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Java heap terminology: young, old and permanent generations?

I'm trying to understand What the concepts of young , old and permanent generations are in the Java heap terminology, and more specifically the interactions between the three generations. ...
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Getting hold of the outer class object from the inner class object

I have the following code. I want to get hold of the outer class object using which I created the inner class object inner . How can I do it? ...
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Scatterplot with too many points

...ing to plot two variables where N=700K. The problem is that there is too much overlap, so that the plot becomes mostly a solid block of black. Is there any way of having a grayscale "cloud" where the darkness of the plot is a function of the number of points in an region? In other words, instead of ...
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Shell脚本编程30分钟入门 - 更多技术 - 清泛网 - 专注C/C++及内核技术

...nux_shell_30min_guides什么是Shell脚本示例看个例子吧:#! bin shcd ~mkdir shell_tutcd shell_tutfor ((i=0; i<10; i++)); do touch test_$i.txt... 什么是Shell脚本 示例 看个例子吧: #!/bin/sh cd ~ mkdir shell_tut cd shell_tut for ((i=0; i<10; i++)); do touch ...
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Why does i = i + i give me 0?

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How do I check which version of NumPy I'm using?

How can I check which version of NumPy I'm using? 15 Answers 15 ...
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Is there a difference between YES/NO,TRUE/FALSE and true/false in objective-c?

Simple question really; is there a difference between these values (and is there a difference between BOOL and bool)? A co-worker mentioned that they evaluate to different things in Objective-C, but when I looked at the typedefs in their respective .h files, YES/TRUE/true were all defined as 1 an...
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How to get a string after a specific substring?

How can I get a string after a specific substring? 9 Answers 9 ...
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Why are there no ++ and --​ operators in Python?

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Lost my schema.rb! Can it be regenerated?

Due to some deployment issues I stopped tracking schema.rb in git. Somehow I have stuffed this up and somewhere along the way my schema.rb file has disappeared. ...