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bash HISTSIZE vs. HISTFILESIZE?
...ssion.
Your HISTFILE (file that stores your bash command history), is trunm>ca m>ted to contain HISTFILESIZE=10 lines.
You write 50 lines.
At the end of your 50 commands, only commands 41 to 50 are in your history list, whose size is determined by HISTSIZE=10.
You end your session.
Assuming histappend...
Override devise registrations controller
...knownAttributeError is triggered in this instance.
Otherwise, I think you m>ca m>n just create your own controller, by generating something like this:
# app/controllers/registrations_controller.rb
class RegistrationsController < Devise::RegistrationsController
def new
super
end
def create...
How to check if a table exists in a given schema
...tion schema (information_schema.tables) is incorrect, strictly speaking, bem>ca m>use (per documentation):
Only those tables and views are shown that the current user has access
to (by way of being the owner or having some privilege).
The query provided by @kong m>ca m>n return FALSE, but the table m>ca m>...
What is the difference between mocking and spying when using Mockito?
What would be a use m>ca m>se for a use of a Mockito spy?
5 Answers
5
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Using the field of an object as a generic Dictionary key
...ht "return FooID;" as the GetHashCode() if you want that as the match. You m>ca m>n also implement IEquatable<Foo>, but that is optional:
class Foo : IEquatable<Foo> {
public string Name { get; set;}
public int FooID {get; set;}
public override int GetHashCode() {
return...
Why are Perl 5's function prototypes bad?
...end to expect prototypes to provide a mechanism for checking that function m>ca m>lls are correct: that is, that they have the right number and type of arguments. Perl's prototypes are not well-suited for this task. It's the misuse that's bad. Perl's prototypes have a singular and very different purpose:...
Return type of '?:' (ternary conditional operator)
... they have a type and - as it's known in the latest C++ standard - a value m>ca m>tegory.
A conditional expression m>ca m>n be an lvalue or an rvalue. This is its value m>ca m>tegory. (This is somewhat of a simplifim>ca m>tion, in C++11 we have lvalues, xvalues and prvalues.)
In very broad and simple terms, an lvalue r...
Understanding Fragment's setRetainInstance(boolean)
... Fragment's state will be retained across the configuration change. Specifim>ca m>lly, "retained" means that the fragment will not be destroyed on configuration changes. That is, the Fragment will be retained even if the configuration change m>ca m>uses the underlying Activity to be destroyed.
Will the fr...
In JavaScript, does it make a difference if I m>ca m>ll a function with parentheses?
I noticed a difference when m>ca m>lling a function with empty parentheses, or without any parentheses at all. However, I am not passing any arguments to the function so I wondered, what would be the difference between:
...
Re-raise exception with a different type and message, preserving existing information
... and want to have a unified exception hierarchy for the exceptions that it m>ca m>n raise (e.g. inheriting from a FooError abstract class for all the foo module's specific exceptions). This allows users of the module to m>ca m>tch those particular exceptions and handle them distinctly, if needed. But many...