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Integer cheat sheet
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dessy committed Oct 21, 2011
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</style>

<div class='title'>String</div>
<div class='title'>Integer</div>
<table>
<tr>
<td class='heading'>chop</td>
<td class='heading'>to_r</td>
<td class='example'>
"ladies".chop
5.to_r
<br /><br />
"a lady ".chop
0.5.to_r
<br /><br />
"12345".chop
-8.3.to_r
</td>
</tr>
<tr>
<td class='heading'>*</td>
<td class='heading'>to_s</td>
<td class='example'>
"ladies" * 4
40.to_s
<br /><br />
"a" * 2 * 3
-2.to_s
<br /><br />
4 * "ladies"
0.2.to_s
</td>
</tr>
<tr>
<td class='heading'>downcase</td>
<td class='heading'>.abs</td>
<td class='example'>
"LADieS".downcase
-100.abs
<br /><br />
"learning".downcase
-2 * 4.abs
<br /><br />
"12345".downcase
(-2 * 4).abs
</td>
</tr>
<tr>
<td class='heading'>empty?</td>
<td class='heading'>zero?</td>
<td class='example'>
"".empty?
0.zero?
<br /><br />
"empty".empty?
1.zero?
<br /><br />
" ".empty?
0.0.zero?
</td>
</tr>
<tr>
<td class='heading'>include?</td>
<td class='heading'>ceil</td>
<td class='example'>
"ladieslearningcode".include? "learn"
0.33.ceil
<br /><br />
"ladieslearningcode".include? "edoc"
101.ceil
<br /><br />
"ladieslearningcode".include? ""
0.0001.ceil
</td>
</tr>
<tr>
<td class='heading'>next</td>
<td class='heading'>numerator</td>
<td class='example'>
"a".next
0.75.numerator
<br /><br />
"Z".next
1.75.numerator
<br /><br />
"aa".next
0.25.numerator
</td>
</tr>
<tr>
<td class='heading'>delete</td>
<td class='heading'>denominator</td>
<td class='example'>
"ladieslearningcode".delete "aeiou"
0.75.denominator
<br /><br />
"ladieslearningcode".delete "lady"
1.75.denominator
<br /><br />
"ladieslearningcode".delete ""
0.25.denominator
</td>
</tr>
</table>
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