Go于V語(yǔ)言 go語(yǔ)言bufio

Go和Java哪個(gè)語(yǔ)言好?

go語(yǔ)言和java,go語(yǔ)言更有前途。

成都創(chuàng)新互聯(lián)公司主營(yíng)嶗山網(wǎng)站建設(shè)的網(wǎng)絡(luò)公司,主營(yíng)網(wǎng)站建設(shè)方案,成都APP應(yīng)用開(kāi)發(fā),嶗山h5微信平臺(tái)小程序開(kāi)發(fā)搭建,嶗山網(wǎng)站營(yíng)銷推廣歡迎嶗山等地區(qū)企業(yè)咨詢

1.Java仍然是主流的企業(yè)級(jí)應(yīng)用編程語(yǔ)言,看看阿里,華為等大廠的招聘崗位就知道了。

2.Go語(yǔ)言代表了未來(lái),很多新興上市公司,如B站,高途課程等用Go做主編程語(yǔ)言。我所知道的一些創(chuàng)業(yè)公司,也開(kāi)會(huì)嘗試用Go語(yǔ)言。我個(gè)人也有在我司(金融機(jī)構(gòu))推動(dòng)Go語(yǔ)言的想法。

Go語(yǔ)言的流行是因?yàn)閮牲c(diǎn):

Golang在開(kāi)發(fā)效率和執(zhí)行效率上都有優(yōu)勢(shì),對(duì)于Java開(kāi)發(fā)者也很容易上手。

Go是谷歌開(kāi)發(fā)的,谷歌技術(shù)好,有情懷。相比來(lái)說(shuō),Java的母公司Oracle是一個(gè)沒(méi)有情懷和技術(shù)的惡霸。

如果各用一句話來(lái)概括這3個(gè)編程語(yǔ)言的特點(diǎn):

1.Java「就業(yè)最好」:崗位多,工資高。這個(gè)趨勢(shì)也許會(huì)持續(xù)5-10年。

2.Go語(yǔ)言「最有前途」,語(yǔ)言優(yōu)秀,家底豐厚,但暫時(shí)就業(yè)崗位還不是很多。

資薪對(duì)比:

Java和Go語(yǔ)言薪資水平相當(dāng),都比較高。

就業(yè)崗位數(shù):

很多應(yīng)用Python的崗位,可能不會(huì)發(fā)布招聘崗位,所以Python在工作中的使用情況應(yīng)該比這個(gè)數(shù)據(jù)多的多。

Go的崗位應(yīng)該也比這個(gè)數(shù)據(jù)多,可能很多新的崗位會(huì)發(fā)布到更加新興的招聘平臺(tái)上去。

如何配置go語(yǔ)言集成開(kāi)發(fā)環(huán)境 vim

1、編譯vimgdb

下載vimgdb73和vim73

mkdir -p ./tmp

cd tmp

tar zxvf ../vim-7.3.tar.gz

unzip ../vimgdb-for-vim7.3-master.zip

mv vimgdb-for-vim7.3-master vimgdb-for-vim7.3

patch -p0 vimgdb-for-vim7.3/vim73.patch

cd vim73

安裝依賴

sudo apt-get install build-essential

sudo apt-get build-dep vim-gtk

sudo apt-get install libncurses5-dev

安裝

// 這里直接執(zhí)行make的操作

make

sudo make install

安裝vimgdb runtime

cd ../vimgdb-for-vim7.3

cp vimgdb_runtime ~/.vim/bundle

打開(kāi)vim

:helptags ~/.vim/bundle/vimgdb_runtime/doc " 生成doc文件

添加配置.vimrc

" vimgdb插件

run macros/gdb_mappings.vim

在vim中執(zhí)行g(shù)db時(shí),報(bào) “Unable to read from GDB pseudo tty” 的錯(cuò)誤,因?yàn)闆](méi)有安裝 gdb ,所以安裝gdb

sudo apt-get install gdb

2、安裝vundle

set up vundle

$ git clone ~/.vim/bundle/vundle

Configure Plugins

在.vimrc文件的開(kāi)頭添加下面的內(nèi)容,有些不是必須的,可以注掉

set nocompatible " be iMproved, required

filetype off " required

" set the runtime path to include Vundle and initialize

set rtp+=~/.vim/bundle/vundle/

call vundle#rc()

" alternatively, pass a path where Vundle should install plugins

"let path = '~/some/path/here'

"call vundle#rc(path)

" let Vundle manage Vundle, required

Plugin 'gmarik/vundle'

" The following are examples of different formats supported.

" Keep Plugin commands between here and filetype plugin indent on.

" scripts on GitHub repos

Plugin 'tpope/vim-fugitive'

Plugin 'Lokaltog/vim-easymotion'

Plugin 'tpope/vim-rails.git'

" The sparkup vim script is in a subdirectory of this repo called vim.

" Pass the path to set the runtimepath properly.

Plugin 'rstacruz/sparkup', {'rtp': 'vim/'}

" scripts from

Plugin 'L9'

Plugin 'FuzzyFinder'

" scripts not on GitHub

Plugin 'git://git.wincent.com/command-t.git'

" git repos on your local machine (i.e. when working on your own plugin)

Plugin ''

" ...

filetype plugin indent on " required

" To ignore plugin indent changes, instead use:

"filetype plugin on

"

" Brief help

" : PluginList - list configured plugins

" : PluginInstall(!) - install (update) plugins

" : PluginSearch(!) foo - search (or refresh cache first) for foo

" : PluginClean(!) - confirm (or auto-approve) removal of unused plugins

"

" see :h vundle for more details or wiki for FAQ

" NOTE: comments after Plugin commands are not allowed.

" Put your stuff after this line

Install Plugins

Launch vim and run

: PluginInstall

vim +PluginInstall +qall

3、官方vim-lang插件

Config vim file .vimrc,Add content bellow in bottom of the file

" 官方的插件

" Some Linux distributions set filetype in /etc/vimrc.

" Clear filetype flags before changing runtimepath to force Vim to

" reload them.

filetype off

filetype plugin indent off

set runtimepath+=$GOROOT/misc/vim

filetype plugin indent on

syntax on

autocmd FileType go autocmd BufWritePre Fmt

4、代碼補(bǔ)全的插件gocode

配置go的環(huán)境變量,比如我的配置,GOPATH變量是必須要配置的,PATH中必須把GOPATH的bin也添加進(jìn)去,否則沒(méi)有自動(dòng)提示,會(huì)提示找不到模式

export GOROOT=/usr/local/go

export GOPATH=/data/app/gopath

export PATH=$PATH:$GOROOT/bin:$GOPATH/bin

Set up gocode

Then you need to get the appropriate version of the gocode, for 6g/8g/5g compiler you can do this:

go get -u github.com/nsf/gocode (-u flag for "update")

Configure vim in .vimrc file

Plugin 'nsf/gocode', {'rtp': 'vim/'}

Install Plugins

Launch vim and run

: PluginInstall

vim +PluginInstall +qall

寫(xiě)一個(gè)helloword程序,輸入fmt后按C-xC-o如果能看到函數(shù)的聲明展示出來(lái),說(shuō)明安裝是正確的。

4、代碼跳轉(zhuǎn)提示godef

Set up godef

go get -v code.google.com/p/rog-go/exp/cmd/godef

go install -v code.google.com/p/rog-go/exp/cmd/godef

git clone ~/.vim/bundle/vim-godef

Configure vim in .vimrc file

Bundle 'dgryski/vim-godef'

Install Plugins

Launch vim and run

: PluginInstall

vim +PluginInstall +qall

5、代碼結(jié)構(gòu)提示gotags

Set up gotags

go get -u github.com/jstemmer/gotags

Put the following configuration in your vimrc:

Bundle 'majutsushi/tagbar'

nmap :TagbarToggle

let g:tagbar_type_go = {

\ 'ctagstype' : 'go',

\ 'kinds' : [

\ 'p:package',

\ 'i:imports:1',

\ 'c:constants',

\ 'v:variables',

\ 't:types',

\ 'n:interfaces',

\ 'w:fields',

\ 'e:embedded',

\ 'm:methods',

\ 'r:constructor',

\ 'f:functions'

\ ],

\ 'sro' : '.',

\ 'kind2scope' : {

\ 't' : 'ctype',

\ 'n' : 'ntype'

\ },

\ 'scope2kind' : {

\ 'ctype' : 't',

\ 'ntype' : 'n'

\ },

\ 'ctagsbin' : 'gotags',

\ 'ctagsargs' : '-sort -silent'

\ }

命令模式下按在右邊就會(huì)顯示當(dāng)前文件下的函數(shù)名,結(jié)構(gòu)體名等等,光標(biāo)放到相應(yīng)的tag上,按回車可以快速跳到程序中的相應(yīng)位置。

再次按會(huì)關(guān)閉tag窗口。

PS:本地的.vimrc的配置

" 插件管理器 vundle

set nocompatible " be iMproved, required

filetype off " required

" set the runtime path to include Vundle and initialize

set rtp+=~/.vim/bundle/vundle/

call vundle#rc()

" alternatively, pass a path where Vundle should install plugins

"let path = '~/some/path/here'

"call vundle#rc(path)

" let Vundle manage Vundle, required

Plugin 'gmarik/vundle'

" The following are examples of different formats supported.

" Keep Plugin commands between here and filetype plugin indent on.

" scripts on GitHub repos

" Plugin 'tpope/vim-fugitive'

" Plugin 'Lokaltog/vim-easymotion'

" Plugin 'tpope/vim-rails.git'

" The sparkup vim script is in a subdirectory of this repo called vim.

" Pass the path to set the runtimepath properly.

" Plugin 'rstacruz/sparkup', {'rtp': 'vim/'}

" scripts from

" Plugin 'L9'

" Plugin 'FuzzyFinder'

" scripts not on GitHub

" Plugin 'git://git.wincent.com/command-t.git'

" git repos on your local machine (i.e. when working on your own plugin)

" Plugin ''

" ...

"

filetype plugin indent on " required

" To ignore plugin indent changes, instead use:

" filetype plugin on

"

" Brief help

" : PluginList - list configured plugins

" : PluginInstall(!) - install (update) plugins

" : PluginSearch(!) foo - search (or refresh cache first) for foo

" : PluginClean(!) - confirm (or auto-approve) removal of unused plugins

"

" see :h vundle for more details or wiki for FAQ

" NOTE: comments after Plugin commands are not allowed.

" Put your stuff after this line

syntax on

" ********************************************************************

" 這里省略了其它不相關(guān)的插件

" vimgdb插件

run macros/gdb_mappings.vim

" 官方的插件

" Some Linux distributions set filetype in /etc/vimrc.

" Clear filetype flags before changing runtimepath to force Vim to

" reload them.

filetype off

filetype plugin indent off

set runtimepath+=$GOROOT/misc/vim

filetype plugin indent on

syntax on

autocmd FileType go autocmd BufWritePre buffer Fmt

" 代碼補(bǔ)全的插件

Bundle 'Blackrush/vim-gocode'

" 代碼跳轉(zhuǎn)提示

Bundle 'dgryski/vim-godef'

" 代碼結(jié)構(gòu)提示

Bundle 'majutsushi/tagbar'

nmap F8 :TagbarToggleCR

let g:tagbar_type_go = {

\ 'ctagstype' : 'go',

\ 'kinds' : [

\ 'p:package',

\ 'i:imports:1',

\ 'c:constants',

\ 'v:variables',

\ 't:types',

\ 'n:interfaces',

\ 'w:fields',

\ 'e:embedded',

\ 'm:methods',

\ 'r:constructor',

\ 'f:functions'

\ ],

\ 'sro' : '.',

\ 'kind2scope' : {

\ 't' : 'ctype',

\ 'n' : 'ntype'

\ },

\ 'scope2kind' : {

\ 'ctype' : 't',

\ 'ntype' : 'n'

\ },

\ 'ctagsbin' : 'gotags',

\ 'ctagsargs' : '-sort -silent'

\ }

Go語(yǔ)言的%d,%p,%v等占位符的使用

這些是死知識(shí),把常用的記住,不常用的直接查表就行了

golang 的fmt 包實(shí)現(xiàn)了格式化I/O函數(shù),類似于C的 printf 和 scanf。

type Human struct {

Name string

}

var people = Human{Name:"zhangsan"}

golang沒(méi)有 '%u' 點(diǎn)位符,若整數(shù)為無(wú)符號(hào)類型,默認(rèn)就會(huì)被打印成無(wú)符號(hào)的。

寬度與精度的控制格式以Unicode碼點(diǎn)為單位。寬度為該數(shù)值占用區(qū)域的最小寬度;精度為小數(shù)點(diǎn)之后的位數(shù)。

操作數(shù)的類型為int時(shí),寬度與精度都可用字符 '*' 表示。

對(duì)于 %g/%G 而言,精度為所有數(shù)字的總數(shù),例如:123.45,%.4g 會(huì)打印123.5,(而 %6.2f 會(huì)打印123.45)。

%e 和 %f 的默認(rèn)精度為6

對(duì)大多數(shù)的數(shù)值類型而言,寬度為輸出的最小字符數(shù),如果必要的話會(huì)為已格式化的形式填充空格。

而以字符串類型,精度為輸出的最大字符數(shù),如果必要的話會(huì)直接截?cái)唷?/p>

使用起來(lái)很簡(jiǎn)單,一般配合fmt.Printf()使用,因?yàn)閒mt的Printf()是有格式的輸出,切忌使用Println(),否則將會(huì)以字符串的形式輸出。

查看原文: golang fmt格式“占位符”

go是什么意思 go的幾種解釋

1、Go(又稱 Golang)是 Google 的 Robert Griesemer,Rob Pike 及 Ken Thompson 開(kāi)發(fā)的一種靜態(tài)強(qiáng)類型、編譯型語(yǔ)言。Go 語(yǔ)言語(yǔ)法與 C 相近,但功能上有:內(nèi)存安全,GC(垃圾回收),結(jié)構(gòu)形態(tài)及 CSP-style 并發(fā)計(jì)算。

2、go:v.去;走;(尤指與某人)去(某處或出席某項(xiàng)活動(dòng));移動(dòng),旅行,行走(指方式或距離)。n.(游戲或活動(dòng)中)輪到的機(jī)會(huì);(做某事的)嘗試,一番努力;精力;活力;熱情;干勁。

本文標(biāo)題:Go于V語(yǔ)言 go語(yǔ)言bufio
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