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Pass a variable into a partial, rails 3?
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莱昂氏unix源代码分析 PDF - 文档下载 - 清泛网 - 专注C/C++及内核技术
... UNIX操作系统 209
1.2 公用程序 209
1.3 其他文档 210
1.4 UNIX程序员手册 210
1.5 UNIX文档 211
1.6 UNIX操作系统源代码 211
1.7 源代码中各部分 212
1.8 源代码文件 212
1.9 分析的使用 212
1.10 对程序设计水平的一条注释 212
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Difference between break and continue statement
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edited Oct 24 '14 at 17:59
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Difference between `mod` and `rem` in Haskell
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Rename specific column(s) in pandas
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edited May 23 '17 at 12:34
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answered Nov 3 '13 at 21:32
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What's the difference between lists enclosed by square brackets and parentheses in Python?
... = {}
>>> z[x] = 3
>>> z
{(1, 2): 3}
>>> z[y] = 4
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
TypeError: unhashable type: 'list'
Note that, as many people have pointed out, you can add tuples together. For example:
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