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Get distance between two points in canvas

I have canvas drawing tab and want lineWidth to be based on distance between two last mousemove coordinate updates. I will make translation of distance to width myself, I just need to know how to get distance between those points (I already have coordinates of those pointes). ...
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Secondary axis with twinx(): how to add to legend?

I have a plot with two y-axes, using twinx() . I also give labels to the lines, and want to show them with legend() , but I only succeed to get the labels of one axis in the legend: ...
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How to pipe input to a Bash while loop and preserve variables after loop ends

Bash allows to use: cat <(echo "$FILECONTENT") 3 Answers 3 ...
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Better way of getting time in milliseconds in javascript?

Is there an alternative in JavaScript of getting time in milliseconds using the date object, or at least a way to reuse that object, without having to instantiate a new object every time I need to get this value? I am asking this because I am trying to make a simple game engine in JavaScript, and wh...
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How to convert boost path type to string?

Hello I currently have a program that gets a full path of a file's location and is put into a variable that is the type of: boost::filesystem2::path ...
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What is the difference between a regular string and a verbatim string?

I have a trial version of Resharper and it always suggests that I switch regular strings to verbatim strings. What is the difference? ...
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CSS3 Continuous Rotate Animation (Just like a loading sundial)

I am trying to replicate an Apple style activity indicator (sundial loading icon) by using a PNG and CSS3 animation. I have the image rotating and doing it continuously, but there seems to be a delay after the animation has finished before it does the next rotation. ...
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How to cast an object in Objective-C

Is there a way to cast objects in objective-c much like the way objects are cast in VB.NET? 5 Answers ...
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ggplot2 keep unused levels barplot

I want to plot unused levels (that is, levels where the count is 0) in my bar-plot, however, unused levels are dropped and I cannot figure out how to keep them ...
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Determine distance from the top of a div to top of window with javascript

How do I determine the distance between the very top of a div to the top of the current screen? I just want the pixel distance to the top of the current screen, not the top of the document. I've tried a few things like .offset() and .offsetHeight , but I just can't wrap my brain around it. Tha...