x:=[]int{ 1, // 2 //error 3,// ok } y:=[]int{1,2,3,}// ok z:=[]int{1,2,3}// 单行书写,最后一个元素的逗号可省略 22、内置数据结构的操作并不同步,但可把Go提供了并发的特性使用起来:goroutines和channels。 23、使用for range迭代String,是以rune来迭代的。
func TestAdd(t *testing.T) { tests := []struct{ name string first int64 second int64 expected int64 } { { name: "HappyPath": first: 2, second: 3, expected: 5, }, { name: "NegativeNumber": first: -1, second: -1, expected: -2, }, } for _, test := range tests { t.Ru...
1、不允许左大括号单独一行 2、不允许出现未使用的变量 3、不允许出现未使用的import(使用_ 包名引入) 4、短的变量声明(Short Variable Declarations)只能在函数内部使用 // myvar := 1 // error var myvar = 1 // ok 5、不能使用短变量声明(Short Variable Declarations)重复声明 6、不能使用短变量声明(S...
This has vscode markingreqInformeras an error because "expected 1 expression": reqInformer, err : = mgr.GetCache().GetInformer(context.TODO(), req) if err != nil { return nil, errors.WithStack(err) } As you can see in the gif below, the docs show thatGetInformerreturns 2 variables...
one :=0one, two :=1,2one,two = two,one } 偶然的变量隐藏Accidental Variable Shadowing 短式变量声明的语法如此的方便(尤其对于那些使用过动态语言的开发者而言),很容易让人把它当成一个正常的分配操作。如果你在一个新的代码块中犯了这个错误,将不会出现编译错误,但你的应用将不会做你所期望的事情。
Go是一门简单有趣的语言,但与其他语言类似,它会有一些技巧。。。这些技巧的绝大部分并不是Go的缺陷造成的。如果你以前使用的是其他语言,那么这其中的有些错误就是很自然的陷阱。其它的是由错误的假设和缺少细节造成的。
If I make a copy of this branch and change the name to anything that is notv2(e.g.dev,devv2,testv2, ...) it works as expected. To me it looks like there is a bug in how branch names are parsed and a name matching the regular expression^v\d+doesn't work as expected...
func TestAdd(t *testing.T) { tests := []struct{ name string first int64 second int64 expected int64 } { { name: "HappyPath": first: 2, second: 3, expected: 5, }, { name: "NegativeNumber": first: -1, second: -1, expected: -2, }, } for _, test := range tests { t.Ru...
expectedLiteral string}{{LPAREN,"("},{INT,"5"},{PLUS,"+"},{MINUS,"-"},{INT,"10"},{ASTERISK,"*"},{INT,"2"},{PLUS,"+"},{INT,"15"},{SLASH,"/"},{INT,"3"},{RPAREN,")"},{ASTERISK,"*"},{INT,"2"},}l:=NewLex(input)fori,tt:=range tests{tok:=l.NextToken()iftok...
dir1 := path[:sepIndex:sepIndex] //full slice expression dir2 := path[sepIndex+1:] fmt.Println("dir1 =>",string(dir1)) //prints: dir1 => AAAA fmt.Println("dir2 =>",string(dir2)) //prints: dir2 => BBBBBBBBB dir1 =append(dir1,"suffix"...) ...