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Non-static variable cannot be referenced from a static context
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You must understand the difference between a class and an instance of that class. If you see a car on the street, you know immediately that it's a car even if you can't see which model or type. This is because you compare what you see with t...
What is the difference between Forking and Cloning on GitHub?
I'd like to know the differences between doing a Fork of a project and doing a clone of it.
9 Answers
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Debug.Assert vs Exception Throwing
I've read plenty of articles (and a couple of other similar questions that were posted on StackOverflow) about how and when to use assertions, and I understood them well. But still, I don't understand what kind of motivation should drive me to use Debug.Assert instead of throwing a plain excep...
What is the combinatory logic equivalent of intuitionistic type theory?
I recently completed a university course which featured Haskell and Agda (a dependent typed functional programming language), and was wondering if it was possible to replace lambda calculus in these with combinatory logic. With Haskell this seems possible using the S and K combinators, thus making i...
MySQL “Group By” and “Order By”
I want to be able to select a bunch of rows from a table of e-mails and group them by the from sender. My query looks like this:
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NULL values inside NOT IN clause
...t I thought were identical queries one using a not in where constraint and the other a left join . The table in the not in constraint had one null value (bad data) which caused that query to return a count of 0 records. I sort of understand why but I could use some help fully grasping the con...
Android. WebView and loadData
... "text/html; charset=UTF-8", null);
This works flawlessly, especially on Android 4.0, which apparently ignores character encoding inside HTML.
Tested on 2.3 and 4.0.3.
In fact, I have no idea about what other values besides "base64" does the last parameter take. Some Google examples put null in ...
Java: getMinutes and getHours
How do you get Hours and Minutes since Date.getHours and Date.getMinutes got deprecated? The examples that I found on Google search used the deprecated methods.
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What is the difference between HTML tags and ?
...uld like to ask for some simple examples showing the uses of <div> and <span> . I've seen them both used to mark a section of a page with an id or class , but I'm interested in knowing if there are times when one is preferred over the other.
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How do I animate constraint changes?
I'm updating an old app with an AdBannerView and when there is no ad, it slides off screen. When there is an ad it slides on the screen. Basic stuff.
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