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Android : Check whether the phone is dual SIM

... Update 23 March'15 : Official multiple SIM API is available now from Android 5.1 onwards Other possible option : You can use Java reflection to get both IMEI numbers. Using these IMEI numbers you can check whether the phone is a DUAL SIM or not. Try following activity : import andro...
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Android: Vertical ViewPager [closed]

...horizontal drag you will have to override ViewPager's default touch events and swap the coordinates of MotionEvents prior to handling them, e.g.: /** * Uses a combination of a PageTransformer and swapping X & Y coordinates * of touch events to create the illusion of a vertically scrolling Vie...
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libevent+protobuf轻松搭建tcpserver - C/C++ - 清泛网 - 专注C/C++及内核技术

...轻松搭建tcpserver1. 基础代码 设置某fd为O_NONBLOCK模式 int set_non_block(int fd); server端socket流程:socket(),setsoc...1. 基础代码 // 设置某fd为O_NONBLOCK模式 int set_non_block(int fd); // server端socket流程:socket(),setsockopt(),bind(),listen(),set...
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Adding a new SQL column with a default value

...r down the page: column_definition clauses use the same syntax for ADD and CHANGE as for CREATE TABLE. See Section 12.1.17, “CREATE TABLE Syntax”. And from the linked page: column_definition: data_type [NOT NULL | NULL] [DEFAULT default_value] [AUTO_INCREMENT] [UNIQUE [KEY] | [PRI...
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Why does i = i + i give me 0?

... Could you expand on your answer a bit? – DeaIss Jun 11 '14 at 22:16 17 ...
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How does the Comma Operator work

...itializers for symbol tables. Thus, it makes the following syntax possible and meaningful: keywords = "and", "or", "not", "xor"; Notice that due to operator precedence, the code is (intentionally!) identical to (((keywords = "and"), "or"), "not"), "xor"; That is, the first operator called is k...
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For each row in an R dataframe

... Be careful, as the dataframe is converted to a matrix, and what you end up with (x) is a vector. This is why the above example has to use numeric indexes; the by() approach gives you a data.frame, which makes your code more robust. – D...
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Is it possible to read from a InputStream with a timeout?

...tream always returns 0. This method should be overridden by subclasses. And indeed, the concrete input stream classes do override available(), providing meaningful values, not constant 0s. Second Caveat: Ensure you use carriage-return when typing input in Windows. If using System.in, your progr...
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How to read and write excel file

I want to read and write an Excel file from Java with 3 columns and N rows, printing one string in each cell. Can anyone give me simple code snippet for this? Do I need to use any external lib or does Java have built-in support for it? ...
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编译器内部的秘密--微软的编译器是如何解析Try/Catch/Throw的 - C/C++ - 清...

...是一篇介绍如何在x86架构上详细地实现异常处理(exception handling)的手册,只是一篇入门的讨论性文章。本文只是讨论一些处理步骤在理论上应该如何实现,其具体的实现步骤可能跟文章所讨论的并不一致。原文译自:http://www.codep...