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Get average color of image via Javascript
...efinitely the best way to do this in the client. SVG is not, SVG is vector based. After I get the execution down, the next thing I want to do is get this running in the canvas (maybe with a webworker for each pixel's overall distance calculation).
Another thing to think about is that RGB is not a g...
How to properly handle a gzipped page when using curl?
...This would appear to be a curl bug, because it should trigger its decoding based on the response, not on what it requested (given that it does support gzip). To quote HTTP 1.1: "If no Accept-Encoding field is present in a request, the server MAY assume that the client will accept any content coding...
How does autowiring work in Spring?
...@Autowired then:
class EnglishGreeting {
@Autowired //so automatically based on the name it will identify the bean and inject.
private Greeting greeting;
//setter and getter
}
.xml file it will look alike if not using @Autowired:
<bean id="englishGreeting" class="com.bean.EnglishGree...
Does const mean thread-safe in C++11?
...l to set_size on a given rect, then area could end up computing its result based on an old width and a new height (or even on garbled values).
But that is alright, rect isn't const so its not even expected to be thread-safe after all. An object declared const rect, on the other hand, would be thread...
Ruby on Rails generates model field:type - what are the options for field:type?
...ences
That produces app/models/wheel.rb:
class Wheel < ActiveRecord::Base
belongs_to :car
end
And adds the following migration:
class CreateWheels < ActiveRecord::Migration
def self.up
create_table :wheels do |t|
t.references :car
t.timestamps
end
end
def se...
Returning redirect as response to XHR request
... fetch() is implemented natively. Polyfill versions of fetch()—which are based on XHR—continue to have XHR's limitations. Fortunately, native browser support seems to be rounding out nicely.
share
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How can I remove all my changes in my SVN working directory?
...relies on (I believe) a GNU-specific extension which allows xargs to split based on '\0' instead of whitespace.
The advantage to the above command is that it does not require any network activity to reset the sandbox. You get exactly what you had before, and you lose all your changes. (disclaimer b...
Is it possible to roll back CREATE TABLE and ALTER TABLE statements in major SQL databases?
...t?
PostgreSQL - yes
MySQL - no; DDL causes an implicit commit
Oracle Database 11g Release 2 and above - by default, no, but an alternative called edition-based redefinition exists
Older versions of Oracle - no; DDL causes an implicit commit
SQL Server - yes
Sybase Adaptive Server - yes
DB2 - yes
I...
JavaScript: How to find out if the user browser is Chrome?
...w Opera 18+ also outputs to true for window.chrome. Looks like Opera 18 is based on Chromium 31. So I added a check to make sure the window.navigator.vendor is: "Google Inc" and not is "Opera Software ASA". Also thanks to Ring and Adrien Be for the heads up about Chrome 33 not returning true anymore...
What are markers in Java Logging frameworks and what is a reason to use them?
...arked with the NOTIFY_ADMIN marker regardless of the log level. See marker-based triggering in the logback documentation. You may also combine log levels and markers for triggering.
Filtering: Markers are very useful for making certain valuable log statements stand out. For example, you can color/...