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How to write iOS app purely in C

I read here Learn C Before Objective-C? 4 Answers 4 ...
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How do lexical closures work?

While I was investigating a problem I had with lexical closures in Javascript code, I came along this problem in Python: 9 ...
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How to debug stream().map(…) with lambda expressions?

In our project we are migrating to java 8 and we are testing the new features of it. 6 Answers ...
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C# elegant way to check if a property's property is null

In C#, say that you want to pull a value off of PropertyC in this example and ObjectA, PropertyA and PropertyB can all be null. ...
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How do I integrate Ajax with Django applications?

I am new to Django and pretty new to Ajax. I am working on a project where I need to integrate the two. I believe that I understand the principles behind them both, but have not found a good explanation of the two together. ...
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What is the most accurate way to retrieve a user's correct IP address in PHP?

I know there are a plethora of $_SERVER variables headers available for IP address retrieval. I was wondering if there is a general consensus as to how to most accurately retrieve a user's real IP address (well knowing no method is perfect) using said variables? ...
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Visual Studio Solutions Folder as real Folders

I have a Visual Studio Solution. Currently, it is an empty solution (=no projects) and I have added a few solution folders. ...
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What did MongoDB not being ACID compliant before v4 really mean?

I am not a database expert and have no formal computer science background, so bear with me. I want to know the kinds of real world negative things that can happen if you use an old MongoDB version prior to v4 , which were not ACID compliant. This applies to any ACID noncompliant database. ...
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Adding a new SQL column with a default value

I am looking for the syntax to add a column to a MySQL database with a default value of 0 10 Answers ...
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Constructor of an abstract class in C#

Why is it possible to write constructor for an abstract class in C#? As far as I know we can't instantiate an abstract class.. so what is it for? You can't instantiate the class, right? ...