path: root/html/counters.mu.html



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<span class="Comment"># example program: maintain multiple counters with isolated lexical scopes</span>
<span class="Comment"># (spaces)</span>

<span class="muRecipe">def</span> new-counter n:num<span class="muRecipe"> -&gt; </span><span class="Constant">default-space</span>:space [
  <span class="Constant">default-space</span> <span class="Special">&lt;-</span> new <span class="Constant">location:type</span>,<span class="Constant"> 30</span>
  <span class="Constant">load-ingredients</span>
]

<span class="muRecipe">def</span> increment-counter outer:space/names:new-counter, x:num<span class="muRecipe"> -&gt; </span>n:num/space:1 [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  0:space/names:new-counter <span class="Special">&lt;-</span> copy outer  <span class="Comment"># setup outer space; it *must* come from 'new-counter'</span>
  n/space:1 <span class="Special">&lt;-</span> add n/space:1, x
]

<span class="muRecipe">def</span> main [
  <span class="Constant">local-scope</span>
  <span class="Comment"># counter A</span>
  a:space <span class="Special">&lt;-</span> new-counter<span class="Constant"> 34</span>
  <span class="Comment"># counter B</span>
  b:space <span class="Special">&lt;-</span> new-counter<span class="Constant"> 23</span>
  <span class="Comment"># increment both by 2 but in different ways</span>
  increment-counter a,<span class="Constant"> 1</span>
  b-value:num <span class="Special">&lt;-</span> increment-counter b,<span class="Constant"> 2</span>
  a-value:num <span class="Special">&lt;-</span> increment-counter a,<span class="Constant"> 1</span>
  <span class="Comment"># check results</span>
  $print <span class="Constant">[Contents of counters]</span>, <span class="Constant">10/newline</span>
  $print <span class="Constant">[a: ]</span>, a-value, <span class="Constant">[ b: ]</span>, b-value,  <span class="Constant">10/newline</span>
]
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<pre id='vimCodeElement'>
<span class="Comment"># example program: maintain multiple counters with isolated lexical scopes</span>
<span class="Comment"># (spaces)</span>

<span class="muRecipe">def</span> new-counter n:num<span class="muRecipe"> -&gt; </span><span class="Constant">default-space</span>:space [
  <span class="Constant">default-space</span> <span class="Special">&lt;-</span> new <span class="Constant">location:type</span>,<span class="Constant"> 30</span>
  <span class="Constant">load-ingredients</span>
]

<span class="muRecipe">def</span> increment-counter outer:space/names:new-counter, x:num<span class="muRecipe"> -&gt; </span>n:num/space:1 [
  <span class="Constant">local-scope</span>
  <span class="Constant">load-ingredients</span>
  0:space/names:new-counter <span class="Special">&lt;-</span> copy outer  <span class="Comment"># setup outer space; it *must* come from 'new-counter'</span>
  n/space:1 <span class="Special">&lt;-</span> add n/space:1, x
]

<span class="muRecipe">def</span> main [
  <span class="Constant">local-scope</span>
  <span class="Comment"># counter A</span>
  a:space <span class="Special">&lt;-</span> new-counter<span class="Constant"> 34</span>
  <span class="Comment"># counter B</span>
  b:space <span class="Special">&lt;-</span> new-counter<span class="Constant"> 23</span>
  <span class="Comment"># increment both by 2 but in different ways</span>
  increment-counter a,<span class="Constant"> 1</span>
  b-value:num <span class="Special">&lt;-</span> increment-counter b,<span class="Constant"> 2</span>
  a-value:num <span class="Special">&lt;-</span> increment-counter a,<span class="Constant"> 1</span>
  <span class="Comment"># check results</span>
  $print <span class="Constant">[Contents of counters]</span>, <span class="Constant">10/newline</span>
  $print <span class="Constant">[a: ]</span>, a-value, <span class="Constant">[ b: ]</span>, b-value,  <span class="Constant">10/newline</span>
]
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