package main
import "fmt"
type Bar struct {
high float64
low float64
}
func main() {
var bars = []Bar{}
bars = []Bar{
{1.0, 2.0},
{1.1, 2.1},
{1.2, 2.2},
{1.3, 2.3},
{1.4, 2.4},
{1.5, 2.5},
}
fmt.Println(bars)
testFunction(&bars)
}
func testFunction(array *[]Bar) {
for i := 0; i < 3; i++ {
fmt.Println(*array[i])
}
}
https://play.golang.org/p/MZwaFALHfuy
为什么我不能访问数组行?
无效操作:array [i](类型* [] Bar不支持索引)
答案 0 :(得分:4)
将for循环中的行更改为library(data.table)
melt(setDT(x), id=1:2, measure=list(c("t2","t3"), c("y2","y3"), c("se2","se3")),
value.name=c("t2", "y2", "se2"))
#Or in short form
melt(setDT(x), id=1:2, measure=patterns("^t[2-3]", "^y", "^se"),
value.name=c("t2", "y2", "se2"))
# id t1 variable t2 y2 se2
# 1: Study1 1 1 2 0.1 0.5
# 2: Study1 1 2 3 0.2 0.7
fmt.Println((*array)[i])
将尝试取消引用*array[i]
[i]
将取消引用(*array)[i]
,这是您的指针。