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<p>Hi all! :-)</p>
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<p>> <span style="font-size: 12pt;">Woah! This works? When and why is this useful? Does anybody recall the prime example? :-) #inject:into:?</span></p>
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<div class="_rp_T4" id="Item.MessagePartBody">Yes, I believe I once used it with #inject:into:, but I don't remember. What prime example are you referring to? :)
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<div class="_rp_T4" id="Item.MessagePartBody">My personal favorite is:</div>
<div class="_rp_T4" id="Item.MessagePartBody"><span>Matrix rows: 5 columns: 6 tabulate: #@ "for quickly setting up an example matrix :-)"</span></div>
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<div class="_rp_T4" id="Item.MessagePartBody"><span>I find it rather confusing that the following does not work:</span></div>
<div class="_rp_T4" id="Item.MessagePartBody"><span>
<div>#raisedTo: value: 2 value: 3. "works"</div>
<div>#raisedTo:modulo: value: 2 value: 3 value: 4. "does not understand"</div>
<div>This is an inconsistency.</div>
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<div class="_rp_T4" id="Item.MessagePartBody"><span>@Eliot:</span></div>
<div class="_rp_T4" id="Item.MessagePartBody"><span>> </span><span style="color: rgb(33, 33, 33); font-family: wf_segoe-ui_normal, "Segoe UI", "Segoe WP", Tahoma, Arial, sans-serif, serif, EmojiFont; font-size: 15px;">Can you give some examples of where you
find you are needing to do this?</span><span>
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<div>Actually, I was trying something like this:</div>
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<div>SequenceableCollection >> #collectX: aBlock</div>
<div><span style="font-size: 12pt; white-space: pre;"></span>^ <span style="font-size: 12pt;">aBlock numArgs = 2</span><br>
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<div><span style="white-space:pre"></span>ifTrue: [self withIndexCollect: aBlock]</div>
<div><span style="white-space:pre"></span>ifFalse: [self collect: aBlock]].</div>
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<div>Now you can say:</div>
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<div>#(1 2 3) collectX: [:x | x squared].</div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">#(1 2 3) collectX: #squared.</span><br>
</div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">#(1 2 3) collectX: [:x :i | x + i]</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">.</span><br>
</span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">But the following does not work:</span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">#(1
2 3) collectX: #+</span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">.</span><br>
</span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><br>
</span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">Maybe
I would rather need something like #value:cull: for an optional second argument?</span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><br>
</span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">In
general, from the point of scripting convenience, I would love Symbol to support many more protocols of BlockClosure. What about:</span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">
<div>Symbol >> #asBlock</div>
<div><span style="white-space:pre"></span>^ self numArgs caseOf: {</div>
<div><span style="white-space:pre"></span>[0] -> [[:rcvr | rcvr perform: self]].</div>
<div><span style="white-space:pre"></span>[1] -> [[:rcvr :arg | rcvr perform: self with: arg]].</div>
<div><span style="white-space:pre"></span>[2] -> [[:rcrv :arg1 :arg2 | rcrv perform: self with: arg1 with: arg2]].</div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px; white-space: pre;"></span>... }</div>
<br>
</span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">Then
I could say at least:</span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span>#(1
2 3) collectX: #+ asBlock.</span><br>
</span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span>And
also:</span></span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">#raisedTo:modulo:
asBlock value: 2 value: 3 value: 4. "does not </span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">understand"</span><br>
</span></span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><br>
</span></span></span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">Best,</span></span></span></span></span></div>
<div><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;"><span><span style="font-family: Calibri, Arial, Helvetica, sans-serif; font-size: 16px;">Christoph</span></span></span></span></span></div>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Von:</b> Squeak-dev <squeak-dev-bounces@lists.squeakfoundation.org> im Auftrag von Taeumel, Marcel<br>
<b>Gesendet:</b> Montag, 16. Dezember 2019 09:22:42<br>
<b>An:</b> John Pfersich via Squeak-dev<br>
<b>Betreff:</b> Re: [squeak-dev] String >> #numArgs</font>
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<div id="__MailbirdStyleContent" style="font-size: 10pt;font-family: Arial;color: #000000">
> <span style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px">bar := #raisedTo:.</span>
<div style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px">> bar value: 2 value: 3. </div>
<div style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px"><br>
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<div style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px">Woah! This works? When and why is this useful? Does anybody recall the prime example? :-) #inject:into:?</div>
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<div style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px">I mean, "bar numArgs" works as expected and so does "foo numArgs". That #value:value: on Symbol is surprising for me here.</div>
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<div style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px">Best,</div>
<div style="font-family: Calibri, Helvetica, sans-serif;font-size: 16px">Marcel</div>
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<p style="color: #AAAAAA; margin-top: 10px;">Am 16.12.2019 04:57:56 schrieb John Pfersich via Squeak-dev <squeak-dev@lists.squeakfoundation.org>:</p>
<div style="font-family:Arial,Helvetica,sans-serif">Besides 2 raisedTo: 3 should answer 8, not 5.<br>
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<blockquote type="cite" style="min-width: 500px">On Dec 15, 2019, at 03:15, Thiede, Christoph <Christoph.Thiede@student.hpi.uni-potsdam.de> wrote:<br>
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<p>Hi all!</p>
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<p>Consider the following:</p>
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<div>foo := [:a :b | a raisedTo: b].</div>
<div>bar := #raisedTo:.</div>
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<div>foo value: 2 value: 3. "5"</div>
<div>bar value: 2 value: 3. "5"</div>
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<div>foo numArgs. <span style="background-color: rgb(255, 255, 0);">"2"</span></div>
<div>bar numArgs. <span style="background-color: rgb(255, 255, 0);">"1"</span></div>
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<p></p>
<p>How can I overcome this inconsistency?</p>
<p>In situations where a symbol acts as "evaluable", quaking like a block, it is confusing to get these different results</p>
<p>Does there already exist a unified protocol? Or am I doing something wrong in general when I need this?</p>
<p><br>
</p>
<p>Best,</p>
<p>Christoph</p>
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