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How to copy an object in Objective-C

...ed to deep copy a custom object that has objects of its own. I've been reading around and am a bit confused as to how to inherit NSCopying and how to use NSCopyObject. ...
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Image Greyscale with CSS & re-color on mouse-over?

I am looking to take an icon that is colored (and will be a link) and turn it greyscale until the user places their mouse over the icon (where it would then color the image). ...
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How can I make my flexbox layout take 100% vertical space?

How can I tell a flexbox layout row consume the remaining vertical space in a browser window? 3 Answers ...
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IntelliJ IDEA generating serialVersionUID

How do generate this value in IntelliJ IDEA? 12 Answers 12 ...
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How to efficiently compare two unordered lists (not sets) in Python?

...uld be considered equal, because they have exactly the same elements, only in different order. 10 Answers ...
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nodeValue vs innerHTML and textContent. How to choose?

I'm using plain js to alter the inner text of a label element, and I wasn't sure on what grounds I should use innerHTML or nodeValue or textContent. I don't need to create a new node or change the HTML elements or anything — just replace the text. Here's an example of the code: ...
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Add a column to a table, if it does not already exist

I want to write a query for MS SQL Server that adds a column into a table. But I don't want any error display, when I run/execute the following query. ...
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What is the size limit of a post request?

Sorry if this is duplicate,I would think it would be but couldn't find anything. 9 Answers ...
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How to pass values between Fragments

I am pretty new to using Fragments. 17 Answers 17 ...
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Behaviour of increment and decrement operators in Python

I notice that a pre-increment/decrement operator can be applied on a variable (like ++count ). It compiles, but it does not actually change the value of the variable! ...