In the following examples, what does the "L" stand for. How could I have found out without bothering you for what is probably a simple matter<div><br></div><div><span class="Apple-style-span" style="border-collapse: separate; font-family: Arial; -webkit-border-horizontal-spacing: 0px; -webkit-border-vertical-spacing: 0px; font-size: medium; "><span class="Apple-style-span" style="font-family: sans-serif; font-size: 13px; "><pre>
DT[,z:=42L] # add new column by reference
DT[,z:=NULL] # remove column
DT["a",v:=42L] # subassign v by reference</pre></span></span>Farrel Buchinsky<br><br><br>
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