void main() {
    import std.string : split;
    import std.algorithm.searching : startsWith;

    string bk="Exo";

    assert(("Gen Exo Lev Num Deu Jos Judg Rut 1Sam 2Sam".split~
            "1Kin 2Kin 1Chr 2Chr Ezra Neh Est Job Psa Pro Ecc Son Isa Jer".split~
            "Lam Eze Dan Hos Joel Amos Oba Jon Mic Nah Hab Zep Hag Zec".split~
	        "Mal Mat Mar Luk Joh Act Rom 1Cor 2Cor Gal Eph Phili Col".split~
	        "1The 2The Titu Phile Heb Jam 1Pet 2Pet 1Joh 2Joh 3Joh Jude Rev".split)
            .startsWith(bk));
}

Why doesn't this work? canFind works though.

On Sunday, 1 October 2023 at 05:33:36 UTC, Joel wrote:

void main() {
    import std.string : split;
    import std.algorithm.searching : startsWith;

    string bk="Exo";

    assert(("Gen Exo Lev Num Deu Jos Judg Rut 1Sam 2Sam".split~
            "1Kin 2Kin 1Chr 2Chr Ezra Neh Est Job Psa Pro Ecc Son Isa Jer".split~
            "Lam Eze Dan Hos Joel Amos Oba Jon Mic Nah Hab Zep Hag Zec".split~
	        "Mal Mat Mar Luk Joh Act Rom 1Cor 2Cor Gal Eph Phili Col".split~
	        "1The 2The Titu Phile Heb Jam 1Pet 2Pet 1Joh 2Joh 3Joh Jude Rev".split)
            .startsWith(bk));
}

Because it starts with Gen, not Exo.