How to resolve the algorithm CSV to HTML translation step by step in the F# programming language

Published on 12 May 2024 09:40 PM
#F_Sharp

How to resolve the algorithm CSV to HTML translation step by step in the F# programming language

Table of Contents

Problem Statement

Consider a simplified CSV format where all rows are separated by a newline and all columns are separated by commas. No commas are allowed as field data, but the data may contain other characters and character sequences that would normally be   escaped   when converted to HTML

Create a function that takes a string representation of the CSV data and returns a text string of an HTML table representing the CSV data. Use the following data as the CSV text to convert, and show your output.

Optionally allow special formatting for the first row of the table as if it is the tables header row (via preferably; CSS if you must).

Let's start with the solution:

Step by Step solution about How to resolve the algorithm CSV to HTML translation step by step in the F# programming language

Source code in the fsharp programming language

open System
open System.Text
open System.Xml

let data = """
Character,Speech
The multitude,The messiah! Show us the messiah!
Brians mother,<angry>Now you listen here! He's not the messiah; he's a very naughty boy! Now go away!</angry>
The multitude,Who are you?
Brians mother,I'm his mother; that's who!
The multitude,Behold his mother! Behold his mother!
"""

let csv =
    Array.map
        (fun (line : string) -> line.Split(','))
        (data.Trim().Split([|'\n';'\r'|],StringSplitOptions.RemoveEmptyEntries))


[<EntryPoint>]
let main argv =
    let style = argv.Length > 0 && argv.[0] = "-h"
    Console.OutputEncoding <- UTF8Encoding()
    let xs = XmlWriterSettings()
    xs.Indent <- true   // be friendly to humans
    use x = XmlWriter.Create(Console.Out, xs)
    x.WriteStartDocument()
    x.WriteDocType("HTML", null, null, null)    // HTML5
    x.WriteStartElement("html")
    x.WriteStartElement("head")
    x.WriteElementString("title", "Rosettacode - CSV to HTML translation")
    if style then
        x.WriteStartElement("style"); x.WriteAttributeString("type", "text/css")
        x.WriteString("""
            table { border-collapse: collapse; }
            td, th { border: 1px solid black; padding: .25em}
            th { background-color: #EEE; }
            tbody th { font-weight: normal; font-size: 85%; }
        """)        
        x.WriteEndElement() // style
    x.WriteEndElement() // head
    x.WriteStartElement("body")
    x.WriteStartElement("table")
    x.WriteStartElement("thead"); x.WriteStartElement("tr")
    for part in csv.[0] do x.WriteElementString("th", part)
    x.WriteEndElement(); x.WriteEndElement() // tr thead
    x.WriteStartElement("tbody")
    for line in csv.[1..] do
        x.WriteStartElement("tr")
        x.WriteElementString("th", line.[0])
        x.WriteElementString("td", line.[1])
        x.WriteEndElement() // tr
    x.Close()
    0

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