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A monad is just a monoid in the category of endofunctors, what's the problem?
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answered Oct 6 '10 at 7:35
Tom CrockettTom Crockett
27.8k55 gold badges6565 silver badges8585 bronze badges
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What is your most productive shortcut with Vim?
...agraph respectively. So, to move a paragraph of text I cut it using { d} (3 keystrokes). (If I happen to already be on the first or last line of the paragraph I can then simply use d} or d{ respectively.
The notion of "paragraph" defaults to something which is usually intuitively reasonable. Thus...
Possible to do a MySQL foreign key to one of two possible tables?
..., you can designate which target table is referenced.
CREATE TABLE popular_places (
user_id INT NOT NULL,
place_id INT NOT NULL,
place_type VARCHAR(10) -- either 'states' or 'countries'
-- foreign key is not possible
);
There's no way to model Polymorphic Associations using SQL constraint...
What characters can be used for up/down triangle (arrow without stem) for display in HTML?
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edited Jul 29 '16 at 20:03
Austin Pray
4,67622 gold badges1919 silver badges3030 bronze badges
answered...
Python base64 data decode
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213
import base64
coded_string = '''Q5YACgA...'''
base64.b64decode(coded_string)
worked for me. At...
What are the real-world strengths and weaknesses of the many frameworks based on backbone.js? [close
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132
+50
Most of ...
What is a correct mime type for docx, pptx etc?
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2523
Here are the correct Microsoft Office MIME types for HTTP content streaming:
Extension MIME Typ...
What is move semantics?
... // Line 2
string c(some_function_returning_a_string()); // Line 3
Now comes the key insight into move semantics. Note that only in the first line where we copy x is this deep copy really necessary, because we might want to inspect x later and would be very surprised if x had changed som...
Socket 错误返回码详解 - C/C++ - 清泛网 - 专注C/C++及内核技术
...etwork is unreachable
WSAETIMEDOUT (10060) Connection timed out
WSAHOST_NOT_FOUND (11001) Host not found
WSASYSNOTREADY (10091) Network sub-system is unavailable
WSANOTINITIALISED (10093) WSAStartup() not performed
WSANO_DATA (11004) Valid name, no data of that type
WSANO_RECOVERY (11003...
AI2 Keep Awake
... Adjustments 1.0 (2024-10-28) Initial Version 1.1 (2024-11-03) Internal adjustments Notice: The lifespan of the device battery will be significantly reduced by using this extension. Do not set WakeLocks if you do not really need them, use them as rarely as possible and rele...