重复文本生成

复制import sys

def repeat_text(text: str, count: int, separator: str = "") -> str:
    """重复文本，用指定分隔符连接。"""
    if count < 0:
        raise ValueError("count must be non-negative")
    return separator.join([text] * count)

# 示例
print(repeat_text("Hello", 3, ", "))  # Hello, Hello, Hello
print(repeat_text("AB", 5))            # ABABABABAB
print(repeat_text("x", 0))             # (空字符串)

复制package main

import (
	"fmt"
	"strings"
)

func repeatText(text string, count int, separator string) string {
	if count < 0 {
		panic("count must be non-negative")
	}
	// 用切片避免 strings.Repeat 不支持分隔符的限制
	parts := make([]string, count)
	for i := 0; i < count; i++ {
		parts[i] = text
	}
	return strings.Join(parts, separator)
}

func main() {
	fmt.Println(repeatText("Hello", 3, ", ")) // Hello, Hello, Hello
	fmt.Println(repeatText("AB", 5))           // ABABABABAB
	fmt.Println(repeatText("x", 0))            // (空字符串)
}

复制function repeatText(text, count, separator = '') {
  if (count < 0) throw new Error('count must be non-negative');
  // Array(count).fill(text) 生成指定长度的数组，join 用分隔符连接
  return Array(count).fill(text).join(separator);
}

console.log(repeatText('Hello', 3, ', ')); // Hello, Hello, Hello
console.log(repeatText('AB', 5));           // ABABABABAB
console.log(repeatText('x', 0));            // (空字符串)