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What is a callback URL in relation to an API?

...l = function(e) { var $elem = $('.new-login-left'), docViewTop = $window.scrollTop(), docViewBottom = docViewTop + $window.height(), ...
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Which characters are valid in CSS class names/selectors?

...he CSS class selectors? I know that the following characters are invalid , but what characters are valid ? 10 Answers...
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simulate background-size:cover on or

...the functionality of background-size:cover on an html element like <video> or <img> ? 18 Answers ...
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What are the benefits to marking a field as `readonly` in C#?

...at once the object is fully constructed, that field cannot be pointed to a new value. However "readonly" is very different from other types of read-only semantics because it's enforced at runtime by the CLR. The readonly keyword compiles down to .initonly which is verifiable by the CLR. The rea...
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Manually put files to Android emulator SD card

...m just having trouble with getting my emulator SD card work... I created a new AVD device with a new SD card. 6 Answers ...
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iPhone Simulator suddenly started running very slow

... Not sure why this worked, but I saved but I made a new copy of the project and re-ran the simulator and it is back to full speed. I am not sure if this is just a coincidence though. – Finglish Mar 11 '13 at 22:24 ...
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Numeric for loop in Django templates

... Great answer! Didn't have to create a new filter. – Miguel Ike Nov 14 '16 at 17:53 ...
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Aggregate / summarize multiple variables per group (e.g. sum, mean)

...reshape2 package for this task: require(reshape2) df_melt <- melt(df1, id = c("date", "year", "month")) dcast(df_melt, year + month ~ variable, sum) # year month x1 x2 1 2000 1 -80.83405 -224.9540159 2 2000 2 -223.76331 -288.2418017 3 2000 3 -188.83930 -481.560...
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How do I get a distinct, ordered list of names from a DataTable using LINQ?

...plit it up into multiple LINQ statements. First, select your data into a new list, let's call it x1, do a projection if desired Next, create a distinct list, from x1 into x2, using whatever distinction you require Finally, create an ordered list, from x2 into x3, sorting by whatever you desire ...
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Git update submodules recursively

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