Determine if hash contains any key from a set of keys?
124040
Testing if a hash has any of a number of keys
99162
Ruby Style: How to check whether a nested hash element exists
87887
Why can a Python dict have multiple keys with the same hash?
104353
HashMap Search for part of an key?
38109
Making hashes find each other by their values using Ruby
7221
How does a hash table work?
103001
How to do associative array/hashing in JavaScript
96246
What's quicker and better to determine if an array key exists in PHP?
6320
How to determine if a string contains any matches of a list of strings
43028
How can I combine hashes in Perl?
139521
Validating that a hash is over a specific value for two hashes with additional (known but different) input
89099
Accessing a Ruby hash with a variable as the key
721
Check if a Bash array contains a value
17641
How do I sort an array of hashes by a value in the hash?
102766
Hashing a Tree Structure
83963
Proving knowledge of a preimage of a hash without disclosing it?
10138
How to avoid NoMethodError for missing elements in nested hashes, without repeated nil checks?