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    <div class="moz-cite-prefix">On 10/16/19 4:17 AM, Artyom Shalkhakov
      wrote:<br>
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cite="mid:CAKO6=qj8nmQCVQJUjp5fyTRTNNuB3cLowWmm8ZPE8ZqkdTim=Q@mail.gmail.com">
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      <div dir="ltr">I think this is what you are looking for:<br>
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        <div><a
            href="https://github.com/vizziv/UrLib/blob/master/UrLib/record.urs#L36"
            moz-do-not-send="true">https://github.com/vizziv/UrLib/blob/master/UrLib/record.urs#L36</a></div>
        <div><a
            href="https://github.com/vizziv/UrLib/blob/master/UrLib/record.ur#L23"
            moz-do-not-send="true">https://github.com/vizziv/UrLib/blob/master/UrLib/record.ur#L23</a></div>
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        <div>It would be very nice if we as a community were to come up
          with a "batteries included" library for Ur/Web.<br>
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    The equivalent code I maintain is <a moz-do-not-send="true"
      href="https://github.com/achlipala/upo/blob/master/record.urs">in
      UPO</a>, though I didn't bother to define this particular
    operator, since, as Mark showed us, it is so directly expressed with
    built-in operators.<br>
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