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Importing data from a JSON file into R
Is there a way to import data from a JSON file into R? More specifically, the file is an array of JSON objects with string fields, objects, and arrays. The RJSON Package isn't very clear on how to deal with this http://cran.r-project.org/web/packages/rjson/rjson.pdf .
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How to import a module given the full path?
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For Python 3.5+ use:
import importlib.util
spec = importlib.util.spec_from_file_location("module.name", "/path/to/file.py")
foo = importlib.util.module_from_spec(spec)
spec.loader.exec_module(foo)
foo.MyClass()
For Python 3.3 and 3.4 use:
from importlib.machinery import SourceFileLoader
foo...
Jackson how to transform JsonNode to ArrayNode without casting?
I am changing my JSON library from org.json to Jackson and I want to migrate the following code:
4 Answers
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What is the purpose of the “final” keyword in C++11 for functions?
...rn already mentioned in a comment is that if you are overriding a function from a base class, then you cannot possibly mark it as non-virtual:
struct base {
virtual void f();
};
struct derived : base {
void f() final; // virtual as it overrides base::f
};
struct mostderived : derived {
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What is the easiest way to push an element to the beginning of the array?
... between shift and unshift as to which adds to the array and which removes from the array, drop an 'f' from the names mentally and you get an all-too-clear picture as to the direction. (And then you have to remember that these methods don't work on the "end" of the array. ;)
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How to get the first item from an associative PHP array?
...) will return the first element, but it will also remove the first element from the array.
$first = array_shift($array);
current() will return the value of the array that its internal memory pointer is pointing to, which is the first element by default.
$first = current($array);
If you want to...
Rails update_attributes without save?
...Your example is a little bit misleading since you haven't pasted this line from the model: attr_accessible :is_admin, :as => :admin ;)
– Robin
Sep 5 '12 at 16:12
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What are some compelling use cases for dependent method types?
...it) was inspired by the programming language Beta ... they arise naturally from Beta's consistent nesting semantics. I don't know of any other even faintly mainstream programming language which has dependent types in this form. Languages like Coq, Cayenne, Epigram and Agda have a different form of d...
what's the difference between “hadoop fs” shell commands and “hdfs dfs” shell commands?
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From what I can tell, there is no difference between hdfs dfs and hadoop fs. They're simply different naming conventions based on which version of Hadoop you're using. For example, the notes in 1.2.1 use hdfs dfs while 0.19 u...
Where does Scala look for implicits?
...rds for it. :-) For example, where do the values for integral below come from?
2 Answers
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