All Questions
4,298
questions
3
votes
3
answers
115
views
Fill or complete a hash in ruby with all sibling keys
I have a rails API where I'm able to query vehicles and count and group by different attributes. I would like to fill the response with zero values when a group by is used.
Here is a simple example:
...
- 569
0
votes
0
answers
52
views
How to avoid deleting backslash in Node.js
I have to verify signature that created by Ruby service. The signature is creating from stringified JSON data.
The problem is that if data contains single backslash in nested strings then Node.js ...
- 15
0
votes
0
answers
148
views
MySQL - How to generate a hashing password with salt in caching_sha2_password format
In MySQL 5.7, I used to create a hashing password in Ruby by
def generate_mysql_password(plaintext_password)
digest = OpenSSL::Digest.new('sha1', OpenSSL::Digest.new('sha1', plaintext_password)....
0
votes
1
answer
53
views
If hash is nil, how to set the key?
I'm storing a book object in a Hash using its title as the key. If the book's already in the hash, I'm calling another method, so I do a check to see if it's in the hash using the key? method. However,...
- 41.2k
1
vote
2
answers
112
views
Why isn't if condition to check if a hash[key] is set to a value of true (boolean) isn't working as expected?
I have the following nested hash called cars
{:honda=>{year=>2008,is_condition_good?=>true},
:toyota=>{year=>2010,is_condition_good?=>false}
}
I want to return the nested hash that ...
- 11
0
votes
1
answer
41
views
Convert string to nested Ruby Hash [] get method
I have a string like '[field1][field2]' that I need to use to access a nested field from a Hash object. Basically, I want to do hash_obj['field1']['field2'].
How can I transform that string to ...
- 1
2
votes
1
answer
146
views
Difference between tap / delete and except in Ruby Hash
I am facing a very curious behavior. This is Ruby 2.6.6, so a block hash variable in a loop isn't frozen. In this example, source is frozen.
Doing this:
result = source.tap { |s| s.delete(:key) }
...
- 5,740
1
vote
3
answers
101
views
Merge n dimensional hashes and sum values in ruby
I'm trying to implement a logic to merge n dimensional hashes in ruby. In case they have identical key I'm looking for a sum of their values
I have a method that on each iteration returns a hash like ...
- 13
0
votes
0
answers
79
views
C++ to Ruby: Equivalent hash of a string as in C++
My C++ code creates a hash of a string using the standard functional library. I would like to port this function to Ruby, but as you can see, I lay my hashing into the strong, mighty hands of the C++ ...
- 368
-2
votes
1
answer
52
views
Insert hash values into another hash in ruby without outer parentesis [duplicate]
I have the following data structure in one of my templates:
[
{
geometry: {
type: geometry, coordinates: coordinates
},
}
]
and then i have an options-hash that looks like this:
...
- 4,580
0
votes
1
answer
48
views
Just started learning Ruby; Why does my code work properly in the Codeacademy environment but not in the Mac Terminal?
Completed a mini project on Hashes & Symbols, and wanted to see how it ran in the terminal.
It executes perfectly in Codeacademy, but in the terminal it's printing out the wrong responses, ...
- 23
1
vote
1
answer
52
views
convert to JSON in Ruby
I have the following lines in a text file and iterate using File.foreach. I want to create a JSON format of these. How do I code that? As I print the hash, the Camaro overwrites Mustang info.
#...
0
votes
1
answer
87
views
Why is HackerRank's Sample Test cases throwing a NoMethodError at the Ruby #tally method in my code?
I've attempted to solve this HackerRank Sparse Arrays problem with Ruby.
I wanted to use #tally on the string_list array in order to create a hash of keys and their occurrence count. I have checked ...
0
votes
1
answer
74
views
Failing to verify existing password hashes with ruby BCrypt
I'm currently running into an issue trying to implement an authentication on Ruby on Rails against an existing database with existing password hashes. I do have a couple of existing plaintext ...
- 2,069
0
votes
2
answers
85
views
Why does && operator not work inside a hash block but and operator does?
Given the following hash
hash = {a: 5, b: 10}
I want to check if all values are Integers and < 10.
hash.all?{|key,value| value.is_a? Integer && value < 10} ## TypeError: class or module ...
- 638