aspects. It is built to run during the CI pipeline so that there is no obvious coding issues before compiling and building the program. It is easy to run it with just below command $ golangci-lint run -v INFO [config_reader] Config search paths: [./ /Users /] INFO [config_reader] Used config file .golangci.yml INFO [lintersdb] Active 10 li...
EXPORTED COMMENT,GOLINT,REVIVE,GOLANGCI-LINT,GOLANG 2022-04-15 20:21:34
How the Go language improves expressiveness without sacrificing runtime performance
This week there was a discussion on the golang-nuts mailing list about an idiomatic way to update a slice of structs. For example, consider this struct representing a set of counters. type E struct { A, B, C, D int } var e = make([]E, 1000) Updating these counters may take the form for i := range e { e[i].A += 1 e[i].B += 2 e[i].C += 3 e[i].D += 4 } Which is good idiomatic Go code. It's pretty fast too BenchmarkManual 500000 ...
Go,Expressiveness,Performace,Sacrifice 2012-02-12 04:53:55
Our Go Cache Library Choices
In Build a Go KV Cache from Scratch in 20 minutes, I walked you through what matters when writing a local cache, and eventually implemented one, whose performance was beaten badly by that of the popular go-cache on Github though. However, the bright side is that we can learn a lot from those excellent Github Go cache products, studying their features, applicable scenarios, and implementations, and extracting what we need. In this article, I will mainly analyze and compare the four...
GOLANG,CACHE,GO-CACHE,BIGCACHE,GOURPCACHE 2022-04-16 07:48:11
Translating math into code with examples in Java, Racket, Haskell and Python
Discrete mathematical structures form the foundation of computer science.These structures are so universal that most research papers in the theory of computation, programming languages and formal methods present concepts in terms of discrete mathematics rather than code.The underlying assumption is that the reader will know how to translate these structures into a faithful implementation as a working program.A lack of material explaining this translation frustrates outsiders.What deepens that fr...
Math,Algorithms,Formula,Program,Python 2011-11-14 08:43:15
A Sip of Go Log
Logging is indispensable in any code that we need its support both in debugging and in statistics. However, a package that filled withfmt.Println/fmt.Printf printing various messages can never be considered a read-to-be-adopted package, which can be optimized by a simple change, using Golang’s native log package to print information to standard output or to a file. Then, how to apply the log package? Are there any limitations? If so, can we seek open-source packages? Let&rsq...
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