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Where to define custom error types in Ruby and/or Rails?
...below, so that your validations will fail:
def MyModel < ActiveRecord::Base
validate :code_does_not_contain_hyphens
def code_does_not_contain_hyphens
errors.add(:code, "cannot contain hyphens") if code.include?("-")
end
end
When validations are run, this method will piggy-back onto ...
How to format a duration in java? (e.g format H:MM:SS)
...alDuration implements TemporalAccessor {
private static final Temporal BASE_TEMPORAL = LocalDateTime.of(0, 1, 1, 0, 0);
private final Duration duration;
private final Temporal temporal;
public TemporalDuration(Duration duration) {
this.duration = duration;
this.temp...
How to access parent scope from within a custom directive *with own scope* in AngularJS?
... function in these examples but you can use a directive controller as well based on requirement.
Option#1. Through Object literal and from directive html template
index.html
<!DOCTYPE html>
<html ng-app="plunker">
<head>
<meta charset="utf-8" />
<title>Ang...
How to call getClass() from a static method in Java?
...ck has a benefit of being copy/paste safe...
Caution when using this in a Base Class that other classes inherit from:
It is also worth noting that if this snippet is shaped as a static method of some base class then currentClass value will always be a reference to that base class rather than to an...
Using Sinatra for larger projects via multiple files
...g:
thin -R config.ru start
Edit: I'm now maintaining my own Monk skeleton based on the below called Riblits. To use it to copy my template as the basis for your own projects:
# Before creating your project
monk add riblits git://github.com/Phrogz/riblits.git
# Inside your empty project directory
...
Can you get DB username, pw, database name in Rails?
...ain the necessary information from it:
config = Rails.configuration.database_configuration
host = config[Rails.env]["host"]
database = config[Rails.env]["database"]
username = config[Rails.env]["username"]
password = config[Rails.env]["password"]
See the documentation for Rails::Configurati...
Event system in Python
...even source classes to derive from pydispatch.Dispatcher.
buslane is class-based, supports single- or multiple handlers and facilitates extensive type hints.
Pithikos' Observer/Event is a lightweight design.
Publish-subscribe libraries:
blinker has some nifty features such as automatic disconnecti...
What do column flags mean in MySQL Workbench?
...as binary strings. There is no character set so sorting and comparison is based on the numeric values of the bytes in the values.)
UN - Unsigned (non-negative numbers only. so if the range is -500 to 500, instead its 0 - 1000, the range is the same but it starts at 0)
UQ - Create/remove Unique...
How do I convert hex to decimal in Python? [duplicate]
... int(0xff) will do the right thing. It only requires an explicit base if it's passed as a string.
– cassm
Jan 15 '16 at 17:11
...
How to find out client ID of component for ajax update/render? Cannot find component with expression
... end result is the same:
Identify the UIComponent that will be the base for searching, by stopping as soon as one of the following conditions is met:
If the search expression begins with the the separator character (called an "absolute" search expression), the base will be the root U...