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Given an RGB value, how do I create a tint (or shade)?

... an RGB value, like 168, 0, 255 , how do I create tints (make it lighter) and shades (make it darker) of the color? 3 Answ...
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In Python, when should I use a function instead of a method?

...nt "can't kill it." Moving away from this analogy, why do we use methods and classes? Because we want to contain data and hopefully structure our code in a manner such that it will be reusable and extensible in the future. This brings us to the notion of encapsulation which is so dear to OO design...
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What is the difference between NaN and None?

I am reading two columns of a csv file using pandas readcsv() and then assigning the values to a dictionary. The columns contain strings of numbers and letters. Occasionally there are cases where a cell is empty. In my opinion, the value read to that dictionary entry should be None but instead ...
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Shell command to sum integers, one per line?

I am looking for a command that will accept (as input) multiple lines of text, each line containing a single integer, and output the sum of these integers. ...
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Delete everything in a MongoDB database

...way everything in a database—that is, to delete every single collection, and whatever else might be lying around, and start from scratch. Is there a single line of code that will let me do this? Bonus points for giving both a MongoDB console method and a MongoDB Ruby driver method. ...
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Mongodb Explain for Aggregation framework

...t, $geonear at the beginning of a pipeline) as well as subsequent $lookup and $graphLookup stages. Once data has been fetched into the aggregation pipeline for processing (e.g. passing through stages like $project, $unwind, and $group) further manipulation will be in-memory (possibly using temporar...
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Parse query string in JavaScript [duplicate]

... Here is a fast and easy way of parsing query strings in JavaScript: function getQueryVariable(variable) { var query = window.location.search.substring(1); var vars = query.split('&'); for (var i = 0; i < vars.length; i++...
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How do detect Android Tablets in general. Useragent?

...sing a Motorola Zoom to try our tablet site testing. The issue is that the Android Useragent is a general Useragent and there is no difference between tablet Android and mobile Android. I don't want to just target a specific device like the Xoom Useragent since Android will most likely be on multip...
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static allocation in java - heap, stack and permanent generation

I have been lately reading a lot on memory allocation schemes in java, and there have been many doubts as I have been reading from various sources. I have collected my concepts, and I would request to go through all of the points and comment on them. I came to know that memory allocation is JVM spec...
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Positioning element at center of screen

...creen irrespective of screen size. In other words, the space left on 'top' and 'bottom' should be equal and space left on 'right' and 'left' sides should be equal. I would like to accomplish this with only CSS. ...