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What is the difference between 'log' and 'symlog'?

... I finally found some time to do some experiments in order to understand the difference between them. Here's what I discovered: log only allows positive values, and lets you choose how to handle negative ones (mask or clip). symlog means symmetrical log, and allows positive and negative valu...
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ViewDidAppear is not called when opening app from background

I have a View Controller in which my value is 0 (label) and when I open that View Controller from another ViewController I have set viewDidAppear to set value 20 on label. It works fine but when I close my app and than again I open my app but the value doesn't change because viewDidLoad , vie...
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.net localhost website consistently making get arterySignalR/poll?transport=longPolling&connectionTo

I created a new VS 2013 project and viewed the default.aspx page with the Firefox browser. When I check the net calls it has made, I see it making constant calls to: ...
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Correct way to find max in an Array in Swift

... Note in Swift 3 these have been renamed to simply min() and max(). – jemmons Jul 10 '16 at 14:55 ...
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In git, is there a simple way of introducing an unrelated branch to a repository?

...han branch, named <new_branch>, started from <start_point> and switch to it. The first commit made on this new branch will have no parents and it will be the root of a new history totally disconnected from all the other branches and commits. This doesn't do exactly what t...
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Why use double indirection? or Why use pointers to pointers?

... Yes, and if you ever lose track of one of your pointers, here's a pointer: pointerpointer.com – Andrew Cheong Aug 21 at 0:50 ...
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Pandas convert dataframe to array of tuples

I have manipulated some data using pandas and now I want to carry out a batch save back to the database. This requires me to convert the dataframe into an array of tuples, with each tuple corresponding to a "row" of the dataframe. ...
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Passing a method as a parameter in Ruby

...ult argument in a block declaration like that. So you need to use a splat and setup the default in the proc code itself. Or, depending on your scope of all this, it may be easier to pass in a method name instead. def weightedknn(data, vec1, k = 5, weightf = :gaussian) ... weight = self.send...
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.NET Configuration (app.config/web.config/settings.settings)

... have a .NET application which has different configuration files for Debug and Release builds. E.g. the debug app.config file points to a development SQL Server which has debugging enabled and the release target points to the live SQL Server. There are also other settings, some of which are differ...
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Bordered UITextView

... I didn't think it really needed much explaining, view is the UITextView, and the code goes wherever you'd set up the view (awakeFromNib or viewDidLoad are two possible places). Since there was no code given there's no way to give good context in response. – Kendall Helmstett...