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Overlaying histograms with ggplot2 in R

...stogram(data = highf0, fill = "green", alpha = 0.2) + Here's a concrete example with some output: dat <- data.frame(xx = c(runif(100,20,50),runif(100,40,80),runif(100,0,30)),yy = rep(letters[1:3],each = 100)) ggplot(dat,aes(x=xx)) + geom_histogram(data=subset(dat,yy == 'a'),fill = "red",...
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Can a constructor in Java be private?

...e it private, but then your remaining constructors delegate to it. As an example of delegating constructors, the following class allows you to save a value and a type, but it only lets you do it for a subset of types, so making the general constructor private is needed to ensure that only the permi...
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How to check if an element does NOT have a specific class?

How do I check if there isn't a class. For example, I know how to check to see if it has the class "test", but how do I check to see if it doesn't have the class "test"? ...
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Static/Dynamic vs Strong/Weak

... ++ for (roughly) single line definitions. – JamesFaix Jan 8 '16 at 2:26  |  show 6 more comments ...
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load scripts asynchronously

... t; r = false; s = document.createElement('script'); s.type = 'text/javascript'; s.src = src; s.onload = s.onreadystatechange = function() { //console.log( this.readyState ); //uncomment this line to see which ready states are called. if ( !r && (!this.readyState || thi...
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Add comma to numbers every three digits

... @Paul Creasey had the simplest solution as the regex, but here it is as a simple jQuery plugin: $.fn.digits = function(){ return this.each(function(){ $(this).text( $(this).text().replace(/(\d)(?=(\d\d\d)+(?!\d))/g, "$1,") ); }) } You could then use it l...
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In Python, when should I use a function instead of a method?

...: pass def crap(self) : pass def die(self) .... In the context of the "objects are real things" analogy, it is "correct" to add a class method for anything which the object can do. So say I want to kill off a duck, do I add a .kill() to the duck? No... as far as I know animals do not ...
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How do I check if the mouse is over an element in jQuery?

...e data. Remove the data on callback of the fadeout. It is actually less expensive to use mouseenter/mouseleave because they do not fire for the menu when children mouseover/mouseout fire. share | ...
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How to edit incorrect commit message in Mercurial? [duplicate]

...lover disasters is to perform a simple change (add or remove spacing) and explain your mistake in the next commit message. – Ryan Aug 16 '11 at 0:33 ...
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Outputting data from unit test in python

...ttest module), is it possible to output data from a failed test, so I can examine it to help deduce what caused the error? I am aware of the ability to create a customized message, which can carry some information, but sometimes you might deal with more complex data, that can't easily be represented...