Haystack Exercise

haystack.py

haystack = "javascript"
needle1 = "jvs"
needle2 = "jts"
needle3 = "jvt"

def func(word, partial):
    isFound = True

    for char in haystack:
        if not partial:
            break
        if partial[0] == char:
            partial = partial[1:]

    if partial:
        isFound = False

    return isFound


assert func(haystack, needle1) == True
assert func(haystack, needle2) == False
assert func(haystack, needle3) == True