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How to use my view helpers in my ActionMailer views?
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I thought these were supposed to be automatically included in Rails 4? guides.rubyonrails.org/…
– gabeodess
Jan 28 '15 at 22:21
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How to achieve code folding effects in Emacs?
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Folding is generally unnecessary with emacs, as it has tools that explicitly implement the actions people do manually when folding code.
Most people have good success with simple incremental searches. See "foo" mentioned somewhere? Type C-...
What's the foolproof way to tell which version(s) of .NET are installed on a production Windows Serv
...are looking for this info, and go to this site: http://www.hanselman.com/smallestdotnet/
That's all it takes.
The site has a script that looks your browser's "UserAgent" and figures out what version (if any) of the .NET Framework you have (or don't have) installed, and displays it automatically (t...
CSS vertical alignment text inside li
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line-height is how you vertically align text. It is pretty standard and I don't consider it a "hack". Just add line-height: 100px to your ul.catBlock li and it will be fine.
In this case you may have to add it to ul.catBlock li a instead since all of th...
How to filter Pandas dataframe using 'in' and 'not in' like in SQL
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If you're actually dealing with 1-dimensional arrays (like in you're example) then on you're first line use a Series instead of a DataFrame, like @DSM used: df = pd.Series({'countries':['US','UK','Germany','China']})
–...
Advantages of using prototype, vs defining methods straight in the constructor? [duplicate]
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Methods that inherit via the prototype chain can be changed universally for all instances, for example:
function Class () {}
Class.prototype.calc = function (a, b) {
return a + b;
}
// Create 2 instances:
var ins1 = new Class(),
ins2 = new Class();
// Test the calc method:
console...
Visual Studio displaying errors even if projects build
I have a problem with Visual Studio on a C# solution. It displays totally random errors, but the projects build. Right now, I have 33 files with errors, and I can see red squiggly lines in all of them.
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The data-toggle attributes in Twitter Bootstrap
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It is a Bootstrap data attribute that automatically hooks up the element to the type of widget it is. Data-* is part of the html5 spec, and data-toggle is specific to Bootstrap.
Some Examples:
data-toggle="modal"
data-toggle="collapse"
data-toggle="dropdown"
data-toggle...
What's the difference between ConcurrentHashMap and Collections.synchronizedMap(Map)?
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For your needs, use ConcurrentHashMap. It allows concurrent modification of the Map from several threads without the need to block them. Collections.synchronizedMap(map) creates a blocking Map which will degrade performance, albeit ensure consistency (if used properl...
How to run a function when the page is loaded?
...e JavaScript has adopted some great functions since the release of jQuery. All modern browsers now have their own DOM ready function without the use of a jQuery library.
I'd recommend this if you use native Javascript.
document.addEventListener('DOMContentLoaded', function() {
alert("Ready!")...