golang-nuts@googlegroups.com discussions for November 2015

87	[go-nuts] Code of Conduct Proposal

Hi golang-nuts, I've just submitted the second revision of the proposal for a Code of Conduct for our community. Please take a look at the document here ...

Andrew Gerrand
Nov 17, 2015 at 11:22 pm
Nov 24, 2015 at 1:33 pm

27	[go-nuts] What's so bad about stdlib's log package?

I see a lot of hate directed at the stdlib's log package, and of course, there are a medley of third party logging packages. What are people's problems with the standard log package? I've seen ...

Nate Finch
Nov 5, 2015 at 3:40 am
Nov 25, 2015 at 12:21 pm

27	[go-nuts] nil interfaces rationale

Hi, I recently stumbled upon description of "nil interface" cause. It's pretty much obvious how it works. What I cannot understand is WHY? Why golang contains such a controversial feature? And the ...

Igor Baidiuk
Nov 10, 2015 at 1:57 pm
Nov 11, 2015 at 10:13 pm

26	[go-nuts] generic functions

I'm sure there are many different opinions about how Go could have generics. In my opinion generic functions are the most needed kind of generics. It is easier to do without generic types than ...

Bjarke Ebert
Nov 11, 2015 at 1:46 am
Nov 14, 2015 at 7:21 pm

21	[go-nuts] StringBuilder in Go with bytes.Buffer

How best to construct bytes.Buffer gradually? with fmt.Fprint? This is my code: ``` func getReqAddons(r Request) string { ret := "" if len(r.RequestPlugins.RequestPlugin) != 0 { for _, v := range ...

Tong Sun
Nov 1, 2015 at 7:53 pm
Nov 3, 2015 at 12:48 am

20	[go-nuts] Create go file for “release”

hello I want to make a golang file for "*release*". This is my command: go build -o testi.exe -ldflags "-H windowsgui" my code: package main import ( "fmt" "os" //"github.com/chai2010/qml" ...

Ravand City
Nov 5, 2015 at 2:24 pm
Nov 24, 2015 at 10:49 am

17	[go-nuts] Day 1

Hello everyone We're just starting our journey down the GO path, and I was hoping someone could point me in the right direction here. We're all very used to rails, gemfiles, github and capistrano ...

Matt Davies
Nov 4, 2015 at 2:58 pm
Nov 10, 2015 at 2:15 pm

16	[go-nuts] Recompiling and replacing a function at runtime?

Sometimes I find myself in need to edit one of the functions I have, and restarting the whole program just for that is kind of... Let's say I'm too lazy for that. It seems that recompiling and ...

Peret Finctor
Nov 11, 2015 at 9:46 am
Nov 13, 2015 at 10:28 am

15	[go-nuts] AsmFmt: GoFmt for assembler files - feedback requested!

Hi! I was getting annoyed by all the different formatting styles of assembler code. My thought was, that we have "solved" that very nicely with Go, by having a standard formatter, so I set out to do ...

Klaus Post
Nov 30, 2015 at 3:44 pm
Dec 2, 2015 at 8:45 pm

15	[go-nuts] [ANN] Fast HTTP package - fasthttp

Hi all, If you think net/http <https://golang.org/pkg/net/http/ server is slow, try fasthttp <https://github.com/valyala/fasthttp , which is up to 10x faster (on synthetic benchmarks of course :) It ...

Aliaksandr Valialkin
Nov 22, 2015 at 2:18 pm
Dec 1, 2015 at 6:51 pm

15	[go-nuts] Once you have a pointer receiver method, might as well make them all pointer receivers?

Based on the race puzzle Dave Cheney posted here: http://dave.cheney.net/2015/11/18/wednesday-pop-quiz-spot-the-race Once you have a pointer receiver method on a type, should you make all of them ...

Tim K
Nov 21, 2015 at 4:31 pm
Nov 23, 2015 at 3:54 am

15	[go-nuts] Deterministic json.Marshal result

Hello, Can I consider that output of json.Marshal is deterministic for the same struct with the identical values? For example : http://play.golang.org/p/Sb1rTfGkFj In the above example, can I ...

Jérôme LAFORGE
Nov 12, 2015 at 5:50 pm
Nov 17, 2015 at 3:34 am

14	[go-nuts] Please start doing releases for your packages and libraries

The Go community is the one popular language community that doesn't regularly produce released versions of packages/libraries. This is kind of an annoying problem. Can we please start doing release ...

Matt Farina
Nov 16, 2015 at 6:17 pm
Nov 17, 2015 at 4:12 pm

14	[go-nuts] is the len(chan) thread safe ?

Hi all. Channel is the language primitive and when you read/write to it some synchronization mechanism like mutex is used internally * I suppose*. But is the synchronization used when you call len() ...

Loofort
Nov 12, 2015 at 12:23 pm
Nov 13, 2015 at 8:05 pm

14	[go-nuts] I can't figure out how to correctly use the profiler

Hi, I'm working on a server for a game and I'm encountering a lot of lag on the server. I wanted to set up the profiler to see which functions were causing the most lag but I can't seem to figure out ...

Zacharyholland
Nov 8, 2015 at 4:28 am
Nov 9, 2015 at 1:19 am

13	[go-nuts] How can I debug using GDB on IntelliJ IDEA.

Hello everyone, I'm using IntelliJ IDEA 15 to develop golang projects. To debug golfing project, I installed GDB. But I couldn't find GDB related setting on IntelliJ IDEA. I'm trying it on macbook ...

Harry
Nov 4, 2015 at 6:34 am
Nov 7, 2015 at 3:17 am

12	[go-nuts] Please test Go's HTTP/2 support

At Go tip (what will become Go 1.6), there is now support for HTTP/2, for both client and server. If you run an HTTPS webserver (ListenAndServeTLS), or use the net/http client functionality for ...

Brad Fitzpatrick
Nov 7, 2015 at 4:35 pm
Nov 14, 2015 at 9:15 pm

12	[go-nuts] Sublime Text build system integration packages

Gophers, This is our first stable release of a set of Sublime Text packages (v0.9.0): - 'golangconfig' is a developer library used to obtain information about the local Go environment. It handles ...

Jason Buberel
Nov 4, 2015 at 3:33 pm
Nov 12, 2015 at 7:46 pm

11	[go-nuts] Panic/hang handling signals when Cgo based package in use (graphicsmagick)

Hi all, I've been struggling with this issue since yesterday and I'm not quite sure if it's a Go bug or related to the GraphicsMagick wand library that I've wrapped using Cgo. I've created a sample ...

Chris
Nov 19, 2015 at 8:29 pm
Nov 20, 2015 at 2:17 am

11	[go-nuts] Minimal Go Installation?

I am a newbie to Golang. I compiled Go 1.5 on arm/linux (BeagleBone Black). After build, the go folder is larger than 200MB. I want to deploy it on embedded linux systems with rootfs size less than ...

Matianfu
Nov 13, 2015 at 1:33 pm
Nov 19, 2015 at 10:38 pm

10	[go-nuts] per-thread pseudo-random generators

Hi. I have small problem that I think could be solved with per-thread random number generators (which Go doesn't provide, right?). I have something like: type Manager struct { res Resource } func (m ...

Roberto Zanotto
Nov 22, 2015 at 10:00 pm
Nov 25, 2015 at 1:25 am

10	[go-nuts] Reference FPS test for Windows console and Linux terminal

We have a dispute if handling Windows console should be done the same way as Linux terminal. I feel that Linux terminal is slower (Gnome terminal in particular), but I can prove that. Are there any ...

Anatoly techtonik
Nov 17, 2015 at 11:40 pm
Nov 20, 2015 at 5:34 pm

10	[go-nuts] Hello world doesn't print to screen and program doesnt exit

When I run the following code with the command "go.exe run main.go", the program doesnt print text to the screen or exit. package main import "fmt" func main(){ fmt.Println("Hello world") } Line ...

Mbudge1
Nov 15, 2015 at 3:46 pm
Nov 17, 2015 at 9:18 am

10	[go-nuts] How to build only specific import src.

Hi guys, I want to build one of import src from github because of replaced src. For example, my gopath directory is like this, bin pkg src/github.com/aaaaa src/github.com/bbbbb src/myproj/xxxxx And I ...

Harry
Nov 9, 2015 at 1:49 pm
Nov 10, 2015 at 7:28 am

10	[go-nuts] question about unicode in golang

i know that Go use unicode to represante characteres : so normally 'A' will be represented as : 0041 and stored in 2 bytes as : 0000 0000 0100 0001 in memory but when i do fmt.Print([]byte("A")) ...

WALID BELRHALMIA
Nov 7, 2015 at 9:00 pm
Nov 8, 2015 at 9:43 am

10	[go-nuts] More efficient buffers and wrappers for reading and writing, plus inefficient conversion of string to bytes

Hi all, I noticed some very slow behavior writing files, which on investigation turned out to be because of the overhead of calling `Write` thousands of times. So I came up with an idea to make this ...

569234
Nov 5, 2015 at 6:10 am
Nov 5, 2015 at 9:09 pm

9	[go-nuts] I want to do inheritance, but I know that's wrong -- what's the right way?

In another application in another language, I have a package that works with bitmasks. The base class receives an assoc array of string=int and just does things like hasFlags, addFlags, removeFlags ...

Richard Sugg
Nov 28, 2015 at 6:45 pm
Nov 30, 2015 at 7:08 pm

9	[go-nuts] portable interactive console applications

Following a recent thread about end of line handling on Windows, out of curiosity I dusted off an old laptop with Windows 7 and installed Go. I tried to run this program ...

Manlio Perillo
Nov 5, 2015 at 2:36 pm
Nov 6, 2015 at 11:15 am

9	[go-nuts] golang 1.5.1 GC problem for large memory cache service

Hi all, I have a service that acts as a lru cache for backend redis storage. It cache's about 800M items that consume about 15GB memory. Soon it encountered with GC problem. The cpu usage monitor ...

Huabin Zheng
Nov 3, 2015 at 1:11 pm
Nov 4, 2015 at 5:18 pm

8	[go-nuts] Locating goroutine leakage using trace

Hello! There is a tool called trace <https://golang.org/s/go15trace which was released in go1.5 <https://golang.org/doc/go1.5#trace_command . I know that there is goroutine leakage in my code (by ...

Grigory Kalabin
Nov 26, 2015 at 11:10 am
Nov 27, 2015 at 10:46 am

8	[go-nuts] Security considerations about subtle.ConstantTimeCompare

Hi there, First time participating in this group. Lately I have been taking a look at subtle.ConstantTimeCompare and how it is being used out there, and to my surprise, many many people are using it ...

Imkira
Nov 20, 2015 at 1:25 pm
Nov 21, 2015 at 5:33 am

8	[go-nuts] Can't write encoding other than "chunked" in the Transfer-Encoding field of http.Request

I set the Transfer-Encoding field in the request header to "chunked,gzip", but the request sent on wire only contains "chunked". It seems the only possible value in the Transfer-Encoding field of a ...

Caesarxuchao
Nov 16, 2015 at 10:42 pm
Nov 17, 2015 at 9:28 pm

8	[go-nuts] Goroutines / Threads / Fibers

Good day everyone. I have a few questions I was hoping to get answered if anyone could take the time. I have not taken the plunge in to working with Golang just yet, as I'm more of a C fanatic, but I ...

Jonathan D Hall
Nov 16, 2015 at 1:15 am
Nov 16, 2015 at 3:50 pm

8	[go-nuts] encoding/xml bug? panic: reflect.Set: value of type []uint8 is not assignable to type []string

I'm experiencing a string problem -- please take a look at this simple demo https://play.golang.org/p/1fIeJI7K6A It clearly shows that QueryStringParameters.QueryStringParameter can be further break ...

Tong Sun
Nov 4, 2015 at 4:40 pm
Nov 7, 2015 at 1:06 am

7	[go-nuts] Using Go for big data?

Gophers, We're currently conducting market research on the use of Go for big data projects. We are looking for developers whose work involves analyzing large datasets who wouldn't mind spending a few ...

Jason Buberel
Nov 17, 2015 at 5:13 pm
Dec 8, 2015 at 11:14 pm

7	[go-nuts] Newb question

So, I'm trying to figure out how to use a struct type the correct way. I have: type Something []struct { Field string } What I can't figure out is how to instantiate it correctly and append elements ...

Charles Burton
Nov 24, 2015 at 7:23 pm
Nov 24, 2015 at 7:50 pm

7	[go-nuts] [ANN] Reader to remove comments from JSON

With this I am trying to win the "Most Useless Go Package 2015"--before it is even invented. I made a super-simple Reader that removes those #-to-end-of-the-line comments as it reads a JSON-ish file ...

Giulio Iotti
Nov 17, 2015 at 11:30 am
Nov 17, 2015 at 6:43 pm

7	[go-nuts] Large number of memory maps after scavenger call

Hi everyone, I think I have stumbled upon a "peculiarity" with the Scavenger on Go 1.5.1 (and 1.5 for that matter): While parsing a large directory tree (on linux-amd64) I was monitoring the memory ...

Fako1024
Nov 12, 2015 at 10:50 pm
Nov 13, 2015 at 10:15 am

7	[go-nuts] question about strings.Split("/", "/)

http://play.golang.org/p/-jOkcgYQUo Why strings.Split("/","/") return slice with two empty elements? -- Vasiliy Tolstov, e-mail: <span class="m_body_email_addr" ...

Vasiliy Tolstov
Nov 12, 2015 at 9:54 am
Nov 12, 2015 at 11:43 am

7	[go-nuts] Re: Getting hardware information in Go

Hi, Could you please send me sample code on how to get *BIOS serial number?* which works with Linux,Windows,MAC OS X only with GO language implementation. I would be very grateful if you can send a ...

Sagar Puneria
Nov 5, 2015 at 5:55 pm
Nov 9, 2015 at 10:27 am

6	[go-nuts] golang based xml manipulation package

Echoing the request from http://stackoverflow.com/questions/31104777/golang-xml-processing, but need more manipulating power. I.e., I know the answer to above stackoverflow question was beevik's ...

Tong Sun
Nov 27, 2015 at 8:23 pm
Nov 28, 2015 at 8:13 pm

6	[go-nuts] UDP Client performance

Hi, In order to become familiar with Go as a network programming language, I wrote a little UDP client and compared it with a similar client written in Perl: package main import ( "net" "fmt" ) func ...

Jan De Backer
Nov 23, 2015 at 4:00 am
Nov 24, 2015 at 6:03 pm

6	[go-nuts] Go Process is not recovered once the disk is full.(Even after freeing some space in the disk)

Hi, I have a query I am using Go version 1.4. I have a GO Process running which will write the logs in /tmp Path. if /tmp partition is full then my go process will get struct. Process will not ...

Saikumaryarava
Nov 16, 2015 at 3:38 pm
Nov 23, 2015 at 5:40 pm

6	[go-nuts] Message Pack, Gob Go Lang - slow down if invoke through multiple go routines

if I increase i 0 to 400.. or more, MsgPack or Gob takes too long to decode same message ( for i:=0 200 usec, if i=100 loop few in 200 usec few takes 6 millisec ) Please help func main() { ...

Desaiabhijit
Nov 23, 2015 at 7:45 am
Nov 23, 2015 at 9:06 am

6	[go-nuts] Cross-compiling cgo with headers

Hi All, I'm writing a library which uses cgo to link against libacl. Compiling on linux_amd64 for linux_amd64 works fine (so long as you have the libacl headers installed). However, cross-compiling ...

Hello
Nov 11, 2015 at 1:49 am
Nov 23, 2015 at 8:33 am

6	[go-nuts] Cannot pass fn which creates supertype to fn which expects fn for subtype

Hi Gophers, I'm trying to pass a constructor which creates a supertype to a function which expects a constructor for a subtype but that doesn't work. It works when I pass the instance the constructor ...

Frank Schröder
Nov 20, 2015 at 10:54 am
Nov 20, 2015 at 3:09 pm

6	[go-nuts] GopherCon Regionals?

Hello Gophers! First we’d like to thank all of you for making GopherCon such a huge success. If you haven’t seen the highlight video and speaker interviews yet, you can view them here ...

Erik St. Martin
Nov 13, 2015 at 1:38 am
Nov 18, 2015 at 12:47 pm

6	[go-nuts] net/http FileServer and mime detection

Hi! I'm use http.FileServer and dont want additional read/seek requests to determine mine type for content-type header. Does it possible to disable this? Or i need to create own FileServer ...

Vasiliy Tolstov
Nov 13, 2015 at 9:43 am
Nov 17, 2015 at 3:55 am

6	[go-nuts] Possible bug in Windows os/signal

The behavior of following small program is different if run on Windows compared with OSX or Linux: package main import ( "log" "os" "os/signal" "time" ) func main() { ch := make(chan os.Signal) ...

John Jeffery
Nov 14, 2015 at 4:09 am
Nov 16, 2015 at 8:52 pm

6	[go-nuts] What are the meanings of ctx, ret, and lr in `gobuf struct`?

Hi, I am currently trying to understand how Go context switches between different goroutines without saving all the registers. As part of that search, I found the following structure in runtime2.go, ...

Henry Qin
Nov 15, 2015 at 9:33 pm
Nov 16, 2015 at 4:51 pm

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