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What does “Object reference not set to an instance of an object” mean? [duplicate]
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This is a very common error and can occur because of all kinds of reasons. The root cause really depends on the specific scenario that you've encountered.
If you are using an API or invoking methods that may return null then it's important to handle this gracefully. The main metho...
TSQL Pivot without aggregate function
I have a table like this...
9 Answers
9
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Avoid Android Lint complains about not-translated string
...-strings.xml file within values directory.. Running Android Lint to check for problems it keeps saying that some translations are missing.. I do not want to disable this check on the whole project, I'd like to disable it only in some XML files.. is it possible?
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What is the difference between atan and atan2 in C++?
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nbro
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answered Nov 12 '08 at 9:22
Chris Jester-Youn...
Is there a way to instantiate a class by name in Java?
I was looking as the question : Instantiate a class from its string name which describes how to instantiate a class when having its name. Is there a way to do it in Java? I will have the package name and class name and I need to be able to create an object having that particular name.
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How do I get the function name inside a function in PHP?
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totymedli
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answered Jun 17 '09 at 10:33
SilfverstromSi...
How do I create delegates in Objective-C?
I know how delegates work, and I know how I can use them.
19 Answers
19
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How to set selected item of Spinner by value, not by position?
... edited Jan 4 '18 at 12:43
Kunwar Ajeet Singh Rajput
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answered Nov 19 '10 at 18:18
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How to run `rails generate scaffold` when the model already exists?
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scaffold_controller
session_migration
stylesheets
If you'd like to generate a controller scaffold for your model, see scaffold_controller. Just for clarity, here's the description on that:
Stubs out a scaffolded controller and its views. Pass the model name,
either CamelCased...
Android: how to check if a View inside of ScrollView is visible?
I have a ScrollView which holds a series of Views . I would like to be able to determine if a view is currently visible (if any part of it is currently displayed by the ScrollView ). I would expect the below code to do this, surprisingly it does not:
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