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How does python numpy.where() work?
...
There can also be overhead in some cases using the __getitem__ syntax of [] over either numpy.where or numpy.take. Since __getitem__ has to also support slicing, there's some overhead. I've seen noticeable speed differences when working with the Python Pandas data structures and l...
Check if two linked lists merge. If so, where?
...onally quick (iterates each list once) but uses a lot of memory:
for each item in list a
push pointer to item onto stack_a
for each item in list b
push pointer to item onto stack_b
while (stack_a top == stack_b top) // where top is the item to be popped next
pop stack_a
pop stack_b
// va...
How to print a dictionary line by line in Python?
...
def dumpclean(obj):
if isinstance(obj, dict):
for k, v in obj.items():
if hasattr(v, '__iter__'):
print k
dumpclean(v)
else:
print '%s : %s' % (k, v)
elif isinstance(obj, list):
for v in obj:
...
C# Entity-Framework: How can I combine a .Find and .Include on a Model Object?
...e Include() first, then retrieve a single object from the resulting query:
Item item = db.Items
.Include(i => i.Category)
.Include(i => i.Brand)
.FistOrDefault(x => x.ItemId == id);
...
Fully custom validation error message with Rails
...n't display the attribute name in the message.
A model defined as:
class Item < ApplicationRecord
validates :name, presence: true
end
with the following en.yml:
en:
activerecord:
errors:
models:
item:
attributes:
name:
blank: "^You ca...
MenuItemCompat.getActionView always returns null
I just implemented the v7 AppCompat support library but the MenuItemCompat.getActionView always return null in every Android version I tested (4.2.2, 2.3.4 ....)
...
Naming convention - underscore in C++ and C# variables
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It is best practice to NOT use UNDERSCORES before any variable name or parameter name in C++
Names beginning with an underscore or a double underscore are RESERVED for the C++ implementers. Names with an underscore are reserved fo...
Background ListView becomes black when scrolling
... convertView = inflater1.inflate(R.layout.listview_draftreport_item, null);
}
}
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Android Split string
... by comma
String data = "1,Diego Maradona,Footballer,Argentina";
String[] items = data.split(",");
for (String item : items)
{
System.out.println("item = " + item);
}
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Is there any standard for JSON API response format?
Do standards or best practices exist for structuring JSON responses from an API? Obviously, every application's data is different, so that much I'm not concerned with, but rather the "response boilerplate", if you will. An example of what I mean:
...