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How to extract a floating number from a string [duplicate]

I have a number of strings similar to Current Level: 13.4 db. and I would like to extract just the floating point number. I say floating and not decimal as it's sometimes whole. Can RegEx do this or is there a better way? ...
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What's “wrong” with C++ wchar_t and wstrings? What are some alternatives to wide characters?

...C++ community(particularly ##c++ on freenode) resent the use of wstrings and wchar_t , and their use in the windows api. What is exactly "wrong" with wchar_t and wstring , and if I want to support internationalization, what are some alternatives to wide characters? ...
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What is the difference between a WCF Service Application and a WCF Service Library?

I am developing a WCF web service and I used the WCF Service Application template to do that. 2 Answers ...
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What is Ember RunLoop and how does it work?

I am trying to understand how Ember RunLoop works and what makes it tick. I have looked at the documentation , but still have many questions about it. I am interested in understanding better how RunLoop works so I can choose appropriate method within its name space, when I have to defer execution o...
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Fast and Lean PDF Viewer for iPhone / iPad / iOS - tips and hints?

...ively the same approach except : I cache the generated image on the disk and always generate two to three images in advance in a separate thread. I don't overlay with a UIImage but instead draw the image in the layer when zooming is 1. Those tiles will be released automatically when memory warnin...
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To ternary or not to ternary? [closed]

...ve come across many programmers that are completely against ever using it, and some that use it too often. 54 Answers ...
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How to get number of entries in a Lua table?

...ind an answer. The Lua # operator only counts entries with integer keys, and so does table.getn : 8 Answers ...
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What are enums and why are they useful?

Today I was browsing through some questions on this site and I found a mention of an enum being used in singleton pattern about purported thread safety benefits to such solution. ...
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How is location accuracy measured in Android?

..., as the docs say, is not necessarily true), that means that this is one standard deviation. For example, if Location.getAccuracy returns 10, then there's a 68% chance the true location of the device is within 10 meters of the reported coordinates. http://developer.android.com/reference/android/loc...
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What is the exact difference between currentTarget property and target property in javascript

Can anyone please tell me the exact difference between currentTarget and target property in Javascript events with example and which property is used in which scenario? ...