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How do I calculate the normal vector of a line segment?
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How to prevent browser page caching in Rails
...nse.headers["Expires"] = "Mon, 01 Jan 1990 00:00:00 GMT"
end
end
Rails 4 and older versions:
class ApplicationController < ActionController::Base
before_filter :set_cache_headers
private
def set_cache_headers
response.headers["Cache-Control"] = "no-cache, no-store"
response....
How to Diff between local uncommitted changes and origin
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Redis is single-threaded, then how does it do concurrent I/O?
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ChrisCantrell
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answered May 8 '12 at 8:51
Didier SpeziaDidier S...
How to make inline functions in C#
...mparison<string> compare3 = compare1; // this one only works from C# 4.0 onwards
These can be invoked directly as if they were regular methods:
int x = add(23, 17); // x == 40
print(x); // outputs 40
helloWorld(x); // helloWorld has one int parameter declared: Action<int>
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iOS 7 TextKit - How to insert images inline with text?
...t:textAttachment];
[attributedString replaceCharactersInRange:NSMakeRange(4, 1) withAttributedString:attrStringWithImage];
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mongodb count num of distinct values per field/key
...nd", "France", "Australia" ]
> db.countries.distinct('country').length
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how to permit an array with strong parameters
...ses has_many :through associations which is not, as I remake it as a Rails 4 app, letting me save ids from the associated model in the Rails 4 version.
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How can I initialize an ArrayList with all zeroes in Java?
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The integer passed to the constructor represents its initial capacity, i.e., the number of ele...
How can I do division with variables in a Linux shell?
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edited Aug 7 '13 at 3:04
answered Aug 7 '13 at 2:59
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