使用如下语句读取名为0_xx.txt 文件时,遇到错误 ValueError: embedded null character if __name__ == '__main__': fr = open("F:\eclipse_workspace\machine_learning_example\Ch02\trainningDigits\0_38.txt") for i in range(32): lineStr = fr.readline() lineStr = lineStr.st…
在C/C++中,字符串以'\0'结尾是一种强制要求,或者说,只有满足这个要求的 字符数组才能被称为字符串.否则,你所做的所有操作结果都是未定义的! C标准库string.h中所有关于字符串的函数都有一个特性,对于输入字符串,默认为是以'\0'结尾的 ,否则就会出现未定义行为,比如strlen,实现就依赖了这一点: int len = 0; while(*s++)len++;对于输出字符串(一把是返回一个char*指针),也保证在末尾加上一个'\0' 本来,如果把字符串完全当成整体(像std::s…
About SQLite See Also... Features When to use SQLite Frequently Asked Questions Well-known Users Books About SQLite Getting Started SQL Syntax Pragmas SQL functions Date & time functions Aggregate functions C/C++ Interface Spec Introduction List of C…
Microsoft Win32 to Microsoft .NET Framework API Map .NET Development (General) Technical Articles Microsoft .NET Framework and Microsoft Visual Studio User Education TeamsMicrosoft Corporation January 2004 Applies to: Microsoft® .NET Framework…
using System; using System.Collections.Specialized; using System.Drawing; using System.Drawing.Imaging; using System.IO; using System.Runtime.InteropServices; using System.Text; using System.Windows.Forms; namespace RichTextBoxEx.Controls { #regi…
转:http://my.oschina.net/1pei/blog/479162 PNG格式:每个PNG文件是由一个PNG标识(signature),后面跟一些数据块(chunk),每个chunk由 一个chunk类型来标识其功能. 摘要 本文解决了Android Studio 1.2.2下编译期间出现的libpng warning: iCCP: Not recognizing known sRGB profile that has been edited警告问题. 目录[-] 1. 问题描述…
MongoDB stores data records as BSON documents. BSON is a binary representation of JSON documents, though it contains more data types than JSON. For the BSON spec, see bsonspec.org. See also BSON Types. Document Structure MongoDB documents are compose…
http://docs.oracle.com/javase/tutorial/essential/regex/index.html This lesson explains how to use the java.util.regex API for pattern matching with regular expressions. Although the syntax accepted by this package is similar to the Perl programming l…
MongoDB is very powerful, but it is still easy to get started with. In this chapter we’ll introduce some of the basic concepts of MongoDB: • A document is the basic unit of data for MongoDB, roughly equivalent to a row in a relational database manage…
FormatMessage Formats a message string. The function requires a message definition as input. The message definition can come from a buffer passed into the function. It can come from a message table resource in an already-loaded module. Or the caller…
4.4.7. The CONSTANT_Utf8_info Structure The CONSTANT_Utf8_info structure is used to represent constant string values: 代表常量字符串. The items of the CONSTANT_Utf8_info structure are as follows: 条目如下: tag The tag item of the CONSTANT_Utf8_info structure ha…
项目主页:http://grinninglizard.com/tinyxml2docs/index.html tinyxml2.h /* Original code by Lee Thomason (www.grinninglizard.com) This software is provided 'as-is', without any express or implied warranty. In no event will the authors be held liable for an…
https://docs.microsoft.com/en-us/cpp/cpp/string-and-character-literals-cpp?view=vs-2017 C++ supports various string and character types, and provides ways to express literal values of each of these types. In your source code, you express the content…
odoo12启动过程中遇到的问题,及解决办法:1.ImportError: No module named ‘win32service’pipenv install pypiwin32 2.ImportError: No module named ‘PIL’pipenv install Pillow 3. No module named 'ForkingMixIn' 将Werkzeug升级到0.11.15 pipenv install Werkzeug==0.11.15 4. ModuleNot…
BSTR A BSTR (Basic string or binary string) is a string data type that is used by COM, Automation, and Interop functions. Use the BSTR data type in all interfaces that will be accessed from script. C++ typedef WCHAR OLECHAR; typedef OLECHAR* BSTR;…
Chapter 4. The class File Format Table of Contents 4.1. The ClassFile Structure 4.2. Names 4.2.1. Binary Class and Interface Names 4.2.2. Unqualified Names 4.2.3. Module and Package Names 4.3. Descriptors 4.3.1. Grammar Notation 4.3.2. Field Descript…
