I was just going through one of DavidHayden’s articles on Hashing User Passwords. Really I can’t get what he is trying to achieve. Here is his code: private static string CreateSalt(int size) { //Generate a cryptographic random number. RNGCryptoServiceProvider rng = new RNGCryptoServiceProvider(); byte[] buff = new byte[size]; rng.GetBytes(buff); // Return a Base64 string representation … Read more
I want to change every value in a hash so as to add ‘%’ before and after the value so { :a=>’a’ , :b=>’b’ } must be changed to { :a=>’%a%’ , :b=>’%b%’ } What’s the best way to do this? 11 Answers 11
For caching purposes I need to generate a cache key from GET arguments which are present in a dict. Currently I’m using sha1(repr(sorted(my_dict.items()))) (sha1() is a convenience method that uses hashlib internally) but I’m curious if there’s a better way. 15 Answers 15
I’m new to Ruby and don’t know how to add new item to already existing hash. For example, first I construct hash: hash = {item1: 1} after that a want to add item2 so after this I have hash like this: {item1: 1, item2: 2} I don’t know what method to do on hash, could … Read more
I’m essentially preparing phrases to be put into the database, they may be malformed so I want to store a short hash of them instead (I will be simply comparing if they exist or not, so hash is ideal). I assume MD5 is fairly slow on 100,000+ requests so I wanted to know what would … Read more
What would actually happen if I had a hash collision while using git? E.g. I manage to commit two files with the same sha1 checksum, would git notice it or corrupt one of the files? Could git be improved to live with that, or would I have to change to a new hash algorithm? (Please … Read more
I want to get a specific output iterating a Ruby Hash. This is the Hash I want to iterate over: hash = { 1 => [‘a’, ‘b’], 2 => [‘c’], 3 => [‘d’, ‘e’, ‘f’, ‘g’], 4 => [‘h’] } This is the output I would like to get: 1—– a b 2—– c 3—– … Read more
I want to create a hash of I love cupcakes (signed with the key abcdeg) How can I create that hash, using Node.js Crypto? 4 Answers 4
I have a condition where, I get a hash hash = {“_id”=>”4de7140772f8be03da000018”, …..} and I want this hash as hash = {“id”=>”4de7140772f8be03da000018″, ……} P.S: I don’t know what are the keys in the hash, they are random which comes with an “_” prefix for every key and I want no underscores 12 Answers 12
As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for … Read more
