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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* ...
SqlAlchemy - Filtering by Relationship Attribute
I don't have much experience with SQLAlchemy and I have a problem, which I can't solve. I tried searching and I tried a lot of code.
This is my Class (reduced to the most significant code):
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PostgreSQL delete with inner join
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DELETE
FROM m_productprice B
USING m_product C
WHERE B.m_product_id = C.m_product_id AND
C.upc = '7094' AND
B.m_pricelist_version_id='1000020';
or
DELETE
FROM m_productprice
WHERE m_pricelist_version_id...
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...
Printing newlines with print() in R
I am trying to print a multiline message in R. For example,
4 Answers
4
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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
2
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How to put comments in Django templates
I would like to comment this with a line
6 Answers
6
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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?
4 Answers
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