Either use location or window.location instead of document.location as the latter is a non-standard. window.location.hash=”#food”; This will replace the URL’s hash with the value you set for it. Reference
You may use a.reduce Hash.new, :merge which directly yields {:a=>:b, :c=>:d} Note that in case of collisions the order is important. Latter hashes override previous mappings, see e.g.: [{a: :b}, {c: :d}, {e: :f, a: :g}].reduce Hash.new, :merge # {:a=>:g, :c=>:d, :e=>:f}
If your html form has input fields with empty square brackets, then they will be turned into an array inside params in the controller. # Eg multiple input fields all with the same name: <input type=”textbox” name=”course[track_codes][]” …> # will become the Array params[“course”][“track_codes”] # with an element for each of the input fields with … Read more
The main difference is conceptual: while hashes are used to guarantee the integrity of data, a MAC guarantees integrity AND authentication. This means that a hashcode is blindly generated from the message without any kind of external input: what you obtain is something that can be used to check if the message got any alteration … Read more
simply call stringify_keys (or stringify_keys!) http://apidock.com/rails/Hash/stringify_keys
In cases where I have a key for each element and I don’t know the index of the element into an array, hashtables perform better than arrays (O(1) vs O(n)). The hash table search performs O(1) in the average case. In the worst case, the hash table search performs O(n): when you have collisions and … Read more
As the name implies, it’s 512 bits, that is 64 bytes. But that’s the hash, maybe you’re wondering about a specific representation of that hash in string, as is commonly used, then it depends of the given representation. If you write the hash in hexa, then it will be 128 characters. If you write the … Read more
The function object std::hash<> is used. Standard specializations exist for all built-in types, and some other standard library types such as std::string and std::thread. See the link for the full list. For other types to be used in a std::unordered_map, you will have to specialize std::hash<> or create your own function object. The chance of … Read more
If you want to delete or flush the ‘myhash’ hash. Please use the command below: redis-cli redis> del myhash Hope it will solve the problem.
Structs differ from using hashmaps in the following ways (in addition to how the code looks): A struct has a fixed set of attributes, while you add new keys to a hash. Calling an attribute that does not exist on an instance of a struct will cause a NoMethodError, while getting the value for a … Read more