Hashes: testing a key
62057
How can I make hash key lookup case-insensitive?
9213
Attacks of the MAC construction $\mathcal{H}(m\mathbin\|k)$ for common hashes $\mathcal{H}$?
128726
MySQL Hashing Function Implementation
15235
Check if a given key already exists in a dictionary
41777
Hash functions to generate a one-time pad
9502
How can you check for a #hash in a URL using JavaScript?
43473
Turning a cipher into a hashing function
104353
HashMap Search for part of an key?
13934
Is there any difference between the `:key => "value"` and `key: "value"` hash notations?
53294
Why can't we reverse hashes?
5931
Why can't I reverse a hash to a possible input?
105045
Ruby - Access multidimensional hash and avoid access nil object
156847
For a login application, how would i go about checking the sha1 value of a password?
117472
Combining secure hashes with insecure hashes?
86584
Do parts of a hash carry the properties of the entire hash?
87552
How to test if a string is basically an integer in quotes using Ruby
138427
What decodes my encoded hash symbol(%23)?