Home PHP C# C++ Android Java Javascript Python IOS SQL HTML Categories

How does Ruby's #count method deal with nil values?

You can write def my_count(*args) and check then length of args. I'd write:

module Enumerable
  def my_count(*args)
    when args.size > 1
      raise ArgumentError
    when args.size == 1
      value = args.first
      reduce(0) { |acc, x| value == x ? acc + 1 :
acc }
    when block_given?
      reduce(0) { |acc, x| yield(x) ? acc + 1 :
acc }
      reduce(0) { |acc, x| acc + 1 }

Categories : Ruby

Related to : How does Ruby's #count method deal with nil values?
python: count values of dictionary
Not sure if this is what you're looking for? def getcountvalue(d): newdict = {} for key, value in d.items(): newdict[key] = len(value) return newdict d = {2: [(1, 1)], 3: [(2, 1), (2, 1)], 4: [(1, 3), (3, 1), (3, 1)], 5: [(1, 4), (2, 3), (2, 3), (4, 1)], 6: [(1, 5), (2, 4), (2, 4), (3, 3), (3, 3)], 7: [(1, 6), (2, 5), (2, 5), (3, 4), (3, 4), (4, 3)], 8: [(2, 6), (2, 6), (3, 5

Categories : Misc
How to count the numbers in values in a dictionary
Edited Answer amount_of_numbers = {} for key, value in some_dictionary.items(): amount_of_numbers[key] = len ([string for string in value if all(char.isdigit() for char in string) ]) print amount_of_numbers {'SECOND': 1, 'THIRD': 2, 'FIRST': 2} Original Answer Here you go: some_dictionary = {'FIRST' : ['a', '1', 'b', '2'], 'SECOND' : ['c', 'd', '3', 'e'],

Categories : Python
Mockery not being able to count method calls on a Facade
Finally found a solution. Instead of using the File, facade, I did inject the FileSystem depency through the constructor, and Mocked that on unit test, and passed the mocked object into IoC Container, and only that way worked, otherwise on Laravel 5, Mocking Facades is not working, shouldReceive() is not keeping count as we've been told by Laravel Docs. Kind Regards

Categories : Testing
SQL count column and list values counted
I think the GROUP_CONCAT function is what you are looking for. So for your example, try: SELECT COUNT(DISTINCT users) AS ctUsers, checkout, GROUP_CONCAT(DISTINCT users) FROM license_granted GROUP BY checkout You can also define a custom separator for the GROUP_CONCAT values by adding a SEPARATOR clause inside the GROUP_CONCAT query, ie. GROUP_CONCAT(DISTINCT users SEPARATOR ' '

Categories : SQL
Count how many percent of values on each column are nulls
Think there is not built-in features for this. You can make this self Just walk thorough each column in table and calc count() for all rows and count() for rows where column is null. There is possible and optimize this for one query for one table.

Categories : SQL
Recently Add
Parsing through nested hash using .present? - undefined method `[]' for nil:NilClass (NoMethodError)
"params" doesn't work in Ruby (Sinatra framework)
Specifying a Puppet + Ruby version matrix in CircleCI
How to upload a file using RestClient in Ruby?
Shibboleth authentication in Rails
Random, intermittent "argument out of range" error while parsing CSV and parsing time
Ruby: Wrong number of Arguments for a subclass changes number of arguments
amalgamate two ruby arrays
Geocoder request.location returns nil
Access most recent table row and its data
how to search multiple word in the same file using ruby and the get the output which contains those words
MongoDB search query for stats
rake command parsing options after --
Ruby: cannot load such file - LoadError
Understanding attributes in AWS DynamoDB with Ruby
Ruby: Get last character from user input
Undefined method 'delegate' for capybara::dsl::module
neo4j ruby wrapper create or update
'on raise' hook in ruby
Ruby OCI8 - bind optional parameters to Oracle Stored procedure
How to install the app only once for the suite
Different test unit output in Rubymine and console
Can Rake run each test in a separate Ruby instance?
Ruby strftime in UK format i.e. dd/mm/yy
Accessing hash in Ruby like objects in Coffeescript
How do I correct my script, that it doesn't matter what file name has the .xml that is uploaded?
Ruby: Tests not runing
Do I have to install Ruby on my Apache server to run scripts
Ruby: Does Test::Unit still exist?
How do I make a form that changes color with input text in Ruby?
© Copyright 2017 Publishing Limited. All rights reserved.