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How to convert String to long in Java?
I got a simple question in Java: How can I convert a String that was obtained by Long.toString() to long ?
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Count all occurrences of a string in lots of files with grep
I have a bunch of log files. I need to find out how many times a string occurs in all files.
15 Answers
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Command to get nth line of STDOUT
Is there any bash command that will let you get the nth line of STDOUT?
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初创公司如何利用社交媒体实现营销效果最大化？ - 资讯 - 清泛网 - 专注C/C...
...首先要评估一下自己的能力，不妨来看看下面这几类：
l 每周有多少时间可以花在社交媒体管理上：时间非常重要，因此你需要了解自己应该优先处理哪些社交媒体，有多少渠道要去管理。高效的社交媒体管理意味着重要的工...
Find the most common element in a list
What is an efficient way to find the most common element in a Python list?
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How to remove multiple indexes from a list at the same time? [duplicate]
Say I have this list here:
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What's the difference between a proc and a lambda in Ruby?
And when would you use one rather than the other?
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How do I pass a unique_ptr argument to a constructor or a function?
I'm new to move semantics in C++11 and I don't know very well how to handle unique_ptr parameters in constructors or functions. Consider this class referencing itself:
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How to get maximum value from the Collection (for example ArrayList)?
There is an ArrayList which stores integer values. I need to find the maximum value in this list. E.g. suppose the arrayList stored values are : 10, 20, 30, 40, 50 and the max
value would be 50 .
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Omit rows containing specific column of NA
I want to know how to omit NA values in a data frame, but only in some columns I am interested in.
8 Answers
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