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Local variables in nested functions

Okay, bear with me on this, I know it's going to look horribly convoluted, but please help me understand what's happening. ...
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Composer: how can I install another dependency without updating old ones?

I have a project with a few dependencies and I'd like to install another one, but I'd like to keep the others the way they are. So I've edited the composer.json , but if I run composer install , I get the following output: ...
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Partly JSON unmarshal into a map in Go

My websocket server will receive and unmarshal JSON data. This data will always be wrapped in an object with key/value pairs. The key-string will act as value identifier, telling the Go server what kind of value it is. By knowing what type of value, I can then proceed to JSON unmarshal the value int...
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What is the difference between synchronous and asynchronous programming (in node.js)

I've been reading nodebeginner And I came across the following two pieces of code. 10 Answers ...
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How to delete history of last 10 commands in shell?

Commands follows 18 Answers 18 ...
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How to select/get drop down option in Selenium 2

I am converting my selenium 1 code to selenium 2 and can't find any easy way to select a label in a drop down menu or get the selected value of a drop down. Do you know how to do that in Selenium 2? ...
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android asynctask sending callbacks to ui [duplicate]

I have the following asynctask class which is not inside the activity. In the activity I'm initializing the asynctask, and I want the asynctask to report callbacks back to my activity. Is it possible? Or does the asynctask must be in the same class file as the activity? ...
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Specifying column name in a “references” migration

I want to make a migration in Rails, referencing another table. Usually, I would do something like: 6 Answers ...
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How do I get the current version of my iOS project in code?

I would like to be able to get the current version of my iOS project/app as an NSString object without having to define a constant in a file somewhere. I don't want to change my version value in 2 places. ...
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What's the difference between using CGFloat and float?

I tend to use CGFloat all over the place, but I wonder if I get a senseless "performance hit" with this. CGFloat seems to be something "heavier" than float, right? At which points should I use CGFloat, and what makes really the difference? ...