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PO
primarykey
Id
5179408
data
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0
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0
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2011-03-03T10:23:45.170
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2011-03-03T13:32:27.123
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2017-05-23T12:34:02.027
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-1
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198315
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5176430
PostTypeId
2
Score
12
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0
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text
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Your revised question is straightforward, simply <pre><code>f @@ {a,b,c,...} == f[a,b,c,...] </code></pre> where <code>@@</code> is shorthand for <a href="http://reference.wolfram.com/mathematica/ref/Apply.html?q=Apply&lang=en" rel="nofollow noreferrer"><code>Apply</code></a>. Internally, <code>{a,b,c}</code> is <code>List[a,b,c]</code> (which you can see by using <a href="http://reference.wolfram.com/mathematica/ref/FullForm.html?q=FullForm&lang=en" rel="nofollow noreferrer"><code>FullForm</code></a> on any expression), and <code>Apply</code> just replaces the <a href="http://reference.wolfram.com/mathematica/ref/Head.html?q=Head&lang=en" rel="nofollow noreferrer"><code>Head</code></a>, <code>List</code>, with a new <code>Head</code>, <code>f</code>, changing the function. The operation of <code>Apply</code> is not limited to lists, in general <pre><code>f @@ g[a,b] == f[a,b] </code></pre> Also, look at <a href="http://reference.wolfram.com/mathematica/ref/Sequence.html?q=Sequence&lang=en" rel="nofollow noreferrer"><code>Sequence</code></a> which does <pre><code>f[Sequence[a,b]] == f[a,b] </code></pre> So, we could do this instead <pre><code>f[ Sequence @@ {a,b}] == f[a,b] </code></pre> which while pedantic seeming can be very useful. Edit: <code>Apply</code> has an optional 2nd argument that specifies a level, i.e. <pre><code>Apply[f, {{a,b},{c,d}}, {1}] == {f[a,b], f[c,d]} </code></pre> Note: the shorthand for <code>Apply[fcn, expr,{1}]</code> is <code>@@@</code>, as discussed <a href="https://stackoverflow.com/questions/1141166/in-mathematica-what-does-mean">here</a>, but to specify any other level description you need to use the full function form.
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