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What is the fastest or most elegant way to compute a set difference using Javascript arrays?
...'t know if this is most effective, but perhaps the shortest
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(function(x) { return B.indexOf(x) < 0 })
console.log(diff);
Updated to ES6:
A = [1, 2, 3, 4];
B = [1, 3, 4, 7];
diff = A.filter(x => !B.includes(x) );
console.log(diff);
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List of installed gems?
...puts specs[0..5].map{ |s| "#{s.name} #{s.version}" }
# >> Platform 0.4.0
# >> abstract 1.0.0
# >> actionmailer 3.0.5
# >> actionpack 3.0.5
# >> activemodel 3.0.5
# >> activerecord 3.0.5
Here's an updated way to get a list:
require 'rubygems'
def local_gems
...
Getting Checkbox Value in ASP.NET MVC 4
I'm working on an ASP.NET MVC 4 app. This app has a basic form. The model for my form looks like the following:
18 Answers
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How do you set EditText to only accept numeric values in Android?
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408
Add android:inputType="number" as an XML attribute.
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Method has the same erasure as another method in type
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ericksonerickson
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Generate random string/characters in JavaScript
...haracters = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789';
var charactersLength = characters.length;
for ( var i = 0; i < length; i++ ) {
result += characters.charAt(Math.floor(Math.random() * charactersLength));
}
return result;
}
console.log(m...
Android ADB device offline, can't issue commands
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140
I just got the same problem today after my Nexus 7 and Galaxy Nexus were updated to Android 4.2...
Cast to int vs floor
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194
Casting to an int will truncate toward zero. floor() will truncate toward negative infinite. T...
What is the javascript MIME type for the type attribute of a script tag? [duplicate]
...ar as the javascript is concerned, but it's part of the spec for both HTML 4 and XHTML 1.0.
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Why do objects of the same class have access to each other's private data?
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AnTAnT
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