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What's the difference between tilde(~) and caret(^) in package.json?
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Is there a way to detect if an image is blurry?
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What is the best way to compute trending topics or tags?
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Regular expression for first and last name
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edited Feb 17 '14 at 9:57
John Smith
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answered Mar 5...
Why are these numbers not equal?
...ally true because some values which are simple, finite decimals (such as 0.1 and 0.05) are not represented exactly in the computer and so the results of arithmetic on them may not give a result that is identical to a direct representation of the "known" answer.
This is a well known limitation of co...
Why #define TRUE (1==1) in a C boolean macro instead of simply as 1?
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This approach will use the actual boolean type (and resolve to true and false) if the compiler...
灰度图中找出深色像素并给出坐标 · App Inventor 2 中文网
...、蓝、透明度四个数；灰度图的三个颜色分量相等，第 1 项就是灰度值（0 最黑，255 最白）；
颜色抽屉的「是深色吗」：直接判断一个颜色是不是深色。
思路：取颜色 → 算灰度 → 和阈值比较。灰度小于阈值就算深色，阈...
How can I plot with 2 different y-axes?
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update: Copied material that was on the R wiki at http://rwiki.sciviews.org/doku.php?id=tips:g...
Ruby - elegantly convert variable to an array if not an array already
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