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How to reset a single table in rails?
...index/primary key in SQLite just type:
$ rails console
> ActiveRecord::Base.connection.execute("DELETE from sqlite_sequence where name = 'yourtablename'")
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correct way to use super (argument passing)
...pairs off of **kwargs or remove them from *args. Instead, you can define a Base class which unlike object, absorbs/ignores arguments:
class Base(object):
def __init__(self, *args, **kwargs): pass
class A(Base):
def __init__(self, *args, **kwargs):
print "A"
super(A, self)._...
Set Locale programmatically
...ocale change in higher API versions. If so, add the following code to your Base Activity so that you update the context locale on every Activity creation:
@Override
protected void attachBaseContext(Context base) {
super.attachBaseContext(updateBaseContextLocale(base));
}
private Context updat...
Should you ever use protected member variables?
...
@Jake: You should never make design decisions based on performance assumptions. You make design decisions based upon what you think is the best design and only if you real life profiling shows a bottleneck in your design, you go and fix it. Usually if the design is sound...
C++ Dynamic Shared Library on Linux
... class_user
If this were for a plugin system, you would use MyClass as a base class and define all the required functions virtual. The plugin author would then derive from MyClass, override the virtuals and implement create_object and destroy_object. Your main application would not need to be chan...
What is difference between CrudRepository and JpaRepository interfaces in Spring Data JPA?
...d you want to use one over the other?" part of your question.
Basics
The base interface you choose for your repository has two main purposes. First, you allow the Spring Data repository infrastructure to find your interface and trigger the proxy creation so that you inject instances of the interfa...
Django: ImproperlyConfigured: The SECRET_KEY setting must not be empty
... up multiple setting files (development, production, ..) that include some base settings. Cannot succeed though. When I try to run ./manage.py runserver I am getting the following error:
...
In C++, what is a virtual base class?
I want to know what a " virtual base class " is and what it means.
11 Answers
11
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C# Error: Parent does not contain a constructor that takes 0 arguments
...ct the situation, you need to add an explicit call:
public Child(int i) : base(i)
{
Console.WriteLine("child");
}
Or, you can just add a parameterless parent constructor:
protected Parent() { }
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Compare object instances for equality by their attributes
...le objects, and then compare results
from collections.abc import Iterable
BASE_TYPES = [str, int, float, bool, type(None)]
def base_typed(obj):
"""Recursive reflection method to convert any object property into a comparable form.
"""
T = type(obj)
from_numpy = T.__module__ == 'num...