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Assignment1.html
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<!DOCTYPE html>
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<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta name="generator" content="Asciidoctor 2.0.10">
<meta name="author" content="Michael Partridge">
<title>HW 1</title>
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</head>
<body class="article">
<div id="header">
<h1>HW 1</h1>
<div class="details">
<span id="author" class="author">Michael Partridge</span><br>
<span id="email" class="email"><a href="mailto:[email protected]">[email protected]</a></span><br>
<span id="revdate">8.27.20</span>
</div>
</div>
<div id="content">
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>Hey Igor! I’ve been playing with <a href="https://asciidoctor.org/">Asciidoctor</a> lately. GitHub supports it (but not fully). I’m not sure any of the features are useful for this task, but it’s been awesome to use to create pdfs. I’ve even been using it for really simple slide shows. All through emacs! No more dragging, aligning, changing font sizes. The beauty is that you can type all your documents in markup, and can output to <a href="https://github.com/mcp292/INF502/blob/master/Assignment1.pdf">PDF</a> or <a href="https://htmlpreview.github.io/?https://github.com/mcp292/INF502/blob/master/Assignment1.html">HTML</a> with really nice defaults (linked to output). The <a href="https://asciidoctor.org/docs/asciidoc-syntax-quick-reference/">Quick Reference</a> shows the syntax. I’ve really been geeking out over it lately! Back to the HW!</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_problem_1">Problem 1</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="title">Source (notice how this title renders in <a href="https://github.com/mcp292/INF502/blob/master/Assignment1.pdf">PDF</a> and <a href="https://htmlpreview.github.io/?https://github.com/mcp292/INF502/blob/master/Assignment1.html">HTML</a>)</div>
<div class="content">
<pre class="rouge highlight"><code data-lang="python"><span class="kn">from</span> <span class="nn">math</span> <span class="kn">import</span> <span class="n">hypot</span>
<span class="k">def</span> <span class="nf">pythagoreanTheorem</span><span class="p">(</span><span class="n">length_a</span><span class="p">,</span> <span class="n">length_b</span><span class="p">):</span>
<span class="k">return</span> <span class="n">hypot</span><span class="p">(</span><span class="n">length_a</span><span class="p">,</span> <span class="n">length_b</span><span class="p">)</span>
<span class="k">print</span><span class="p">(</span><span class="n">pythagoreanTheorem</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">2</span><span class="p">))</span>
<span class="k">print</span><span class="p">(</span><span class="n">pythagoreanTheorem</span><span class="p">(</span><span class="mi">3</span><span class="p">,</span> <span class="mi">2</span><span class="p">))</span>
<span class="k">print</span><span class="p">(</span><span class="n">pythagoreanTheorem</span><span class="p">(</span><span class="mi">2</span><span class="p">,</span> <span class="mi">4</span><span class="p">))</span></code></pre>
</div>
</div>
<div class="listingblock">
<div class="title">Output (it also supports <a href="https://asciidoctor.org/docs/asciidoc-vs-markdown/#comparison-by-example">some</a> markdown syntax (<code>```</code>))</div>
<div class="content">
<pre class="rouge highlight"><code data-lang="sh">2.8284271247461903
3.6055512754639896
4.47213595499958</code></pre>
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</div>
</div>
</div>
<div class="sect1">
<h2 id="_problem_2">Problem 2</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="title">Source</div>
<div class="content">
<pre class="rouge highlight"><code data-lang="python"><span class="k">def</span> <span class="nf">list_mangler</span><span class="p">(</span><span class="n">list_in</span><span class="p">):</span>
<span class="n">list_out</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">item</span> <span class="ow">in</span> <span class="n">list_in</span><span class="p">:</span>
<span class="c1"># even
</span> <span class="k">if</span> <span class="p">(</span><span class="n">item</span> <span class="o">%</span> <span class="mi">2</span> <span class="o">==</span> <span class="mi">0</span><span class="p">):</span>
<span class="n">list_out</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">item</span> <span class="o">*</span> <span class="mi">2</span><span class="p">)</span>
<span class="c1"># odd
</span> <span class="k">else</span><span class="p">:</span>
<span class="n">list_out</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">item</span> <span class="o">*</span> <span class="mi">3</span><span class="p">)</span>
<span class="k">return</span> <span class="n">list_out</span></code></pre>
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<div class="listingblock">
<div class="title">Output</div>
<div class="content">
<pre class="rouge highlight"><code data-lang="python"><span class="k">print</span><span class="p">(</span><span class="n">list_mangler</span><span class="p">([</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">4</span><span class="p">]))</span>
<span class="k">print</span><span class="p">(</span><span class="n">list_mangler</span><span class="p">([</span><span class="mi">5</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="mi">7</span><span class="p">,</span> <span class="mi">8</span><span class="p">]))</span>
<span class="k">print</span><span class="p">(</span><span class="n">list_mangler</span><span class="p">([</span><span class="mi">9</span><span class="p">,</span> <span class="mi">10</span><span class="p">,</span> <span class="mi">11</span><span class="p">,</span> <span class="mi">110</span><span class="p">,</span> <span class="mi">111</span><span class="p">]))</span></code></pre>
</div>
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<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="sh"><span class="o">[</span>3, 4, 9, 8]
<span class="o">[</span>15, 12, 21, 16]
<span class="o">[</span>27, 20, 33, 220, 333]</code></pre>
</div>
</div>
<div class="paragraph">
<div class="title">Explanation</div>
<p>A number is even if it’s divisible by 2, odd otherwise.</p>
</div>
<div class="listingblock">
<div class="title"><a href="https://docs.python.org/3/tutorial/datastructures.html#list-comprehensions">Alternative way</a> is interesting but hurts my head</div>
<div class="content">
<pre class="rouge highlight"><code data-lang="python"><span class="n">squares</span> <span class="o">=</span> <span class="p">[</span><span class="n">x</span><span class="o">**</span><span class="mi">2</span> <span class="k">for</span> <span class="n">x</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="mi">10</span><span class="p">)]</span></code></pre>
</div>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_problem_3">Problem 3</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="title">Source</div>
<div class="content">
<pre class="rouge highlight"><code data-lang="python"><span class="kn">from</span> <span class="nn">statistics</span> <span class="kn">import</span> <span class="n">mean</span>
<span class="k">def</span> <span class="nf">grade_calc</span><span class="p">(</span><span class="n">grades_in</span><span class="p">,</span> <span class="n">to_drop</span><span class="p">):</span>
<span class="c1"># leave original list unmodified
</span> <span class="n">grades_out</span> <span class="o">=</span> <span class="n">grades_in</span><span class="o">.</span><span class="n">copy</span><span class="p">()</span>
<span class="c1"># sort and drop lowest `to_drop`
</span> <span class="n">grades_out</span><span class="o">.</span><span class="n">sort</span><span class="p">()</span>
<span class="k">for</span> <span class="nb">iter</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">to_drop</span><span class="p">):</span>
<span class="n">grades_out</span><span class="o">.</span><span class="n">pop</span><span class="p">(</span><span class="mi">0</span><span class="p">)</span>
<span class="c1"># calc avg of modified list
</span> <span class="n">avg</span> <span class="o">=</span> <span class="n">mean</span><span class="p">(</span><span class="n">grades_out</span><span class="p">)</span>
<span class="c1"># give letter grade
</span> <span class="k">if</span> <span class="p">(</span><span class="mi">100</span> <span class="o">>=</span> <span class="n">avg</span> <span class="o">>=</span> <span class="mi">90</span><span class="p">):</span>
<span class="k">return</span> <span class="s">'A'</span>
<span class="k">elif</span> <span class="p">(</span><span class="mi">89</span> <span class="o">>=</span> <span class="n">avg</span> <span class="o">>=</span> <span class="mi">80</span><span class="p">):</span>
<span class="k">return</span> <span class="s">'B'</span>
<span class="k">elif</span> <span class="p">(</span><span class="mi">79</span> <span class="o">>=</span> <span class="n">avg</span> <span class="o">>=</span> <span class="mi">70</span><span class="p">):</span>
<span class="k">return</span> <span class="s">'C'</span>
<span class="k">elif</span> <span class="p">(</span><span class="mi">69</span> <span class="o">>=</span> <span class="n">avg</span> <span class="o">>=</span> <span class="mi">60</span><span class="p">):</span>
<span class="k">return</span> <span class="s">'D'</span>
<span class="k">else</span><span class="p">:</span>
<span class="k">return</span> <span class="s">'F'</span></code></pre>
</div>
</div>
<div class="listingblock">
<div class="title">Output</div>
<div class="content">
<pre class="rouge highlight"><code data-lang="python"><span class="k">print</span><span class="p">(</span><span class="n">grade_calc</span><span class="p">([</span><span class="mi">100</span><span class="p">,</span> <span class="mi">90</span><span class="p">,</span> <span class="mi">80</span><span class="p">,</span> <span class="mi">95</span><span class="p">],</span> <span class="mi">2</span><span class="p">))</span>
<span class="k">print</span><span class="p">(</span><span class="n">grade_calc</span><span class="p">([</span><span class="mi">0</span><span class="p">,</span> <span class="mi">90</span><span class="p">,</span> <span class="mi">80</span><span class="p">,</span> <span class="mi">95</span><span class="p">],</span> <span class="mi">2</span><span class="p">))</span>
<span class="k">print</span><span class="p">(</span><span class="n">grade_calc</span><span class="p">([</span><span class="mi">70</span><span class="p">,</span> <span class="mi">100</span><span class="p">,</span> <span class="mi">60</span><span class="p">,</span> <span class="mi">50</span><span class="p">],</span> <span class="mi">2</span><span class="p">))</span></code></pre>
</div>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="shell">A
A
B</code></pre>
</div>
</div>
<div class="paragraph">
<div class="title">Explanation</div>
<p>I broke the problem up by commenting out what it needs to do. Then I filled in the code. The comments remain. I used the <code>sort()</code> function and the <code>pop()</code> function to remove the lowest. I made a copy of the list before doing so.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="_problem_4">Problem 4</h2>
<div class="sectionbody">
<div class="listingblock">
<div class="title">Source</div>
<div class="content">
<pre class="rouge highlight"><code data-lang="py"><span class="k">def</span> <span class="nf">odd_even_filter</span><span class="p">(</span><span class="n">numbers</span><span class="p">):</span>
<span class="c1"># separate odd and even
</span> <span class="n">even</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">odd</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">num</span> <span class="ow">in</span> <span class="n">numbers</span><span class="p">:</span>
<span class="k">if</span> <span class="p">(</span><span class="n">num</span> <span class="o">%</span> <span class="mi">2</span> <span class="o">==</span> <span class="mi">0</span><span class="p">):</span>
<span class="n">even</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">num</span><span class="p">)</span>
<span class="k">else</span><span class="p">:</span>
<span class="n">odd</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">num</span><span class="p">)</span>
<span class="k">return</span> <span class="p">[</span><span class="n">even</span><span class="p">,</span> <span class="n">odd</span><span class="p">]</span></code></pre>
</div>
</div>
<div class="listingblock">
<div class="title">Output</div>
<div class="content">
<pre class="rouge highlight"><code data-lang="py"><span class="k">print</span><span class="p">(</span><span class="n">odd_even_filter</span><span class="p">([</span><span class="mi">1</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">3</span><span class="p">,</span> <span class="mi">4</span><span class="p">,</span> <span class="mi">5</span><span class="p">,</span> <span class="mi">6</span><span class="p">,</span> <span class="mi">7</span><span class="p">,</span> <span class="mi">8</span><span class="p">,</span> <span class="mi">9</span><span class="p">]))</span>
<span class="k">print</span><span class="p">(</span><span class="n">odd_even_filter</span><span class="p">([</span><span class="mi">3</span><span class="p">,</span> <span class="mi">9</span><span class="p">,</span> <span class="mi">43</span><span class="p">,</span> <span class="mi">7</span><span class="p">]))</span>
<span class="k">print</span><span class="p">(</span><span class="n">odd_even_filter</span><span class="p">([</span><span class="mi">71</span><span class="p">,</span> <span class="mi">39</span><span class="p">,</span> <span class="mi">98</span><span class="p">,</span> <span class="mi">79</span><span class="p">,</span> <span class="mi">5</span><span class="p">,</span> <span class="mi">89</span><span class="p">,</span> <span class="mi">50</span><span class="p">,</span> <span class="mi">90</span><span class="p">,</span> <span class="mi">2</span><span class="p">,</span> <span class="mi">56</span><span class="p">]))</span></code></pre>
</div>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="sh"><span class="o">[[</span>2, 4, 6, 8], <span class="o">[</span>1, 3, 5, 7, 9]]
<span class="o">[[]</span>, <span class="o">[</span>3, 9, 43, 7]]
<span class="o">[[</span>98, 50, 90, 2, 56], <span class="o">[</span>71, 39, 79, 5, 89]]</code></pre>
</div>
</div>
<div class="paragraph">
<div class="title">Explanation</div>
<p>At first I had two loops</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="py"><span class="c1"># make list of all even
</span><span class="n">even</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">num</span> <span class="ow">in</span> <span class="n">numbers</span><span class="p">:</span>
<span class="k">if</span> <span class="p">(</span><span class="n">num</span> <span class="o">%</span> <span class="mi">2</span> <span class="o">==</span> <span class="mi">0</span><span class="p">):</span>
<span class="n">even</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">num</span><span class="p">)</span>
<span class="c1"># make list of all odd
</span><span class="n">odd</span> <span class="o">=</span> <span class="p">[]</span>
<span class="k">for</span> <span class="n">num</span> <span class="ow">in</span> <span class="n">numbers</span><span class="p">:</span>
<span class="k">if</span> <span class="p">(</span><span class="n">num</span> <span class="o">%</span> <span class="mi">2</span> <span class="o">==</span> <span class="mi">1</span><span class="p">):</span>
<span class="n">odd</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">num</span><span class="p">)</span></code></pre>
</div>
</div>
<div class="paragraph">
<p>but then I realized I could use the same loop with an else.</p>
</div>
<div class="paragraph">
<p>I also realized I could simplify the return statement to one line</p>
</div>
<div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="py"><span class="n">output</span> <span class="o">=</span> <span class="p">[]</span>
<span class="n">output</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">even</span><span class="p">)</span>
<span class="n">output</span><span class="o">.</span><span class="n">append</span><span class="p">(</span><span class="n">odd</span><span class="p">)</span>
<span class="k">return</span> <span class="n">output</span></code></pre>
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