Mapping Examples

#Map to add 1 to each value in a list
ls = [34, 6, 8, 2, 1, 5]
lst =['bobbby     ', '     tim','  Susan  ']
list(map(lambda x: x + 1, ls))

#Map to make all numbers in a list positive
list(map(lambda x: abs(x), ls))

#or
list(map(lambda x: -x if x < 0 else x, ls))

#Map to remove whitespace from all strings in a list
list(map(lambda x: x.strip(),lst))

#Map to transform a dictionary into Key-Value pairs
d = {4:'Frank', 9:'Ada', 32:'Sue'}
list(map(lambda k: (k, d[k]), d))

#Reduce function
def mycount(i):
    count = 0
    for x in i:
        count += 1
    return count
#mycount(range(4))