25、Go语言标准库功能解析与实践

Go语言标准库功能解析与实践

1. 单词计数示例

以下是一个简单的Go语言单词计数示例代码：

path := `...\words.txt` // point to a real file
counts, err := CountWordsInFile(path)
if err != nil {
    fmt.Printf("Count failed: %v\n", err)
    return
}
fmt.Printf("Counts for %q:\n", path)
for k, v := range counts {
    fmt.Printf("  %-20s = %v\n", k, v)
}

假设文件内容为 Now is the time to come to the aid of our countrymen! ，运行上述代码后输出如下：

Counts for ".../words.txt":
  Now                  = 1
  time                 = 1
  come                 = 1
  countrymen!          = 1
  our                  = 1
  is                   = 1
  the                  = 2
  to                   = 2
  aid                  = 1
  of                   = 1
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