去游览，练习：切片指数超出范围

本文介绍了去游览，练习：切片指数超出范围的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 我正在通过Go语言游的练习中工作，我遇到了一个我无法弄清的障碍。我正在做练习：切片，我得到这个错误： 256 x 256 panic：运行时错误：索引超出范围 goroutine 1 [running]： main.Pic（0x10000000100，0x3，0x417062，0x4abf70 ） /tmpfs/gosandbox-08a27793_4ffc9f4a_3b917355_ef23793d_c15d58cc/prog.go:9 + 0xa0 tour / pic.Show（0x400c00，0x40caa2） go / src / pkg / tour / pic / pic.go ：20 + 0x2d main.main（） /tmpfs/gosandbox-08a27793_4ffc9f4a_3b917355_ef23793d_c15d58cc/prog.go:20 + 0x25 以下是我的代码： 包主 导入tour / pic func Pic（dx，dy int）[] [] uint8 { fmt.Printf（％dx％d \\\\\\，dx， dy） 像素：= make（[] [] uint8，0，dy） for y：= 0; y< DY; y ++ { pixels [y] = make（[] uint8，0，dx） for x：= 0; x pixels [y] [x] = uint8（x * y）} } 返回像素} func main（）{ pic.Show（Pic）} 解决方案 切片 对于字符串，数组，指向数组或切片a，主表达式 a [low：high] 构造子字符串或切片。索引表达式低位和高位选择哪些元素出现在结果中。结果索引从0开始，长度等于高 - 低。 对于数组或字符串，索引low和high必须满足0 索引 表单的主要表达形式 a [b] 表示由x索引的数组，切片，字符串或映射的元素。 值x分别被称为索引或映射键。以下规则适用于规则： 对于A或A类型，其中A是数组类型或S 类型，其中S是切片类型： x必须是整数值并且0 a [x]是索引x处的数组元素，a [x]的类型是 A 的元素类型，如果a是零，或者如果索引x超出范围，运行时恐慌发生 制作切片，地图和频道 （T，n）长度为n且容量为n 的T型片段（T，n，m）长度为n且容量为m 的T型片段 y必须是整数值并且0 包主 导入tour / pic func Pic（dx，dy int）[] [] uint8 { pixels：= make（[] [] uint8，dy） for y：= 0; y< DY; y ++ { pixels [y] = make（[] uint8，dx） for x：= 0; x pixels [y] [x] = uint8（x * y）} } 返回像素} func main（）{ pic.Show（Pic）} I am working through the excercises in the Go language tour and I have hit a snag that I can't figure out. I'm doing Exercise: Slices and I am getting this error:256 x 256panic: runtime error: index out of rangegoroutine 1 [running]:main.Pic(0x10000000100, 0x3, 0x417062, 0x4abf70) /tmpfs/gosandbox-08a27793_4ffc9f4a_3b917355_ef23793d_c15d58cc/prog.go:9 +0xa0tour/pic.Show(0x400c00, 0x40caa2) go/src/pkg/tour/pic/pic.go:20 +0x2dmain.main() /tmpfs/gosandbox-08a27793_4ffc9f4a_3b917355_ef23793d_c15d58cc/prog.go:20 +0x25Here is my code:package mainimport "tour/pic"func Pic(dx, dy int) [][]uint8 { fmt.Printf("%d x %d\n\n", dx, dy)pixels := make([][]uint8, 0, dy)for y := 0; y < dy; y++ { pixels[y] = make([]uint8, 0, dx) for x := 0; x < dx; x++ { pixels[y][x] = uint8(x*y) }}return pixels}func main() { pic.Show(Pic)}For the life of me I can't find the issue! 解决方案 Slices For a string, array, pointer to array, or slice a, the primary expression a[low : high] constructs a substring or slice. The index expressions low and high select which elements appear in the result. The result has indexes starting at 0 and length equal to high - low. For arrays or strings, the indexes low and high must satisfy 0 <= low <= high <= length; for slices, the upper bound is the capacity rather than the length. Indexes A primary expression of the form a[x] denotes the element of the array, slice, string or map a indexed by x. The value x is called the index or map key, respectively. The following rules apply: For a of type A or *A where A is an array type, or for a of type S where S is a slice type:x must be an integer value and 0 <= x < len(a)a[x] is the array element at index x and the type of a[x] isthe element type of Aif a is nil or if the index x is out of range, a run-time panic occursMaking slices, maps and channelsmake(T, n) slice slice of type T with length n and capacity nmake(T, n, m) slice slice of type T with length n and capacity my must be an integer value and 0 <= y < len(pixel[]uint8). x must be an integer value and 0 <= x < len(pixel[][]uint8). For example,package mainimport "tour/pic"func Pic(dx, dy int) [][]uint8 { pixels := make([][]uint8, dy) for y := 0; y < dy; y++ { pixels[y] = make([]uint8, dx) for x := 0; x < dx; x++ { pixels[y][x] = uint8(x * y) } } return pixels}func main() { pic.Show(Pic)} 这篇关于去游览，练习：切片指数超出范围的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！