Compare values of tables

Solar2D Lua Language
#1

Basically, I’m trying to compare the value of a table with another table and get the result. 

local alphabet = {"A","B","C","D","E","F","G"} local letters = {"A","C", "F"} local newLetters = {} for i=1,#letters do if letters[i] == alphabet[i] then newLetters[#newLetters +1] = alphabet[i] table.remove(letters, i) end end return newLetters

This only returns “A”. What’s wrong with this code?

#2

Your code assumes that the index of letters and alphabet refer to the same values. You need a second for loop.

for i=1,#letters do for j = 1, #alphabet do if letters[i] == alphabet[j] then newLetters[#newLetters +1] = alphabet[j] -- table.remove(letters, i) -- you don't need to do this. end end end

The code is untested but something like this should work.

Rob

#3

Your code assumes that the index of letters and alphabet refer to the same values. You need a second for loop.

for i=1,#letters do for j = 1, #alphabet do if letters[i] == alphabet[j] then newLetters[#newLetters +1] = alphabet[j] -- table.remove(letters, i) -- you don't need to do this. end end end

The code is untested but something like this should work.

Rob