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How does the String class override the + operator?
...x = "+x;
The compiler converts "x = "+x; into a StringBuilder internally and uses .append(int) to "add" the integer to the string.
5.1.11. String Conversion
Any type may be converted to type String by string conversion.
A value x of primitive type T is first converted to a reference val...
Recursively counting files in a Linux directory
...IR_NAME -type f | wc -l
Explanation:
-type f to include only files.
| (and not ¦) redirects find command's standard output to wc command's standard input.
wc (short for word count) counts newlines, words and bytes on its input (docs).
-l to count just newlines.
Notes:
Replace DIR_NAME with...
python pandas: apply a function with arguments to a series
I want to apply a function with arguments to a series in python pandas:
4 Answers
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How do shift operators work in Java? [duplicate]
I am trying to understand the shift operators and couldn't get much.
When I tried to execute the below code
9 Answers
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C++11 rvalues and move semantics confusion (return statement)
I'm trying to understand rvalue references and move semantics of C++11.
6 Answers
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How do I test a private function or a class that has private methods, fields or inner classes?
..., z);
foo.privateField = value;
This way your code remains type-safe and readable. No design compromises, no overexposing methods and fields for the sake of tests.
If you have somewhat of a legacy Java application, and you're not allowed to change the visibility of your methods, the best wa...
What are advantages of Artificial Neural Networks over Support Vector Machines? [closed]
ANN (Artificial Neural Networks) and SVM (Support Vector Machines) are two popular strategies for supervised machine learning and classification. It's not often clear which method is better for a particular project, and I'm certain the answer is always "it depends." Often, a combination of both alon...
The transaction log for the database is full
...arily require lots of space for the log file, I created a second log file and made it huge. Once the project is complete we then removed the extra log file.
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Custom views with Storyboard
...s (I call them widgets). These widgets consist basically of a MyWidget.h and a MyWidget.m file as well as a MyWidget.xib file, where the root element is a UIView and the MyWidget class is the File Owner of the UIView. In the init of this widget I do a loadNibNamed .
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What is the difference between a map and a dictionary?
... values. Isn't a dictionary the same? What is the difference between a map and a dictionary 1 ?
11 Answers
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