#----------------------------------------------------------------------
# Introduction to Dictionaries
#
# Copyright (C) November 1, 2017 -- Dr. William T. Verts
#----------------------------------------------------------------------

#----------------------------------------------------------------------
# Using lists, we can represent Morse codes as a list containing a
# whole bunch of two-element lists: [letter,code] where letter is a
# one-character string, and code is the equivalent Morse code string
# of dots and dashes.  To map a letter onto a code, we need a function
# to search the list.
#----------------------------------------------------------------------

Morse = [["A",".-"], ["H","...."], ["I",".."], ["O", "---"], ["T","-"], ["V","...-"]]

def CharToMorse(C):
    for L in Morse:
        if (L[0] == C):
            return L[1]
    return ""

print CharToMorse("A")
print CharToMorse("V")

#----------------------------------------------------------------------
# With dictionaries, we create a bunch of key:value pairs, but then
# we ask for a mapping of letter to code directly without a search
# function.
#----------------------------------------------------------------------
    
DMorse = {"A":".-", "H":"....", "I":"..", "O":"---", "T":"-", "V":"...-"}

print DMorse["A"]
print DMorse["V"]