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Find the extension of a filename in Ruby

... 167 That's really basic stuff: irb(main):002:0> accepted_formats = [".txt", ".pdf"] => [".t...
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How to delete last character from a string using jQuery?

How to delete last character from a string for instance in 123-4- when I delete 4 it should display 123- using jQuery . ...
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Converting JSON String to Dictionary Not List

...cess your dictionary by accessing item 0 in the list, as shown below: json1_data = json.loads(json1_str)[0] Now you can access the data stored in datapoints just as you were expecting: datapoints = json1_data['datapoints'] I have one more question if anyone can bite: I am trying to take t...
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Creating dataframe from a dictionary where entries have different lengths

Say I have a dictionary with 10 key-value pairs. Each entry holds a numpy array. However, the length of the array is not the same for all of them. ...
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How to add a new audio (not mixing) into a video using ffmpeg?

... Replace audio ffmpeg -i video.mp4 -i audio.wav -map 0:v -map 1:a -c:v copy -shortest output.mp4 The -map option allows you to manually select streams / tracks. See FFmpeg Wiki: Map for more info. This example uses -c:v copy to stream copy (mux) the video. No re-encoding of the video ...
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Quickest way to convert a base 10 number to any base in .NET?

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What is a method that can be used to increment letters?

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Understanding how recursive functions work

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Draw in Canvas by finger, Android

... mPaint.setStrokeCap(Paint.Cap.ROUND); mPaint.setStrokeWidth(12); } public class DrawingView extends View { public int width; public int height; private Bitmap mBitmap; private Canvas mCanvas; private Path mPath; private P...
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What are the special dollar sign shell variables?

... 1398 $1, $2, $3, ... are the positional parameters. "$@" is an array-like construct of all positi...