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Ruby: What is the easiest way to remove the first element from an array?
...eful when extracting info without an aditional step header, *properties = CSV.read(file_path,encoding: 'ISO-8859-1')
– juliangonzalez
Feb 15 '17 at 17:23
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Dump Mongo Collection into JSON format
... The mongoexport utility takes a collection and exports to either JSON or CSV. You can specify a filter for the query, or a list of fields to output
Read more here: http://www.mongodb.org/display/DOCS/mongoexport
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“for line in…” results in UnicodeDecodeError: 'utf-8' codec can't decode byte
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Try this to read using pandas
pd.read_csv('u.item', sep='|', names=m_cols , encoding='latin-1')
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C++静态和多态,亦敌亦友 - C/C++ - 清泛网 - 专注C/C++及内核技术
...因,是在DerivedAgain类中将虚函数声明为static,编译器拒绝此“静态”与“多态”的和平共处。此时理由很简单,static成员函数,是类级共享的,不属于任何对象,也不会传入this指针,不能访问非静态成员;然而,虚函数的要求...
When to Redis? When to MongoDB? [closed]
... SQL-driven relational database: relational databases simplify to indexed CSV files, each file being a table; document stores simplify to indexed JSON files, each file being a document, with multiple files grouped together.
JSON files are similar in structure to XML and YAML files, and to dictiona...
马云、王健林为什么都看中了上海? - 资讯 - 清泛网 - 专注C/C++及内核技术
...财经、蚂蚁金服、宁波云汉的投资,共同打造一家领先的数据服务公司。
今年3月,上海国际电影节、阿里巴巴签署战略合作协议,2015年起签订三年战略合作协议,搭建新人扶持、服务、创新的平台。
今年4月17日,...
Git push error: Unable to unlink old (Permission denied)
... Similarly I've gotten this error when a version controlled CSV file was open in Excel. Simply closing Excel resolved it. This is probably true of other applications too on windows and probably depends upon how the program marks the file as open during editing.
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程序员,你有多久没有跳出技术关注业界了? - 创意 - 清泛网 - 专注C/C++及内核技术
...除了关注语言的发展,还应该关注在PHP的相关技术方面,数据库的、Web服务器的、缓存的、HTTP协议的进步,都应该去了解,了解了之后要想想如何应用到自己的开发实践中,而不是只局限在使用PHP 进行业务开发,整天增删改查...
C++模板-继承-具现化 - C/C++ - 清泛网 - 专注C/C++及内核技术
...,这样按照逻辑,每个继承它的子类都应该独享一份静态数据,也就是独享一份父类,这又怎么实现呢?哈哈,正如上面的模式,让基类是模板类,子类继承是采用子类类型作为模板参数,这样在代码编译时不同的继承类就将父...
std::find,std::find_if使用小结 - C/C++ - 清泛网 - 专注C/C++及内核技术
...。使用该函数,需 #include <algorithm>我们查找一个list中的数据,通常...STL的find,find_if函数提供了一种对数组、STL容器进行查找的方法。使用该函数,需添加
#include <algorithm>
我们查找一个vector中的数据,通常用std::find(),例如:...
