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Why do you have to call .items() when iterating over a dictionary in Python?
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Alex MartelliAlex Martelli
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Difference between . and : in Lua
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242
The colon is for implementing methods that pass self as the first parameter. So x:bar(3,4)shou...
What is a plain English explanation of “Big O” notation?
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41 Answers
41
Active
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Why would finding a type's initializer throw a NullReferenceException?
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with csc test.cs:
(196c.1874): Access violation - code c0000005 (first chance)
mscorlib_ni!System.RuntimeType.GetConstructorImpl(System.Reflection.BindingFlags, System.Reflection.Binder, System.Reflection.CallingConventions, System.Type[], System.Refle...
Iterating each character in a string using Python
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452
As Johannes pointed out,
for c in "string":
#do something with c
You can iterate prett...
Unsupported major.minor version 52.0 [duplicate]
...rsion mismatch. Referring to the Wikipedia Java Class Reference:
Java SE 14 = 58
Java SE 13 = 57
Java SE 12 = 56 (0x38 hex)
Java SE 11 = 55 (0x37 hex)
Java SE 10 = 54
Java SE 9 = 53
Java SE 8 = 52
Java SE 7 = 51
Java SE 6.0 = 50
Java SE 5.0 = 49
JDK 1.4 = 48
JDK 1.3 = 47
JDK 1.2 = 46
JDK 1.1 = 45
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使用std::string作为std::map的key出错解决 - C/C++ - 清泛网 - 专注C/C++及内核技术
...0\vc\include\xstddef(180): error C2784: “bool std::operator <(const std::_Tree<_Traits> &,const std::_Tree<_Traits> &)”: 未能从“const std::string”为“const std::_Tree<_Traits> &”推导 模板 参数
1> c:\program files (x86)\microsoft visual studio 11.0\vc\include\xtree(2245...
Javascript - Open a given URL in a new tab by clicking a button
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146
Use this:
<input type="button" value="button name" onclick="window.open('http://www.website...
Adding a new value to an existing ENUM Type
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alter table some_table rename column some_column to _some_column;
-- 4. add new column of new type
alter table some_table add some_column some_enum_type not null default 'new';
-- 5. copy values to the new column
update some_table set some_column = _some_column::text::some_enum_type;
-- 6. rem...