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How to conditionally push an item in an observable array?

I would like to push a new item onto an observableArray , but only if the item is not already present. Is there any "find" function or recommended pattern for achieving this in KnockoutJS? ...
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Difference between Label and TextBlock

According to the Windows Applications Development with Microsoft .NET 4 70-511 Training Kit 5 Answers ...
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How to make an app's background image repeat

I have set a background image in my app, but the background image is small and I want it to be repeated and fill in the whole screen. What should I do? ...
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How to scroll to the bottom of a UITableView on the iPhone before the view appears

I have a UITableView that is populated with cells of a variable height. I would like the table to scroll to the bottom when the view is pushed into view. ...
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Order data frame rows according to vector with specific order

Is there an easier way to ensure that a data frame's rows are ordered according to a "target" vector as the one I implemented in the short example below? ...
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Loop through Map in Groovy?

I have a very simple task I am trying to do in Groovy but cannot seem to get it to work. I am just trying to loop through a map object in groovy and print out the key and value but this code does not work. ...
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What is the correct way to get a subarray in Scala?

I am trying to get a subarray in scala, and I am a little confused on what the proper way of doing it is. What I would like the most would be something like how you can do it in python: ...
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How to reverse a singly linked list using only two pointers?

I wonder if there exists some logic to reverse a singly-linked list using only two pointers. 33 Answers ...
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Why doesn't Haskell's Prelude.read return a Maybe?

Is there a good reason why the type of Prelude.read is 5 Answers 5 ...
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Calendar.getInstance(TimeZone.getTimeZone(“UTC”)) is not returning UTC time

I am really confused with the result I am getting with Calendar.getInstance(TimeZone.getTimeZone("UTC")) method call, it's returning IST time. ...