go語(yǔ)言和java,go語(yǔ)言更有前途。
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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。
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'
\ }
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”
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
標(biāo)題路徑:http://www.muchs.cn/article32/dohidsc.html
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