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What does “hashable” mean in Python?

...y and a set member, because these data structures use the hash value internally. All of Python’s immutable built-in objects are hashable, while no mutable containers (such as lists or dictionaries) are. Objects which are instances of user-defined classes are hashable by default; they all comp...
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How do I capture SIGINT in Python?

...f KeyboardInterruptException is implemented as a SIGINT handler or if it really only catches Ctrl+C presses, but either way, using a signal handler makes your intent explicit (at least, if your intent is the same as OP's). More importantly though, with a signal you don't have to wrap try-catches ar...
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What is the difference between a mutable and immutable string in C#?

...pe To "effect a change" on a string represented as a C# String, you actually create a new String object. The original String is not changed ... because it is unchangeable. In most cases it is better to use String because it is easier reason about them; e.g. you don't need to consider the possib...
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Merge cells using EPPlus?

... If you want to merge cells dynamically, you can also use: worksheet.Cells[FromRow, FromColumn, ToRow, ToColumn].Merge = true; All these variables are integers. share | ...
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Erratic hole type resolution

... If you want to generate all possible such values, then you can write a function to do so, either with provided or specified bounds. It may very well be possible to use type-level Church Numerals or some such so as to enforce creation of these, but ...
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How to find out which package version is loaded in R?

... figuring out how to use my university cluster. It has 2 versions of R installed. System wide R 2.11 (Debian 6.0) and R 2.14.2 in non-standard location. ...
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ActionLink htmlAttributes

...can get around that: Use an underscore instead of dash (MVC will automatically replace the underscore with a dash in the emitted HTML): @Html.ActionLink("Edit", "edit", "markets", new { id = 1 }, new {@class="ui-btn-right", data_icon="gear"}) Use the overload that takes in a dictiona...
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Superscript in markdown (Github flavored)?

... @phonetagger: No tags allowed in comments, IIRC. – iconoclast Aug 8 '15 at 14:56 ...
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What are the most common non-BMP Unicode characters in actual use? [closed]

... ‹ › GC=Zs EM SPACE 528576 U+0003BC ‹μ› GC=Ll GREEK SMALL LETTER MU 519669 U+0003B2 ‹β› GC=Ll GREEK SMALL LETTER BETA 512312 U+0003B1 ‹α› GC=Ll GREEK SMALL LETTER ALPHA 491842 U+00200A ‹ › GC=Zs HAIR SPACE 462505 U+0000B0 ‹°› GC=So DE...
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Access multiple elements of list knowing their index

...3, 8, 5, 6]) b = [1, 2, 5] print(list(a[b])) # Result: [1, 5, 5] But really, your current solution is fine. It's probably the neatest out of all of them. share | improve this answer | ...