在GoLang和Rust中初始化字符串数组

Question

I want to initialize a 2D array in which each member of inner array holds a string of 1000 x's. Something like:

var data = [num_rows][num_cols]string("x....x(upto 1000)")

But all google searches have been futile. In C++ I can achieve similar thing like this:

vector<vector<string>> data(num_rows, vector<string>(num_cols, string("x",1000)));

And in Ruby something like this:

Array.new(num_rows) { Array.new(num_cols) { "x"*1000 } }

Want to achieve similar result in go but I am unable to find any documentation to fill a string and initialize a 2D array. Also note that I want to generate the string for each member of array rather than using an available string.

PS : I am also looking for something similar in Rust

Answer 1

you could use slices. this may not be the shortest solution, but it works for me.

package main

import (
    "fmt"
    "strings"
)

func main() {
    xs := strings.Repeat("x", 1000)

    num_rows := 5
    num_cols := 5

    data := make([][]string, num_rows)
    for y := 0; y < num_rows; y++ {
        data[y] = make([]string, num_cols)
        for x := 0; x < num_cols; x++ {
            data[y][x] = xs
        }
    }

    fmt.Printf("%T", data)
    fmt.Print(data)
}