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<p>Hi Ken,</p>
<p>Indeed. It's removed and noted in 1.8.7, just not on CRAN yet :</p>
<pre>o The J() alias is now removed *outside* DT[...], but will still work inside DT[...];
i.e., DT[J(...)] is fine. As warned in v1.8.2 (see below in this file) and deprecated
with warning() in v1.8.6. This resolves the conflict with function J() in package
XLConnect (#1747) and rJava (#2045).
Please use data.table() directly instead of J(), outside DT[...].</pre>
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<pre>Thanks,</pre>
<pre>Matthew</pre>
<pre> </pre>
<p>On 18.02.2013 19:18, Ken Williams wrote:</p>
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<p class="MsoNormal">I noticed this:</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">================================</p>
<p class="MsoNormal">> J</p>
<p class="MsoNormal">function (...)</p>
<p class="MsoNormal">{</p>
<p class="MsoNormal"> warning("The J alias is deprecated *outside* DT[...] because J() conflicts with the function J() in XLConnect and rJava. Please use data.table() instead, or define an alias yourself. J() will continue to work *inside* DT[...] as documented. This warning is issued from v1.8.3. J() will be unavailable for use outside DT[...] from v1.8.4. Only then will the conflict with rJava and XLConnect be resolved.")</p>
<p class="MsoNormal"> data.table(...)</p>
<p class="MsoNormal">}</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">> packageVersion('data.table')</p>
<p class="MsoNormal">[1] ‘1.8.6’</p>
<p class="MsoNormal">================================</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">Is it time to remove it?</p>
<p class="MsoNormal"> </p>
<p class="MsoNormal"> </p>
<p class="MsoNormal">--</p>
<p class="MsoNormal">Ken Williams, Senior Research Scientist</p>
<p class="MsoNormal"><strong><em><span style="color: #365f91;">Wind</span></em></strong><strong><em><span style="color: #76923c;">Logics</span></em></strong><strong><em></em></strong></p>
<p class="MsoNormal">http://windlogics.com</p>
<p class="MsoNormal"> </p>
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