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Dynamically change color to lighter or darker by percentage CSS (Javascript)

We have a big application on the site and we have a few links which are, let's say blue color like the blue links on this site. Now I want to make some other links, but with lighter color. Obviously I can just do simply by the hex code adding in the CSS file, but our site lets user decide what color...
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Checking if a folder exists (and creating folders) in Qt, C++

In Qt, how do I check if a given folder exists in the current directory? If it doesn't exist, how do I then create an empty folder? ...
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'App not Installed' Error on Android

I have a program working in the Android Emulator. Every now and again I have been creating a signed .apk and exporting it to my HTC Desire to test. It has all been fine. ...
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Instance attribute attribute_name defined outside __init__

I split up my class constructor by letting it call multiple functions, like this: 6 Answers ...
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Why does instanceof return false for some literals?

... Primitives are a different kind of type than objects created from within Javascript. From the Mozilla API docs: var color1 = new String("green"); color1 instanceof String; // returns true var color2 = "coral"; color2 instanceof String; // returns false...
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Why doesn't a python dict.update() return the object?

I 'm trying to do : 10 Answers 10 ...
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How to get first N elements of a list in C#?

I would like to use Linq to query a bus schedule in my project, so that at any time I can get the next 5 bus arrival times. How can I limit my query to the first 5 results? ...
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How to listen for changes to a MongoDB collection?

I'm creating a sort of background job queue system with MongoDB as the data store. How can I "listen" for inserts to a MongoDB collection before spawning workers to process the job? Do I need to poll every few seconds to see if there are any changes from last time, or is there a way my script can wa...
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Is there a way to list pip dependencies/requirements?

Without going through with the installation, I want to quickly see all the packages that pip install would install. 7 Ans...
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Embedding unmanaged dll into a managed C# dll

I have a managed C# dll that uses an unmanaged C++ dll using DLLImport. All is working great. However, I want to embed that unmanaged DLL inside my managed DLL as explain by Microsoft there: ...