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Java List.add() UnsupportedOperationException
I try to add objects to a List<String> instance but it throws an UnsupportedOperationException .
Does anyone know why?
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ValueError: invalid literal for int() with base 10: ''
... am creating a program that reads a file and if the first line of the file is not blank, it reads the next four lines. Calculations are performed on those lines and then the next line is read. If that line is not empty it continues. However, I am getting this error:
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IllegalStateException: Can not perform this action after onSaveInstanceState with ViewPager
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Don't make the call to super() on the saveInstanceState method. This was messing things up...
This is a known bug in the support package.
If you need to save the instance and add something to your outState Bundle you can use the following:
@Override
protected void onSaveInstanceState(Bu...
how does multiplication differ for NumPy Matrix vs Array classes?
...rix multiplication, you need to use the function matrixmultipy(). I feel this makes the code very unreadable.
8 Answers
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What is the difference between an int and a long in C++?
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It is implementation dependent.
For example, under Windows they are the same, but for example on Alpha systems a long was 64 bits whereas an int was 32 bits. This article covers the rules for the Intel C++ compiler on variab...
How to set the part of the text view is clickable
I have the text " Android is a Software stack ". In this text i want to set the " stack " text is clickable. in the sense if you click on that it will redirected to a new activity(not in the browser).
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Proper Repository Pattern Design in PHP?
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I thought I'd take a crack at answering my own question. What follows is just one way of solving the issues 1-3 in my original question.
Disclaimer: I may not always use the right terms when describing patterns or techniques. Sorry for that.
The Goals:
Create a complete example of a basic c...
How to check size of a file using Bash?
...re must be an easier way to check for file sizes instead. I.e. file.txt is normally 100k; how to make a script check if it is less than 90k (including 0), and make it do wget a new copy because the file is corrupt in this case.
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Casting to string in JavaScript
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They do behave differently when the value is null.
null.toString() throws an error - Cannot call method 'toString' of null
String(null) returns - "null"
null + "" also returns - "null"
Very similar behaviour happens if value is undefined (see jbabey's answer).
O...
Difference between using bean id and name in Spring configuration file
Is there any difference between using an id attribute and name attribute on a <bean> element in a Spring configuration file?
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