Module: Utilities::Hashes

Defined in:
lib/utilities/hashes.rb

Class Method Summary collapse

Class Method Details

.delete_keys(hsh, array) ⇒ Hash

Delete all matching keys in array from the hsh

Parameters:

  • hsh (Hash)
  • array (Array)

Returns:

  • (Hash) 


20
21
22
 
# File 'lib/utilities/hashes.rb', line 20

def self.delete_keys(hsh, array)
  hsh.delete_if{|k,v| array.include?(k)}
end

.delete_nil_and_empty_hash_values(hsh) ⇒ Hash

Delete all nil and empty hashes values

Parameters:

  • hsh (Hash)

Returns:

  • (Hash) 


44
45
46
47
48
49
 
# File 'lib/utilities/hashes.rb', line 44

def self.delete_nil_and_empty_hash_values(hsh)
  hsh.each do |key, value|
    hsh.delete(key) if hsh[key].nil? || hsh[key] == {}
  end
  hsh
end

.puts_collisions(a, b) ⇒ Object

Pass two hashes, a and b, print out those situations in which a.merge(b) would change a value assigned in a to something different (assigned in b)

Parameters:

  • a (Hash)
  • b (Hash) 


8
9
10
11
12
13
14
 
# File 'lib/utilities/hashes.rb', line 8

def self.puts_collisions(a, b)
  a.each do |i,j|
    if b[i] && !j.blank? && b[i] != j
      puts "#{i}: [#{j}] != [#{b[i]}]"
    end
  end
end

.set_unless_nil(hsh, key, value) ⇒ Object

Sets value at key in hsh iff value is not nil

Parameters:

  • hsh (Hash)
  • key (Object)
  • value (Object) 


37
38
39
 
# File 'lib/utilities/hashes.rb', line 37

def self.set_unless_nil(hsh, key, value)
  hsh[key] = value unless value.nil?
end

.symbolize_keys(hash) ⇒ Hash

Parameters:

  • hash (Hash)

Returns:

  • (Hash) 


26
27
28
29
30
31
 
# File 'lib/utilities/hashes.rb', line 26

def self.symbolize_keys(hash)
  hash.inject({}) do |h, (k, v)|
    h[k.is_a?(String) ? k.to_sym : k] = (v.is_a?(Hash) ? symbolize_keys(v) : v)
    h
  end
end