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How do I replace a character at a particular index in JavaScript?

I have a string, let's say Hello world and I need to replace the char at index 3. How can I replace a char by specifying a index? ...
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ValueError: numpy.dtype has the wrong size, try recompiling

I just installed pandas and statsmodels package on my python 2.7 When I tried "import pandas as pd", this error message comes out. Can anyone help? Thanks!!! ...
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Android Studio - local path doesn't exist

After updating Android Studio to 0.2.4 I can't get my project to deploy. There is a complete mismatch of the apk filename. ...
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Difference between CouchDB and Couchbase

Are there any essential differences between CouchDB and Couchbase . 3 Answers 3 ...
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JavaScript pattern for multiple constructors

...ors. If you want a function to behave differently depending on the number and types of parameters you pass to it, you'll have to sniff them manually. JavaScript will happily call a function with more or fewer than the declared number of arguments. function foo(a, b) { if (b===undefined) // par...
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Fast way to get image dimensions (not filesize)

I'm looking for a fast way to get the height and width of an image in pixels. It should handle at least JPG, PNG and TIFF, but the more the better. I emphasize fast because my images are quite big (up to 250 MB) and it takes soooo long to get the size with ImageMagick's identify because it obv...
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Difference between Activity and FragmentActivity

I was working on fragments and came across two things Activity and FragmentActivity which are used several times. I want to know that is there any difference between these two, because when I changed Activity with FragmentActivity , it had no effect on the app. ...
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Pandas index column title or name

How do I get the index column name in python pandas? Here's an example dataframe: 9 Answers ...
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What is the difference between a .xib file and a .storyboard?

Can someone explain in simple words the difference between .xib and .storyboard? 6 Answers ...
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What is the difference between Reader and InputStream?

What is the difference between Reader and InputStream? And when to use what? If I can use Reader for reading characters why I will use inputstream, I guess to read objects? ...