How to Efficiently Remove Newline Characters from Lines in Go?

Removing Newline Characters from Lines

When working with text files, it's common to encounter newline characters (n) at the end of lines. Removing these characters can be necessary for specific processing tasks.

In your provided Go snippet:

for {
    read_line, _ := ReadString('\n')
    fmt.Print(read_line)
}

The ReadString function reads characters until it encounters a specific delimiter, in this case, the newline character. However, the newline character itself is included in the result.

To remove the newline character, one approach suggested in your question was to slice off the last character:

read_line = read_line[:len(read_line)-1]

This method works by slicing the string to exclude the last character. However, this approach can become inefficient if the lines are very long, as it has to copy the entire string each time.

A more efficient solution is to use the strings library and the TrimSuffix function:

read_line = strings.TrimSuffix(read_line, "\n")

TrimSuffix removes the suffix (in this case, the newline character) from the end of the string, without creating a new string. This approach is less resource-intensive and therefore more scalable for large text files.

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