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What is the difference between Collections.emptyList() and Collections.EMPTY_LIST
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Collections.EMPTY_LIST returns an old-style List
Collections.emptyList() uses type-inference and therefore returns
List<T>
Collections.emptyList() was added in Java 1.5 and it is probably always preferable. This way, you don't need to unnecess...
What is the use of the pipe symbol in YAML?
I am new to yaml, and I have a question about the pipe symbol (|) used for multiple lines. Does YAML have any syntax like the one below?
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How to deal with “data of class uneval” error from ggplot2?
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when you add a new data set to a geom you need to use the data= argument. Or put the arguments in the proper order mapping=..., data=.... Take a look at the arguments for ?geom_line.
Thus:
p + geom_line(data=df.last, aes(HrEnd, M...
curl_exec() always returns false
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Error checking and handling is the programmer's friend. Check the return values of the initializing and executing cURL functions. curl_error() and curl_errno() will contain further information in case of failure:
try {
$ch = curl_init();
// Check if initialization had gone wrong* ...
Printing newlines with print() in R
I am trying to print a multiline message in R. For example,
4 Answers
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Visual studio long compilation when replacing int with double
My copy of VS2013 Ultimate compiles this code for 60+ seconds:
2 Answers
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How to get the path of current worksheet in VBA?
I wrote a macro as an add-in, and I need to get the path of the current worksheet on which it is being executed. How do I do this? How do I get the file path (just the directory)?
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Which characters are illegal within a branch name?
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Naming rules for refname:
Git imposes the following rules on how references are named:
They can include slash / for hierarchical (directory) grouping, but no slash-separated component can begin with a dot . or end with the sequence...
Node JS Error: ENOENT
... correct path – this path starts with / which is the root directory.
In unix, the shortcut to the current directory is .
Try this "./tmp/test.jpg"
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What is the standard exception to throw in Java for not supported/implemented operations?
In particular, is there a standard Exception subclass used in these circumstances?
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