ruby – Page 4 – Tarik Billa

Rails Previous Sunday in Relation to Any DateTime

April 8, 2024 by Tarik

Rails has a convenience method for calculating the beginning of the week. irb(main):001:0> Date.today.beginning_of_week(:sunday) #=> Sun, 16 Dec 2012 See the Date Rails extensions for other possibilities: http://api.rubyonrails.org/classes/Date.html Update: Rails 5.2 adds convenience methods to find the next/previous occurrence of a day. [1] pry(main)> Date.today.prev_occurring(:sunday) #=> Sun, 29 Apr 2018 See the DateAndTime::Calculations documentation for … Read more

Get response headers from Ruby HTTP request

April 8, 2024 by Tarik

The response object actually contains the headers. See “Net::HTTPResponse” for more infomation. You can do: response[‘Cache-Control’] You can also call each_header or each on the response object to iterate through the headers. If you really want the headers outside of the response object, call response.to_hash

How to find records that have duplicate data using Active Record

April 8, 2024 by Tarik

Translating @TuteC into ActiveRecord: sql=”SELECT id, COUNT(id) as quantity FROM types GROUP BY name HAVING quantity > 1″ #=> Type.select(“id, count(id) as quantity”) .group(:name) .having(“quantity > 1”)

How do I stub a method to raise an error using Ruby MiniTest?

April 5, 2024 by Tarik

require “minitest/autorun” class MyModel def my_method; end end class TestRaiseException < MiniTest::Unit::TestCase def test_raise_exception model = MyModel.new raises_exception = -> { raise ArgumentError.new } model.stub :my_method, raises_exception do assert_raises(ArgumentError) { model.my_method } end end end

In Ruby how do I find the index of one of an array of elements?

April 4, 2024 by Tarik

You can use find_index and pass the needed value from the array: a = [“a”, “b”, “c”] p a.find_index(‘a’) p a.find_index(‘b’) p a.find_index(‘c’) # => 0 # => 1 # => 2 You can use map to get every element inside your a array and then to get the index corresponding to each element: p … Read more

Error installing cocoapods: drb requires Ruby version >= 2.7.0. The current ruby version is 2.6.10.210

April 3, 2024 by Tarik

if you are using macOS, How about using homebrew than gem? I had exactly same problem, so I tried to install it using homebrew brew install cocoapods My problem was clearly resolved!

ld: library not found for -lzstd while bundle install for mysql2 gem Ruby on macOS Big Sur 11.4 Apple M1

March 31, 2024 by Tarik

Step 1: confirm you have both openssl and MySQL installed via brew brew install mysql brew install openssl or if you have previous version of openssl try brew reinstall openssl@3 Step 2: Run this on your Rails app to make sure you can get through bundler: gem install mysql2 -v ‘0.5.3’ — –with-opt-dir=$(brew –prefix openssl) … Read more

Installing Ruby gems not working with Homebrew

March 28, 2024 by Tarik

Homebrew is nice. However unlike brew and npm, gem does not make aliases in /usr/local/bin automatically. Solution I went for a very simple approach (as of March 2020): # Based on “`brew –prefix ruby`/bin” export PATH=/usr/local/opt/ruby/bin:$PATH # Based on “`gem environment gemdir`/bin” export PATH=/usr/local/lib/ruby/gems/3.0.0/bin:$PATH Add this to your .bashrc (or .bash_profile, .zshrc, etc.). That’s it! … Read more

Rubocop Layout/LineLength: How to ignore lines with comments?

February 27, 2024 by Tarik

There is a way to ignore cops on a per line basis. There is also a way to do it via configuration file. Run rubocop –auto-gen-config and it will generate a file that you can use to disable the offenses. The command also gives a hint on what to do to load those options. On … Read more

Rounding float in Ruby

February 12, 2024 by Tarik

Pass an argument to round containing the number of decimal places to round to >> 2.3465.round => 2 >> 2.3465.round(2) => 2.35 >> 2.3465.round(3) => 2.347