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How do I add a simple onClick event handler to a canvas element?

... attaches a click event to the canvas element, and then pushes one shape (called an element in my code) to an elements array. You could add as many as you wish here. The purpose of creating an array of objects is so we can query their properties later. After all the elements have been pushed onto t...
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How to prevent form from submitting multiple times from client side?

... I tried this solution with unobtrusive validation & MVC. The JS gets called first which always return false and then validation is called. So if my form has some validation error the form never gets submitted!! – bjan Jun 8 '12 at 12:09 ...
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eval command in Bash and its typical uses

...de the parentheses in a subshell (i.e. in a separate process that inherits all settings such as variable values from the current shell), and gathers its output. So echo $($n) runs $n as a shell command, and displays its output. Since $n evaluates to 1, $($n) attempts to run the command 1, which does...
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Mongod complains that there is no /data/db folder

...ere you can create the data directory in another location, but that's generally not a good idea, because it just slightly complicates things such as DB recovery, because you always have to specify the db-path manually. I wouldn't recommend doing that. Edit: the error message you're getting is ...
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iOS5 Storyboard error: Storyboards are unavailable on iOS 4.3 and prior

I've built a small app using storyboards and it ran great. Just before final testing I decided to try it out to see if it runs on iOS 4.3. I clicked on the gray 5.0 in the project settings and selected 4.3. ...
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C# - Keyword usage virtual+override vs. new

... here, the new / override keyword for the metods determine which metod is called when you put a Bar into a Foo variable. – Thomas N Apr 20 '15 at 13:00 ...
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How to display length of filtered ng-repeat data

...h filters the data. val would be the text that is typed in the input (basically query) but each time I type, it changes. But what is filterFilter here? I might add that I have my own customFilter created (wherein I can specify which key of the object to consider for filtering). ...
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If i synchronized two methods on the same class, can they run simultaneously?

... a add on to this question. Suppose both method are static now methodA is called using Class while methodB is called using object like A.methodA() in t1 and obj.methodB() in t2. What will happen now, will they block???? – amod Mar 21 '13 at 12:16 ...
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Loader lock error

... If I run the project as Native debugging, with all exceptions on default (reset all), the debug window shows <mda:msg xmlns:mda="schemas.microsoft.com/CLR/2004/10/mda"> <!-- Attempting managed execution inside OS Loader lock.... etc --> <mda...
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Removing MySQL 5.7 Completely [closed]

I am trying to uninstall mysql from my ubuntu 12.04 completely. But not able to. 3 Answers ...