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Why does += behave unexpectedly on lists?
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The general answer is that += tries to call the __iadd__ special method, and if that isn't available it tries to use __add__ instead. So the issue is with the difference between these special methods.
The __iadd__ special method is for an in-place addition, that is it mut...
What is a typedef enum in Objective-C?
...mple:
enum tagname x; // declare x of type 'enum tagname'
tagname x; // ERROR in C/Objective-C, OK in C++
In order to avoid having to use the enum keyword everywhere, a typedef can be created:
enum tagname { ... };
typedef enum tagname tagname; // declare 'tagname' as a typedef for 'enum tagn...
Markup XML解析库下载（Markup.h 和 Markup.cpp） - 源码下载 - 清泛网 - 专注C/C++及内核技术
...endif // not MARKUP_WCHAR
#if _MSC_VER < 1000 // not VC++
#define MCD_STRERROR strerror(errno)
#endif // not VC++
// String type and function defines (compiler and build-option dependent)
// Define MARKUP_STL to use STL strings
//
#if defined(MARKUP_STL) // STL
#include <string>
#if defin...
How do I calculate tables size in Oracle
...ave googled it so I'm now aware that I may not have as easy an option as sp_spaceused. Still the potential answers I got are most of the time outdated or don't work. Probably because I'm no DBA on the schema I'm working with.
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Solving “Who owns the Zebra” programmatically?
...all drink different drinks.
# They all smoke different cigarettes.
for vars_ in (colors, nationalities, pets, drinks, cigarettes):
problem.addConstraint(AllDifferentConstraint(), vars_)
# In the middle house they drink milk.
#NOTE: interpret "middle" in a numerical sense (not geometrical)
probl...
What generates the “text file busy” message in Unix?
What operation generates the error "text file busy"? I am unable to tell exactly.
12 Answers
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Sanitizing strings to make them URL and filename safe?
...though.
– Xeoncross
Apr 29 '10 at 3:05
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show 1 more comment
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Max length UITextField
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count(textField.text!) gives an error. You must use textField.text!.characters.count
– Regis St-Gelais
Jul 8 '16 at 13:02
1
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【AI2Claw】正式上线！用自然语言“搭建” App Inventor 界面和代码块！ - ...
...: 给按钮1添加点击事件，点击后显示"你好世界"的提示引用: 分析当前屏幕有哪些组件，各自的功能是什么引用: 我想开通 VIP，怎么购买？
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AI 有时会犯错，重要操作前请先备份项目复杂操作建议分步骤描...
Problem with converting int to string in Linq to entities
...mespace with EF6, the code will compile just fine but will throw a runtime error. I hope this note helps to avoid some confusion.
– Leo
Dec 22 '16 at 15:27
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