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How to convert timestamps to dates in Bash?
I need a shell command or script that converts a Unix timestamp to a date. The input can come either from the first parameter or from stdin, allowing for the following usage patterns:
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How to get numbers after decimal point?
...On a Raspberry Pi this method x%1 was almost twice as fast as the x-int(x) and modf(x)[0] methods (the timings were 980ns, 1.39us, and 1.47us averaged over 1000000 runs). My value for x was always positive so I did not have to worry about that.
– coderforlife
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STL 算法 - C/C++ - 清泛网 - 专注C/C++及内核技术
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STL算法概述
简介:
STL算法部分主要由头文件<algorithm>,<numeric>,<functional>组成。要使用 STL中的算法函数必须包含头文件<algorithm>，对于数值算法须包含<numeric>，<functional>中则定义了一些模板类，用来声明函数对象
注意:
编译器...
What is the difference between exit and return? [duplicate]
What is difference between return and exit statement in C programming when called from anywhere in a C program?
4 Answers
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check if a std::vector contains a certain object? [duplicate]
...erator==. If you need to account for numerical tolerance, use std::find_if and supply a suitable predicate.
– You
Aug 20 '15 at 18:38
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Get the current time in C
...);
timeinfo = localtime ( &rawtime );
printf ( "Current local time and date: %s", asctime (timeinfo) );
return 0;
}
(just add "void" to the main() arguments list in order for this to work in C)
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Show filename and line number in grep output
... to search my rails directory using grep. I am looking for a specific word and I want to grep to print out the file name and line number.
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Linux进程与线程总结 [推荐] - C/C++ - 清泛网 - 专注C/C++及内核技术
Linux进程与线程总结 [推荐]本文介绍了Linux环境下进程与线程的基本概念以及它们之间的差异，简要介绍了Linux多进程与多线程编程的基本方法及同步机制，还介绍了进程间 本文介绍了Linux环境下进程与线程的基本概念以及它们...
How can foreign key constraints be temporarily disabled using T-SQL?
Are disabling and enabling foreign key constraints supported in SQL Server? Or is my only option to drop and then re-create the constraints?
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Standard concise way to copy a file in Java?
...ning streams, declaring a buffer, reading in one file, looping through it, and writing it out to the other steam. The web is littered with similar, yet still slightly different implementations of this type of solution.
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