Caching, when nil or false are acceptable results
129148
How can I memoize a method that may return true, false, or nil in Ruby?
29292
Can I safely remove /var/cache?
61839
Prevent browser caching of AJAX call result
83110
JOIN versus EXISTS performance
14753
How to avoid NoMethodError for nil elements when accessing nested hashes?
39138
Is this idiom pythonic? (someBool and "True Result" or "False Result")
38052
How Do I Fully Flush Cached Redirects From Safari?
38565
Force browser to clear cache
105045
Ruby - Access multidimensional hash and avoid access nil object
143760
Non-volatile cache RAID controllers: what kind of protection is there against NVCACHE failure?
147359
Can I retrieve a re-hashed (hash) value, for instance by additional hashing?
48494
In Ruby why does nil.id return 4?
12323
iPhone : Difference between nil vs Nil and true vs TRUE
133619
In Objective-C why should I check if self = [super init] is not nil?
49332
how to clear or replace a cached image
130136
What determines the quality of loot in horadric caches?
50029
Is it safe to use file's hash as IV?