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Check if an apt-get package is installed and then install it if it's not on Linux
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edited Aug 19 '09 at 6:39
answered Aug 19 '09 at 6:27
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Mocking member variables of a class using Mockito
I am a newbie to development and to unit tests in particular .
I guess my requirement is pretty simple, but I am keen to know others thoughts on this.
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Why can I change value of a constant in javascript
...o an array or object you're not re-assigning or re-declaring the constant, it's already declared and assigned, you're just adding to the "list" that the constant points to.
So this works fine:
const x = {};
x.foo = 'bar';
console.log(x); // {foo : 'bar'}
x.foo = 'bar2';
console.log(x); // {f...
What is the real overhead of try/catch in C#?
...ntrolling process flow, but where does this overhead come from and what is it's actual impact?
12 Answers
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Does Python have “private” variables in classes?
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It's cultural. In Python, you don't write to other classes' instance or class variables. In Java, nothing prevents you from doing the same if you really want to - after all, you can always edit the source of the class itsel...
Advantages to Using Private Static Methods
...age on this:
After you mark the methods as static, the compiler will emit non-virtual call sites to these members. Emitting non-virtual call sites will prevent a check at runtime for each call that ensures that the current object pointer is non-null. This can result in a measurable performance g...
How to extract text from a PDF? [closed]
...d in pre-known regions of the document, so the API will need to give us positional information of each element on the page.
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Static nested class in Java, why?
I was looking at the Java code for LinkedList and noticed that it made use of a static nested class, Entry .
14 Answers
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What does auto&& tell us?
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By using auto&& var = <initializer> you are saying: I will accept any initializer regardless of whether it is an lvalue or rvalue expression and I will preserve its constness. This is typically used for forwarding (usually with T&&). The r...
How do I declare a 2d array in C++ using new?
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A dynamic 2D array is basically an array of pointers to arrays. You can initialize it using a loop, like this:
int** a = new int*[rowCount];
for(int i = 0; i < rowCount; ++i)
a[i] = new int[colCount];
The above, for colCount= 5 and rowCount = 4, would produce the following:
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