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What is the difference between t.belongs_to and t.references in rails?
...= options.delete(:polymorphic)
args.each do |col|
column("#{col}_id", :integer, options)
column("#{col}_type", :string, polymorphic.is_a?(Hash) ? polymorphic : options) unless polymorphic.nil?
end
end
alias :belongs_to :references
This is just a way of making your code more...
Javascript regex returning true.. then false.. then true.. etc [duplicate]
...e using a g (global) RegExp. In JavaScript, global regexen have state: you call them (with exec, test etc.) the first time, you get the first match in a given string. Call them again and you get the next match, and so on until you get no match and it resets to the start of the next string. You can a...
Big O, how do you calculate/approximate it?
...on is the size of the structure to process. It means that this function is called such as:
Number_Of_Steps = f(data.length)
The parameter N takes the data.length value. Now we need the actual definition of the function f(). This is done from the source code, in which each interesting line is numb...
Build android release apk on Phonegap 3.x CLI
How can I build an android app locally using the Phonegap 3.x CLI, ready to release? I check the bin folder generated inside the platforms/android directory of the project, and only has .debug APKs.
...
Scale image to fit a bounding box
...ere is no CSS only way to do this in both directions. You could add
.fillwidth {
min-width: 100%;
height: auto;
}
To the an element to always have it 100% width and automatically scale the height to the aspect ratio, or the inverse:
.fillheight {
min-height: 100%;
width: auto;
...
Uploading both data and files in one form using Ajax?
...
The problem I had was using the wrong jQuery identifier.
You can upload data and files with one form using ajax.
PHP + HTML
<?php
print_r($_POST);
print_r($_FILES);
?>
<form id="data" method="post" enctype="multipart/form-data">
<input type="text...
How to write a caption under an image?
...n: -moz-transform 0.2s;
-o-transition: -o-transform 0.2s;
}
<div id="container">
<a href="#">
<figure>
<img src="http://lorempixel.com/100/100/nature/1/" width="100px" height="100px" />
<figcaption>First image</figcaptio...
Initialize a byte array to a certain value, other than the default null? [duplicate]
... might want to turn that into an extension method, too. That way you could call it like byte[] b = new byte[5000].Initialize(0x20); The extension method would be declared as public static byte[] Initialize(this byte[] array, byte defaultValue) and contain the for loop. It should return the array.
...
Python argparse: Make at least one argument required
...ubcommands. Yet - as somebody pointed in the comments -x and --xxx are typically optional parameters.
– mac
Jul 17 '11 at 9:56
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Get class name of object as string in Swift
...for String for this initializer "an unspecified result is supplied automatically by the Swift standard library" when it doesn't conform to Streamable, or CustomStringConvertible, or CustomDebugStringConvertible. So while it may be displaying the desired value now, will it continue to do so in the ...