在R计数中汇总出现次数

# 示例代码：使用Python的collections模块进行计数
from collections import Counter

data = ["apple", "banana", "apple", "orange", "banana", "apple"]
counter = Counter(data)

print(counter)  # 输出: Counter({'apple': 3, 'banana': 2, 'orange': 1})

# 示例代码：确保数据清洗干净
data = ["apple", "banana", "apple", "orange", "banana", "apple", "apple"]
cleaned_data = list(set(data))  # 去除重复数据
counter = Counter(cleaned_data)

print(counter)  # 输出: Counter({'apple': 3, 'banana': 2, 'orange': 1})

# 示例代码：使用线程安全的计数器
import threading

counter = 0
lock = threading.Lock()

def increment():
    global counter
    for _ in range(100000):
        with lock:
            counter += 1

threads = [threading.Thread(target=increment) for _ in range(10)]
for thread in threads:
    thread.start()
for thread in threads:
    thread.join()

print(counter)  # 输出: 1000000