I need the index of an array in a multidimensional array if it contains a unique string.
array:
[
{:id=>5, :name=>"Leaf Green", :hex_value=>"047115"},
{:id=>15, :name=>"Lemon Yellow", :hex_value=>"FFF600"},
{:id=>16, :name=>"Navy", :hex_value=>"285974"}
]
If hex_value of 'FFF600' exists, return the arrays position, which in this case would be 1.
This is where I am at, but it's returning [].
index = array.each_index.select{|i| array[i] == '#FFF600'}
That's returning nil, because there's no element i (index) in the array with value #FFF600 (nor FFF600), you need to access to the hex_value key value:
p [
{:id=>5, :name=>"Leaf Green", :hex_value=>"047115"},
{:id=>15, :name=>"Lemon Yellow", :hex_value=>"FFF600"},
{:id=>16, :name=>"Navy", :hex_value=>"285974"}
].yield_self { |this| this.each_index.select { |index| this[index][:hex_value] == 'FFF600' } }
# [1]
Giving you [1], because of using select, if you want just the first occurrence, you can use find instead.
I'm using yield_self there, to avoid assigning the array to a variable. Which is equivalent to:
array = [
{:id=>5, :name=>"Leaf Green", :hex_value=>"047115"},
{:id=>15, :name=>"Lemon Yellow", :hex_value=>"FFF600"},
{:id=>16, :name=>"Navy", :hex_value=>"285974"}
]
p array.each_index.select { |index| array[index][:hex_value] == 'FFF600' }
# [1]
Being Ruby, you can use the method for that: Enumerable#find_index
p [
{:id=>5, :name=>"Leaf Green", :hex_value=>"047115"},
{:id=>15, :name=>"Lemon Yellow", :hex_value=>"FFF600"},
{:id=>16, :name=>"Navy", :hex_value=>"285974"}
].find_index { |hash| hash[:hex_value] == 'FFF600' }
# 1
