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Default template arguments for function templates
Why are default template arguments only allowed on class templates? Why can't we define a default type in a member function template? For example:
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What's the best way to check if a file exists in C?
Is there a better way than simply trying to open the file?
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Saving utf-8 texts in json.dumps as UTF8, not as \u escape sequence
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Getting the count of unique values in a column in bash
I have tab delimited files with several columns. I want to count the frequency of occurrence of the different values in a column for all the files in a folder and sort them in decreasing order of count (highest count first). How would I accomplish this in a Linux command line environment?
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Normalizing mousewheel speed across browsers
For a different question I composed this answer , including this sample code .
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Convert column classes in data.table
I have a problem using data.table: How do I convert column classes? Here is a simple example: With data.frame I don't have a problem converting it, with data.table I just don't know how:
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分布式系统的事务处理 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...致性，但为了本文的简单易读，我只说下面三种）：
1）Weak 弱一致性：当你写入一个新值后，读操作在数据副本上可能读出来，也可能读不出来。比如：某些cache系统，网络游戏其它玩家的数据和你没什么关系，VOIP这样的系统...
How do I tell if a regular file does not exist in Bash?
I've used the following script to see if a file exists:
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live output from subprocess command
I'm using a python script as a driver for a hydrodynamics code. When it comes time to run the simulation, I use subprocess.Popen to run the code, collect the output from stdout and stderr into a subprocess.PIPE --- then I can print (and save to a log-file) the output information, and check for ...
SQL Server: Make all UPPER case to Proper Case/Title Case
I have a table that was imported as all UPPER CASE and I would like to turn it into Proper Case. What script have any of you used to complete this?
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