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Equation (expression) parser with precedence?
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22 Answers
22
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Saving an Object (Data persistence)
...40)
pickle.dump(company1, output, pickle.HIGHEST_PROTOCOL)
company2 = Company('spam', 42)
pickle.dump(company2, output, pickle.HIGHEST_PROTOCOL)
del company1
del company2
with open('company_data.pkl', 'rb') as input:
company1 = pickle.load(input)
print(company1.name) # -> ...
How do I round to the nearest 0.5?
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208
Multiply your rating by 2, then round using Math.Round(rating, MidpointRounding.AwayFromZero),...
Bind a function to Twitter Bootstrap Modal Close
...Bootstrap 4: getbootstrap.com/docs/4.1/components/modal/#events
Bootstrap 2.3.2
$('#myModal').on('hidden', function () {
// do something…
});
See getbootstrap.com/2.3.2/javascript.html#modals → Events
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What's the safest way to iterate through the keys of a Perl hash?
...eys with doubled values works fine using keys():
%h = (a => 1, b => 2);
foreach my $k (keys %h)
{
$h{uc $k} = $h{$k} * 2;
}
producing the expected resulting hash:
(a => 1, A => 2, b => 2, B => 4)
But using each() to do the same thing:
%h = (a => 1, b => 2);
keys %h...
How can I use map and receive an index as well in Scala?
...ls.zipWithIndex.foreach{ case (e, i) => println(i+" "+e) }
0 Mary
1 had
2 a
3 little
4 lamb
From: http://www.artima.com/forums/flat.jsp?forum=283&thread=243570
You also have variations like:
for((e,i) <- List("Mary", "had", "a", "little", "lamb").zipWithIndex) println(i+" "+e)
or:
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Maven 3 warnings about build.plugins.plugin.version
...lt;artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
The warning should be resolved.
Regarding this:
'build.plugins.plugin.version' for
org.apache.maven.plugins:maven-compiler-plugin is missing
Many people have mentioned why the issue is happeni...
Reading an Excel file in python using pandas
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229
Close: first you call ExcelFile, but then you call the .parse method and pass it the sheet nam...
Analyze audio using Fast Fourier Transform
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209
The array you are showing is the Fourier Transform coefficients of the audio signal. These coe...