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How to print the contents of RDD?
...o view the content of a RDD, one way is to use collect():
myRDD.collect().foreach(println)
That's not a good idea, though, when the RDD has billions of lines. Use take() to take just a few to print out:
myRDD.take(n).foreach(println)
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What are naming conventions for MongoDB?
Is there a set of preferred naming conventions for MongoDB entitites such as databases, collections, field names?
6 Answers...
What’s the best way to check if a file exists in C++? (cross platform)
I have read the answers for What's the best way to check if a file exists in C? (cross platform) , but I'm wondering if there is a better way to do this using standard c++ libs? Preferably without trying to open the file at all.
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Is Python strongly typed?
...have a type, as opposed to static typing where variables have a type.
As for your example
bob = 1
bob = "bob"
This works because the variable does not have a type; it can name any object. After bob=1, you'll find that type(bob) returns int, but after bob="bob", it returns str. (Note that type i...
PHP Fatal error: Cannot redeclare class
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It means you've already created a class.
For instance:
class Foo {}
// some code here
class Foo {}
That second Foo would throw the error.
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How do I read from parameters.yml in a controller in symfony2?
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The URL for documentation is now symfony.com/doc/2.7/components/dependency_injection/…
– SilvioQ
Jun 9 '15 at 18:45
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How do I change the string representation of a Python class? [duplicate]
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The closest equivalent to Java's toString is to implement __str__ for your class. Put this in your class definition:
def __str__(self):
return "foo"
You may also want to implement __repr__ to aid in debugging.
See here for more information:
Special Method Names - Basic Customizat...
Can I extend a class using more than 1 class in PHP?
...ve several classes with functions that I need but want to store separately for organisation, can I extend a class to have both?
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How do I use raw_input in Python 3
...'t get the raw_input to "freeze" the dos pop-up. The book I'm reading is for Python 2.5 and I'm using Python 3.1
8 Answer...
Example for boost shared_mutex (multiple reads/one write)?
...nly lock them out when an update is needed (the updating thread could wait for the other threads to finish).
6 Answers
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