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How do I obtain the frequencies of each value in an FFT?

... an FFT result. These are stored in two double arrays: a real part array and an imaginary part array. How do I determine the frequencies that correspond to each element in these arrays? ...
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Sass calculate percent minus px

... No argument there, but count the browsers! More support calc() than not, and even more will support it in the near future! – chrisgonzalez Feb 13 '13 at 17:20 5 ...
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iterating over each character of a String in ruby 1.8.6 (each_char)

I am new to ruby and currently trying to operate on each character separately from a base String in ruby. I am using ruby 1.8.6 and would like to do something like: ...
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Binding a WPF ComboBox to a custom list

... You set the DisplayMemberPath and the SelectedValuePath to "Name", so I assume that you have a class PhoneBookEntry with a public property Name. Have you set the DataContext to your ConnectionViewModel object? I copied you code and made some minor modif...
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Testing if jQueryUI has loaded

I'm trying to debug a website, and I think that jQueryUI may not have loaded properly. How can I test if jQueryUI has loaded? ...
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Replace None with NaN in pandas dataframe

... which will replace the Python object None, not the string 'None'. import pandas as pd import numpy as np For dataframe: df = df.fillna(value=np.nan) For column or series: df.mycol.fillna(value=np.nan, inplace=True) share...
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What does “1 line adds whitespace errors” mean when applying a patch?

I'm editing some markdown files of a cloned remote repository, and wanted to test creating and applying patches from one branch to another. However, every time I make any change at all, I get the following message during git apply : ...
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MySQL: how to get the difference between two timestamps in seconds

...ence between two timestamps in seconds, or would I need to do that in PHP? And if so, how would I go about doing that? 4 An...
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Get first day of week in PHP?

... but, it means the start and the end of 'this week', right? – Oki Erie Rinaldi Aug 7 '15 at 6:59 ...
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Controlling fps with requestAnimationFrame?

...e for the most part, but right now I'm trying to do some canvas animations and I was wondering: Is there any way to make sure it runs at a certain fps? I understand that the purpose of rAF is for consistently smooth animations, and I might run the risk of making my animation choppy, but right now it...