"A book to train programming skills to fight in the world" Python code answer example --1.1 Duplicate character string

"A book to train programming skills to fight in the world" Python code answer example --1.1 Duplicate character string

table of contents

CHAP1. Arrays and strings

  1. Unique string
  2. Count the number of the same characters
  3. URLify
  4. Palindrome permutation
  5. One-shot conversion
  6. String compression
  7. Rotate matrix
  8. Matrix of "0"
  9. Rotate string

Python code answer example

import numpy as np

def isUniqueChars(str):

    if len(str)>128:
        return False

    char_set = np.zeros((128))

    for id in range(len(str)):

        val = ord(str[id])
        if char_set[val] == 1:
            return False
        char_set[val] = 1

    return True

input_str = "sentence"
print(isUniqueChars(input_str))

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