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onTouchListener warning: onTouch should call View#performClick when a click is detected
I have created a onTouchListener . Unfortunately onTouch() method throws me a warning:
5 Answers
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LINQ: “contains” and a Lambda query
I have a List<BuildingStatus> called buildingStatus . I'd like to check whether it contains a status whose char code (returned by GetCharCode() ) equals some variable, v.Status .
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C++ convert vector to vector
...lean way to convert a std::vector<int> intVec to std::vector<double> doubleVec . Or, more generally, to convert two vectors of convertible types?
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How to sort with a lambda?
I'd like to use a lambda function to sort custom classes in place of binding an instance method. However, the code above yields the error:
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How do I reverse a C++ vector?
Is there a built-in vector function in C++ to reverse a vector in place?
6 Answers
6
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How to invert a grep expression
The following grep expression successfully lists all the .exe and .html files in the current directory and sub directories.
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Sprintf equivalent in Java
Printf got added to Java with the 1.5 release but I can't seem to find how to send the output to a string rather than a file (which is what sprintf does in C). Does anyone know how to do this?
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How to use a custom comparison function in Python 3?
In Python 2.x , I could pass custom function to sorted and .sort functions
6 Answers
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Instance v state variables in react.js
In react.js, is it better to store a timeout reference as an instance variable (this.timeout) or a state variable (this.state.timeout)?
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Sort rows in data.table in decreasing order on string key `order(-x,v)` gives error on data.table 1.
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Update
data.table v1.9.6+ now supports OP's original attempt and the following answer is no longer necessary.
You can use DT[order(-rank(x), y)].
x y v
1: c 1 7
2: c 3 8
3: c 6 9
4: b 1 1
5: b 3 2
6: b 6 3
7: a 1 4
8: a 3...