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C# Events and Thread Safety

... be out of date, but that's all. It won't cause a NullReferenceException. And yes, there's certainly a race condition - but there always will be. Suppose we just change the code to: TheEvent(this, EventArgs.Empty); Now suppose that the invocation list for that delegate has 1000 entries. It's per...
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How to add leading zeros?

...s of 10 width 8 too. anim <- 25499:25504 x <- 10 ^ (0:5) paste (and it's variant paste0) are often the first string manipulation functions that you come across. They aren't really designed for manipulating numbers, but they can be used for that. In the simple case where we always have t...
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How to combine multiple conditions to subset a data-frame using “OR”?

... the following syntax before with lot of success when I wanted to use the "AND" condition. 3 Answers ...
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How can I force division to be floating point? Division keeps rounding down to 0?

I have two integer values a and b , but I need their ratio in floating point. I know that a < b and I want to calculate a / b , so if I use integer division I'll always get 0 with a remainder of a . ...
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Using Rails 3.1, where do you put your “page specific” JavaScript code?

To my understanding, all of your JavaScript gets merged into 1 file. Rails does this by default when it adds //= require_tree . to the bottom of your application.js manifest file. ...
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Check if an image is loaded (no errors) with jQuery

...ng, when an error occurs it does something else. I'm using jQuery load() and error() methods as events. After these events I check the image DOM element for the .complete to make sure the image wasn't already loaded before jQuery could register the events. ...
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Rename package in Android Studio

How do you rename packages in the new IDE Android Studio, based on IntelliJ IDEA? 52 Answers ...
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How can I make setInterval also work when a tab is inactive in Chrome?

... On most browsers inactive tabs have low priority execution and this can affect JavaScript timers. If the values of your transition were calculated using real time elapsed between frames instead fixed increments on each interval, you not only workaround this issue but also can achiev...
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How to overload std::swap()

std::swap() is used by many std containers (such as std::list and std::vector ) during sorting and even assignment. 4 A...
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How do I measure time elapsed in Java? [duplicate]

...answers posted so far are quite right. If you are measuring elapsed time, and you want it to be correct, you must use System.nanoTime(). You cannot use System.currentTimeMillis(), unless you don't mind your result being wrong. The purpose of nanoTime is to measure elapsed time, and the purpose of...