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给定字符串 代表石头中宝石的类型，和字符串 代表你拥有的石头。 中每个字符代表了一种你拥有的石头的类型，你想知道你拥有的石头中有多少是宝石。 中的字母不重复， 和 中的所有字符都是字母。字母区分大小写，因此"a"和"A"是不同类型的石头。 示例 1: 示例 2: 注意: S 和 J 最多含有50个字 阅读全文
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One single command should work "[1]" But error occurs: Solved by adding Open cloudcompare in a terminal "[2]" or Error occurs: Solved by answer "[3]" 阅读全文
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Somehow I find have to be keep reinstalling "[1]" When does this happen I can't do Error code: And I have totally no idea why this would happen to g2o 阅读全文
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Install kinect2 drivers "[1]" Assume have installed drivers successfully Note: A new workspace "[2]" is needed for building with type "Release" Launch 阅读全文
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Refences: "1] [rtabmap_ros/Tutorials/HandHeldMapping ROS Wiki" 阅读全文
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Problem background Let's say I have a bunch of points on a 3D line. Each of them is an variable with three values of x, y, and z of its coordinate. Th 阅读全文
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Use or can do this Let me finished the code snippet once other work done. References: [1] [（十）ROS在rviz中显示空间中的直线（visualization_msgs/Marker 消息）(https:// 阅读全文
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The most common way to do this is by subscript in the "] operand[[1]" The more efficient way is to use an iterator "[2]" "[3]" The example in "Euclide 阅读全文
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Experiments Preparation In the directory of In another terminal, open . Choose , then left click the point whose position you want to know . On the le 阅读全文
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```
sudo apt install ruby gnuplot
``` 阅读全文