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Show pending migrations in rails
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261
rake db:migrate:status (Rails 3 to 5) or rails db:migrate:status (Rails 5) will accomplish thi...
How do you use the ? : (conditional) operator in JavaScript?
...userType = "Minor";
} else {
userType = "Adult";
}
if (userIsYoungerThan21) {
serveDrink("Grape Juice");
} else {
serveDrink("Wine");
}
This can be shortened with the ?: like so:
var userType = userIsYoungerThan18 ? "Minor" : "Adult";
serveDrink(userIsYoungerThan21 ? "Grape Juice" : "Wine...
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...
How to reshape data from long to wide format
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268
Using reshape function:
reshape(dat1, idvar = "name", timevar = "numbers", direction = "wide"...
Center a column using Twitter Bootstrap 3
How do I center a div of one column size within the container (12 columns) in Twitter Bootstrap 3 ?
34 Answers
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Count number of records returned by group by
... COUNT(*) OVER () AS TotalRecords
from temptable
group by column_1, column_2, column_3, column_4
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Append column to pandas dataframe
...ust looking for a join:
> dat1 = pd.DataFrame({'dat1': [9,5]})
> dat2 = pd.DataFrame({'dat2': [7,6]})
> dat1.join(dat2)
dat1 dat2
0 9 7
1 5 6
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Some built-in to pad a list in python
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oyvind
1,24022 gold badges1111 silver badges2121 bronze badges
answered Aug 9 '10 at 9:43
John La RooyJohn La ...
How do you create nested dict in Python?
I have 2 CSV files: 'Data' and 'Mapping':
4 Answers
4
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What is the correct syntax for 'else if'?
I'm a new Python programmer who is making the leap from 2.6.4 to 3.1.1. Everything has gone fine until I tried to use the 'else if' statement. The interpreter gives me a syntax error after the 'if' in 'else if' for a reason I can't seem to figure out.
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