scope

问题 I have a user model. I'm trying to set my user index view to show only those users who have completed an onboarding process. My approach to doing that is: index: <% Users.onboarded.each do |user| %> In my user.rb, I tried to define a scope, for onboarding, as: scope :onboarded, -> { where (:user_is_matchable?) } I have a method in my organisation service class which has: class UserOrganisationMapperService attr_accessor :user private def user_is_matchable? profile.present? && matching

问题 I am a novice at C#, yet I know I should be able to figure this out. My searching skills have not given me a direct answer either. I have two application settings that are stored in string arrays (they have been split from a , separated list). Ultimately I want to run one chunk of code, conditional upon both settings. Conditions are: If settings exist in array 1 (domattributes), run the code on each setting value. If settings also exist in array 2 (intlattributes), run the code on each

问题 one question I always ask myself is how is it possible that javascript has still a reference in a callback function of a AJAX request when the variable was declared in the function which isssues the AJAX call. Here an example var loadMask = {name:"test"}; form.submit({ url: 'request.php', timeout : 180000, success: function(the_form, action_object) { console.log(loadMask); } }); despite the fact that loadMask was declared outside of the success function it is still visible (and defined)

问题 I am trying to learn how to use scopes in my Rails 5 app. I have asked a background question here. have models in my Rails 5 app for User, Proposal and Potential. Users create Proposals which they themselves and others can then create comments on. The associations between models are: User has_many :proposals, dependent: :destroy has_many :potentials Proposal belongs_to :user has_many :potentials, inverse_of: :proposal accepts_nested_attributes_for :potentials, reject_if: :all_blank, allow

问题 I understand that functions called without the "new" keyword spit out all their properties on to the global context. But I am seeing some curious behavior, with this piece of Javascript code: function Test3() { var a=0; this.inc = function() { return ++a; }; this.noInc = function() { return a; }; this.testRef = function() { return this; }; return { inc: inc, testRef: testRef, noInc: noInc }; } var o = Test3(); // Put func properties on global context var o2 = Test3(); // Put func properties

问题 I have looked through countless examples which indicate that this is supposed to work, but it does not. I was wondering if someone could have a look and indicate why. I am trying to access the variable "dia" from within the setTimeout function, but it always returns undefined: var dialogue = new Array(); dialogue[0] = 'Hi there Mo, I am Mark. I will be guiding through the game for you today'; dialogue[1] = 'Hey there Mark, how you doing?'; dialogue[2] = 'I am doing fine sweetie pie, how about

问题 I have looked through countless examples which indicate that this is supposed to work, but it does not. I was wondering if someone could have a look and indicate why. I am trying to access the variable "dia" from within the setTimeout function, but it always returns undefined: var dialogue = new Array(); dialogue[0] = 'Hi there Mo, I am Mark. I will be guiding through the game for you today'; dialogue[1] = 'Hey there Mark, how you doing?'; dialogue[2] = 'I am doing fine sweetie pie, how about

问题 I would like to do something like this: container::iterator it = NULL; switch ( eSomeEnum ) { case Container1: it = vecContainer1.begin(); break; case Container2: it = vecContainer2.begin(); break; ... } for( ; it != itEnd ; ++it ) { .. } But I can't create and initialise an iterator to NULL. Is there some way I can do this? Ideally I would just create and assign the iterator in the switch, but then it would go out of scope immediately. 回答1: You just needn't initialize it at all, because

问题 I have done some tests with codes listed below: function foo(x) { alert(y); } var y = 'I am defined outside foo definition'; foo(); The above code gives me an alert 'I am defined outside foo definition'. Then another test: function bar(x) { alert(x); } var x = 'I am defined outside foo definition'; bar(); function bar(x) { alert(x); } x = 'I am defined outside bar definition'; bar(); Both the above codes give me an alert 'undefined'. So Why? 回答1: This is because when you declare the parameter

问题 Inside the standard isClient conditional I have a variable stored. Let's say I needed to access this from the window , where would it be located? if (Meteor.isClient) { var people = new Meteor.Collection("people"); } Thanks! 回答1: In Meteor client environment, every variable you declare without the var keyword is accessible on the global object which is window . if (Meteor.isClient) { people = new Meteor.Collection("people"); console.log(window.people._name); // displays "people" in the