René's URL Explorer Experiment

Title: The Sentinel Object Pattern

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Links:

Home Page	https://python-patterns.guide/
¶	https://python-patterns.guide/python/sentinel-object/#the-sentinel-object-pattern
The Sentinel Object Pattern	https://python-patterns.guide/python/sentinel-object/#the-sentinel-object-pattern
Sentinel Value	https://python-patterns.guide/python/sentinel-object/#sentinel-value
The Null Pointer Pattern	https://python-patterns.guide/python/sentinel-object/#the-null-pointer-pattern
The Null Object Pattern	https://python-patterns.guide/python/sentinel-object/#the-null-object-pattern
Sentinel Objects	https://python-patterns.guide/python/sentinel-object/#sentinel-objects
¶	https://python-patterns.guide/python/sentinel-object/#sentinel-value
str.find()	https://docs.python.org/3/library/stdtypes.html#str.find
str.index()	https://docs.python.org/3/library/stdtypes.html#str.index
str.find()	https://docs.python.org/3/library/stdtypes.html#str.find
Avoid using null on string-based fields	https://docs.djangoproject.com/en/dev/ref/models/fields/#null
¶	https://python-patterns.guide/python/sentinel-object/#the-null-pointer-pattern
¶	https://python-patterns.guide/python/sentinel-object/#the-null-object-pattern
Refactoring by Martin Fowler	https://python-patterns.guide/fowler-refactoring/
¶	https://python-patterns.guide/python/sentinel-object/#sentinel-objects
Prebound Methods	https://python-patterns.guide/python/prebound-methods/
“Default Parameter Values in Python”	http://effbot.org/zone/default-values.htm
“The Magic Sentinel”	http://www.ianbicking.org/blog/2008/12/the-magic-sentinel.html
“Sentinel values in Python”	https://www.revsys.com/tidbits/sentinel-values-python/
Brandon Rhodes	http://rhodesmill.org/brandon/

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URLs of crawlers that visited me.