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What is @RenderSection in asp.net MVC
...
If you have a _Layout.cshtml view like this
<html>
<body>
@RenderBody()
@RenderSection("scripts", required: false)
</body>
</html>
then you can have an index.cshtml content view like this
...
Preserving order with LINQ
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so because OrderBy is a stable sort, then: seq.OrderBy( _ => _.Key ) will put the elements in to exactly the same order as seq.GroupBy( _ => _.Key ).SelectMany( _ => _ ). Is that correct?
– dmg
Feb 1 '16 at 22:11
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What is :: (double colon) in Python when subscripting sequences?
...n custom classes to make it do whatever you want
class C(object):
def __getitem__(self, k):
return k
# Single argument is passed directly.
assert C()[0] == 0
# Multiple indices generate a tuple.
assert C()[0, 1] == (0, 1)
# Slice notation generates a slice object.
assert C()[1:2:3] =...
Accessing private member variables from prototype-defined functions
...ns they're going to be public. So we just stick to naming conventions for _private fields.
Don't bother mixing Closures with Prototypes
I think you shouldn't mix closure variables with prototype methods. You should use one or the other.
When you use a closure to access a private variable, pro...
Is it better in C++ to pass by value or pass by constant reference?
...r iterators and for function objects (lambdas, classes deriving from std::*_function).
This was especially true before the existence of move semantics. The reason is simple: if you passed by value, a copy of the object had to be made and, except for very small objects, this is always more expensive...
Get names of all keys in the collection
...You could do this with MapReduce:
mr = db.runCommand({
"mapreduce" : "my_collection",
"map" : function() {
for (var key in this) { emit(key, null); }
},
"reduce" : function(key, stuff) { return null; },
"out": "my_collection" + "_keys"
})
Then run distinct on the resulting collecti...
GitHub pages are not updating
...
you can tell jekyll to show "future" posts by adding future: true to your _config.yml
and/or add timezone: TIMEZONE to specify your timezone.
See https://jekyllrb.com/docs/configuration/ for more info.
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What is the difference between varchar and varchar2 in Oracle?
...aracters with a maximum length of 4000 bytes. If the init.ora parameter max_string_size is default, the maximum length of a VARCHAR2 can be 4000 bytes. If the init.ora parameter max_string_size = extended, the maximum length of a VARCHAR2 can be 32767 bytes
The VARCHAR data type stores character st...
Getting the SQL from a Django QuerySet [duplicate]
...et = MyModel.objects.all()
>>> print(queryset.query)
SELECT "myapp_mymodel"."id", ... FROM "myapp_mymodel"
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JSON serialization of Google App Engine models
...nary that can be passed to simplejson:
import datetime
import time
SIMPLE_TYPES = (int, long, float, bool, dict, basestring, list)
def to_dict(model):
output = {}
for key, prop in model.properties().iteritems():
value = getattr(model, key)
if value is None or isinstance(...