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Rails 4 multiple image or file upload using carrierwave
...aveuploader/carrierwave'
Create a column in the intended model to host an array of images:
rails generate migration AddPicturesToProducts pictures:json
Run the migration
bundle exec rake db:migrate
Add pictures to model Product
app/models/product.rb
class Product < ActiveRecord::Base
val...
Passing a String by Reference in Java?
...tring data; }
void fillString(Container c) { c.data += "foo"; }
Create an array:
new String[] zText = new String[1];
zText[0] = "";
void fillString(String[] zText) { zText[0] += "foo"; }
From a performance point of view, the StringBuilder is usually the best option.
...
Multiple Inheritance in PHP
...multiInherit class. A protected variable in a child class could contain an array of classes to inherit. The constructor in the multi-interface class could create instances of each of the classes that are being inherited and link them to a private property, say _ext. The __call() method could use the...
What is the most efficient way to store a list in the Django models?
...
If you are using Django >= 1.9 with Postgres you can make use of ArrayField advantages
A field for storing lists of data. Most field types can be used, you
simply pass another field instance as the base_field. You may also
specify a size. ArrayField can be nested to store multi-di...
What are the barriers to understanding pointers and what can be done to overcome them? [closed]
...elow looks like this:
type
THouse = class
private
FName : array[0..9] of Char;
public
constructor Create(name: PChar);
end;
When you initialize the house object, the name given to the constructor is copied into the private field FName. There is a reason it is defin...
Dynamic type languages versus static type languages
... Clojure's PersistentVector implementation due to its use of heterogeneous arrays. It works at runtime, but the type system cannot verify it.
For that reason, most type systems provide "escapes", ways to override the static checker. For most languages, these take the form of casting, though some ...
Javascript Split string on UpperCase Characters
How do you split a string into an array in Javascript by UpperCase character?
4 Answers
...
XSLT equivalent for JSON [closed]
...Last commit Mar 4, 2015
Jsawk is like awk, but for JSON. You work with an array of JSON objects read from stdin, filter them using JavaScript to produce a results array that is printed to stdout.
15. yate Last Commit Mar 13, 2017
Tests can be used as docu https://github.com/pasaran/yate/tree/mast...
How do you serialize a model instance in Django?
...
To avoid the array wrapper, remove it before you return the response:
import json
from django.core import serializers
def getObject(request, id):
obj = MyModel.objects.get(pk=id)
data = serializers.serialize('json', [obj,])
...
Android: How can I pass parameters to AsyncTask's onPreExecute()?
...in a different thread from the main one. Here we have as an input value an array of objects from the type “X” (Do you see in the header? We have “...extends AsyncTask” These are the TYPES of the input parameters) and returns an object from the type “Z”.
protected void onProgressUpdate(Y...