Check if partial value is inside array

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I have this array :

>> arr = [["a",1,"b"],["a",2,"b"],["b",3,"d"],["t",6,"a"]]

I want to check if ["a",1] exists inside the arr while ignoring the 3rd value of the arr items.

Is there a better way then first removing the 3rd value from each item in arr:

>> new_arr = [["a",1],["a",2],["b",3],["t",6]]

and then doing

>> new_arr.include? ["a",1]
true

Something like:

arr.include? ["a",1,/*/]  #the 3rd value can be anything

Thanks.

asked 44 secs ago

MichaelR

176

Check if partial value is inside array