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What is the difference between pluck and collect in Rails?
...particular field. See this.
When you do:
User.first.gifts.collect(&:id)
You have objects with all fields loaded and you simply get the id thanks to the method based on Enumerable.
So:
if you only need the id with Rails 4, use ids: User.first.gifts.ids
if you only need some fields with Ra...
Storing R.drawable IDs in XML array
I would like to store drawable resources' ID in the form of R.drawable.* inside an array using an XML values file, and then retrieve the array in my activity.
...
Overriding id on create in ActiveRecord
Is there any way of overriding a model's id value on create? Something like:
13 Answers
...
Change Active Menu Item on Page Scroll?
...ll position
var fromTop = $(this).scrollTop()+topMenuHeight;
// Get id of current scroll item
var cur = scrollItems.map(function(){
if ($(this).offset().top < fromTop)
return this;
});
// Get the id of the current element
cur = cur[cur.length-1];
var id = cur &am...
Code First: Independent associations vs. Foreign key associations?
...will definitely use Entity reference:
public class Order
{
public int ID { get; set; }
public Customer Customer { get; set; } // <-- Customer object
...
}
Once you generate an entity model from a database with FKs it will always generate entity references. If you don't want to use ...
ORDER BY the IN value list
...a simple SQL query in PostgreSQL 8.3 that grabs a bunch of comments. I provide a sorted list of values to the IN construct in the WHERE clause:
...
What is the purpose of Android's tag in XML layouts?
...
<merge/> is useful because it can get rid of unneeded ViewGroups, i.e. layouts that are simply used to wrap other views and serve no purpose themselves.
For example, if you were to <include/> a layout from another file without using merge, the two files mig...
Instagram how to get my user id from username?
...of embedding my image feed in my website using JSON, the URL needs my user id so I can retrieve this feed.
24 Answers
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How to set value of input text using jQuery
...rounding <div class='textBoxEmployeeNumber'> instead of the input inside it.
// Access the input inside the div with this selector:
$(function () {
$('.textBoxEmployeeNumber input').val("fgg");
});
Update after seeing output HTML
If the ASP.NET code reliably outputs the HTML <input>...
When to use next() and return next() in Node.js
Scenario : Consider the following is the part of code from a node web app.
5 Answers
5...