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Is object empty? [duplicate]

What is the fastest way to check if an object is empty or not? 23 Answers 23 ...
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Best Practice: Software Versioning [closed]

Is there any guideline or standard best practice how to version a software you develop in your spare time for fun, but nevertheless will be used by some people? I think it's necessary to version such software so that you know about with version one is talking about (e.g. for bug fixing, support, and...
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Image Greyscale with CSS & re-color on mouse-over?

I am looking to take an icon that is colored (and will be a link) and turn it greyscale until the user places their mouse over the icon (where it would then color the image). ...
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Using String Format to show decimal up to 2 places or simple integer

I have got a price field to display which sometimes can be either 100 or 100.99 or 100.9, What I want is to display the price in 2 decimal places only if the decimals are entered for that price , for instance if its 100 so it should only show 100 not 100.00 and if the price is 100.2 it should displa...
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Determine font color based on background color

Given a system (a website for instance) that lets a user customize the background color for some section but not the font color (to keep number of options to a minimum), is there a way to programmatically determine if a "light" or "dark" font color is necessary? ...
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Create an empty list in python with certain size

I want to create an empty list (or whatever is the best way) that can hold 10 elements. 15 Answers ...
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how do I insert a column at a specific column index in pandas?

Can I insert a column at a specific column index in pandas? 4 Answers 4 ...
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Concatenate two slices in Go

I'm trying to combine the slice [1, 2] and the slice [3, 4] . How can I do this in Go? 7 Answers ...
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How do you detect Credit card type based on number?

I'm trying to figure out how to detect the type of credit card based purely on its number. Does anyone know of a definitive, reliable way to find this? ...
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How to get a value from a cell of a dataframe?

I have constructed a condition that extract exactly one row from my data frame: 11 Answers ...