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Why does Iterable not provide stream() and parallelStream() methods?
...make that impossible. So instead, we made it really easy to make a Stream from an Iterable, by providing a spliterator() method. The implementation of stream() in Collection is just:
default Stream<E> stream() {
return StreamSupport.stream(spliterator(), false);
}
Any client can get th...
Pretty Printing a pandas dataframe
... it is called tabulate.
It prints tabular data and works with DataFrame.
from tabulate import tabulate
import pandas as pd
df = pd.DataFrame({'col_two' : [0.0001, 1e-005 , 1e-006, 1e-007],
'column_3' : ['ABCD', 'ABCD', 'long string', 'ABCD']})
print(tabulate(df, headers='keys',...
When saving, how can you check if a field has changed?
...
I use following mixin:
from django.forms.models import model_to_dict
class ModelDiffMixin(object):
"""
A model mixin that tracks model fields' values and provide some useful api
to know what fields have been changed.
"""
def ...
What is Mocking?
... internal parts) or a plastic banana in front of it. You can save yourself from investing in 1000 real laptops and rotting bananas.
The point is you're not trying to test if the banana is fake or not. Nor testing if the laptop is fake or not. All you're doing is testing if your machine once it sees ...
How different is Objective-C from C++? [closed]
...t allow objects to be created on the stack - all objects must be allocated from the heap (either explicitly with an alloc message, or implicitly in an appropriate factory method).
Like C++, Objective-C has both structs and classes. However, where in C++ they are treated as almost exactly the same, i...
Why do Lua arrays(tables) start at 1 instead of 0?
...
Lua is descended from Sol, a language designed for petroleum engineers with no formal training in computer programming. People not trained in computing think it is damned weird to start counting at zero. By adopting 1-based array and string...
Split Python Flask app into multiple files
...y to do it. What you are trying to do can be achieved like this:
Main.py
from flask import Flask
from AccountAPI import account_api
app = Flask(__name__)
app.register_blueprint(account_api)
@app.route("/")
def hello():
return "Hello World!"
if __name__ == "__main__":
app.run()
Accoun...
How to create hyperlink to call phone number on mobile devices?
...l include them.
Since we never know where our website visitors are coming from, we need to make phone numbers callable from anywhere in the world. For this reason the + sign is always necessary. The + sign is automatically converted by your mobile carrier to your international dialing prefix, also ...
How to mock an import
...nditions I'd like to mock B in A (mock A.B ) and completely refrain from importing B .
8 Answers
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Fastest Way of Inserting in Entity Framework
...he context after SaveChanges and create a new one. This clears the context from all entites, SaveChanges doesn't do that, the entities are still attached to the context in state Unchanged. It is the growing size of attached entities in the context what slows down the insertion step by step. So, it i...