StringBuilder extension with Kotlin

StringBuilder.kt

fun StringBuilder.write(
    vararg objects: Any?,
    sep: String = "",
    end: String = "",
    prefix: String = "",
    postfix: String = ""
) {
    append(objects.joinToString(separator = sep, prefix = prefix, postfix = postfix)+end)
}

fun StringBuilder.writeln(vararg objects: Any?, sep: String = "", end: String = "", prefix: String = "", postfix: String = "") {
    append(objects.joinToString(separator = sep, prefix = prefix, postfix = postfix)+end+"\n")
}

fun StringBuilder.writelns(vararg objects: Any?, sep: String = "", end: String = "", prefix: String = "", postfix: String = "") {
    append(objects.joinToString(separator = sep+"\n", prefix = prefix, postfix = postfix)+end)
}

fun StringBuilder.writeElement(vararg objects: Any?, tag: String = "p", sep: String = "", end: String = "\n") {
    append(objects.joinToString(separator = sep, prefix = "<$tag>", postfix = "</$tag>")+end)
}

fun stringBuild(
    vararg objects: Any?,
    sep: String = "",
    end: String = "",
    prefix: String = "",
    postfix: String = ""
) = StringBuilder(objects.joinToString(separator = sep, prefix = prefix, postfix = postfix)+end)

SuperStringBuilder.kt

/*
 * Copyright (c) 2021 by Prannaya Gupta
 */

class SuperStringBuilder(val builder: StringBuilder = StringBuilder()) {
    constructor(
        vararg objects: Any?,
        sep: String = "",
        end: String = "",
        prefix: String = "",
        postfix: String = ""
    ): this(StringBuilder(objects.joinToString(separator = sep, prefix = prefix, postfix = postfix)+end))

    fun write(
        vararg objects: Any?,
        sep: String = "",
        end: String = "",
        prefix: String = "",
        postfix: String = ""
    ) {
        builder.append(objects.joinToString(separator = sep, prefix = prefix, postfix = postfix)+end)
    }

    fun writeln(vararg objects: Any?, sep: String = "", end: String = "", prefix: String = "", postfix: String = "") {
        builder.append(objects.joinToString(separator = sep, prefix = prefix, postfix = postfix)+end+"\n")
    }

    fun writelns(vararg objects: Any?, sep: String = "", end: String = "", prefix: String = "", postfix: String = "") {
        builder.append(objects.joinToString(separator = sep+"\n", prefix = prefix, postfix = postfix)+end)
    }

    fun writeElement(vararg objects: Any?, tag: String = "p", sep: String = "", end: String = "\n") {
        builder.append(objects.joinToString(separator = sep, prefix = "<$tag>", postfix = "</$tag>")+end)
    }

    override fun toString() = builder.toString()

}

TableMaker.kt

fun makeTable(list: List<List<Any?>>, border: Double = 1.0) = run {
    val builder = SuperStringBuilder(
        "<table border=\"${border}\">",
        "<tr>",
        sep="\n"
    )

    list.forEach { row ->
        row.forEach { element ->
            builder.writeElement(element, tag="td", end="\n")
        }
        builder.writeln("</tr>", "<tr>", sep="\n")
    }

    builder.writeln("<tr>", "<table>")

    builder.toString()
}