Method code for $data_lib.unparse_indent()

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arg value;
var s, i, len;

refresh();
switch (type(value)) {
    case 'list:
        if (!value)
            return ["[]"];
        s = map i in [1 .. (len = value.length())] to (.unparse_indent(value[i]).affix(i < len ? "," : "")).sum();
        s ?= [];
        if (s.mmap('length).sum() < 60) {
            return ["[" + s.join() + "]"];
        } else {
            s = s.prefix("  ");
            s = s.replace(1, s[1].subrange(3));
            return ["[ "].affix(s).affix("]");
        }
    case 'dictionary:
        s = map i in [1 .. (len = value.keys().length())] to (.unparse_indent([(value.keys())[i], value[(value.keys())[i]]]).affix(i < len ? "," : "")).sum();
        s ?= [];
        if (s.mmap('length).sum() < 60) {
            return ["#[" + s.join() + "]"];
        } else {
            s = s.prefix("  ");
            s = s.replace(1, s[1].subrange(3));
            return ["#["].affix(s).affix("]");
        }
    case 'frob:
        return ["<"].affix(class(value)).affix(",").affix(.unparse_indent(value.value())).affix(">");
    default:
        return [toliteral(value)];
}

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// Created 07-Dec-1996 as a part of ColdCore, see: @help Credit