//@version=6
indicator("Removing key-value pairs demo")

//@function Returns a label to display the keys and values from a map.
method debugLabel(
     map<string, int> this, int barIndex = bar_index,
     color bgColor = color.blue, string note = ""
 ) =>
    //@variable A string representing the size, keys, and values in `this` map.
    string repr = str.format(
         "{0}\nSize: {1}\nKeys: {2}\nValues: {3}",
         note, this.size(), str.tostring(this.keys()), str.tostring(this.values())
     )
    label.new(
         barIndex, 0, repr, color = bgColor, style = label.style_label_center,
         textcolor = color.white, size = size.small
     )

if bar_index == last_bar_index - 1
    //@variable A map containing `string` keys and `int` values.
    m = map.new<string, int>()

    // Put key-value pairs into `m`.
    for [i, key] in array.from("A", "B", "C", "D", "E")
        m.put(key, i)
    m.debugLabel(bar_index, color.green, "Added pairs")

    //@variable An array of keys to remove from `m`.
    array<string> removeKeys = array.from("B", "B", "D", "F", "a")

    // Remove each `key` in `removeKeys` from `m`.
    for key in removeKeys
        m.remove(key)
    m.debugLabel(bar_index + 15, color.red, "Removed pairs")

    // Remove all remaining keys from `m`.
    m.clear()
    m.debugLabel(bar_index + 30, color.purple, "Cleared the map")