user5610: I see the <$> notation often in the Plutus/Haskell code but have no idea what it means. I understand that $ alone is a parenthesis replacement. Is <$> similar? Does it suggest enclosing parenthesis?
Example from the deploy.hs script in week 3.

dataToScriptData :: Data -> ScriptData
dataToScriptData (Constr n xs) = ScriptDataConstructor n $ dataToScriptData  xs
dataToScriptData (Map xs)      = ScriptDataMap [(dataToScriptData x, dataToScriptData y) | (x, y)  xs
dataToScriptData (I n)         = ScriptDataNumber n
dataToScriptData (B bs)        = ScriptDataBytes bs

So hard to do a Google search on Haskell's cryptic syntax!

user5926: For Haskell questions of this sort Hoogle is the ultimate resource.
For operators like <$> you need to enclose them in parenthesis eg (<$>).

user382: It's a functor map which is essentially an fmap function for the functor class. This might be of some use: https://www.fpcomplete.com/haskell/tutorial/operators/

5610: <p>I see the &lt;$&gt; notation often in the Plutus/Haskell code but have no idea what it means. I understand that $ alone is a parenthesis replacement. Is &lt;$&gt; similar? Does it suggest enclosing parenthesis?</p>
<p>Example from the deploy.hs script in week 3.</p>
<blockquote><pre>
dataToScriptData :: Data -> ScriptData
dataToScriptData (Constr n xs) = ScriptDataConstructor n $ dataToScriptData  xs
dataToScriptData (Map xs)      = ScriptDataMap [(dataToScriptData x, dataToScriptData y) | (x, y)  xs
dataToScriptData (I n)         = ScriptDataNumber n
dataToScriptData (B bs)        = ScriptDataBytes bs
<p></pre></blockquote></p>
<p>So hard to do a Google search on Haskell's cryptic syntax!</p>
 5926: <p>For Haskell questions of this sort <a href="https://hoogle.hackage.org/" rel="nofollow noreferrer">Hoogle</a> is the ultimate resource.</p>
<p>For operators like <code>&lt;$&gt;</code> you need to enclose them in parenthesis eg <code>(&lt;$&gt;)</code>.</p>
 382: <p>It's a functor map which is essentially an fmap function for the functor class. This might be of some use: <a href="https://www.fpcomplete.com/haskell/tutorial/operators/" rel="noreferrer">https://www.fpcomplete.com/haskell/tutorial/operators/</a></p>
