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Parse large JSON file in Nodejs
... values with double quotes. In other words, {name:'thing1'} will throw an error; you must use {"name":"thing1"}.
Because no more than a chunk of data will ever be in memory at a time, this will be extremely memory efficient. It will also be extremely fast. A quick test showed I processed 10,000 ...
Difference between a theta join, equijoin and natural join
... whereas it makes nonsense and more is against business logic and leads to error. So yes, "natural join" is dangerous. It forces you to have distinct names except for (primary/foreign) key colulmns and lose "name spacing".
– LoganMzz
Nov 8 '16 at 13:31
...
Return all enumerables with yield return at once; without looping through
I have the following function to get validation errors for a card. My question relates to dealing with GetErrors. Both methods have the same return type IEnumerable<ErrorInfo> .
...
When to use EntityManager.find() vs EntityManager.getReference() with JPA
... EntityManager.find() method?
EntityManager.getReference() is really an error prone method and there is really very few cases where a client code needs to use it.
Personally, I never needed to use it.
EntityManager.getReference() and EntityManager.find() : no difference in terms of overhead
...
Are there strongly-typed collections in Objective-C?
...ion of type 'NSString *'
And in Swift code, they will produce a compiler error:
var str: String = arr[0]
var num: Int = arr[0] //Error 'String' is not convertible to 'Int'
Lightweight Generics are intended to be used with NSArray, NSDictionary and NSSet, but you can also add them to your own cl...
What's the difference between Ruby's dup and clone methods?
...does not.
o = Object.new
def o.foo
42
end
o.dup.foo # raises NoMethodError
o.clone.foo # returns 42
Second, clone preserves the frozen state, while dup does not.
class Foo
attr_accessor :bar
end
o = Foo.new
o.freeze
o.dup.bar = 10 # succeeds
o.clone.bar = 10 # raises RuntimeError
The...
How does an underscore in front of a variable in a cocoa objective-c class work?
...le use to differentiate member variables from local variables.
As for the error, it sounds like aMission has the wrong type. What it its declaration?
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Foreign keys in mongo?
...ones"})
> db.foo.find()
{ "_id" : ObjectId("4df6539ae90592692ccc9940"), "group" : "phones" }
{ "_id" : ObjectId("4df6540fe90592692ccc9941"), "group" : "phones" }
>db.foo.find({'_id':ObjectId("4df6539ae90592692ccc9940")})
{ "_id" : ObjectId("4df6539ae90592692ccc9940"), "group...
How do I convert from int to String?
...omes "5").
– SimonJ
Nov 5 '10 at 14:05
5
...
How to JSON serialize sets?
...(set([1,2,3,4,5,Something()]), cls=SetEncoder)
This raises the following error:
TypeError: <__main__.Something object at 0x1691c50> is not JSON serializable
This indicates that the encoder will take the list result returned and recursively call the serializer on its children. To add a cus...