[英]Count occurrences of array in string
我是编程的新手,已经尽我所能进行研究/阅读,但是还没有找到具体的答案来帮助我。
我的问题如下,如果我有一个包含多个单词的数组,如下所示:myArray =“ this”,“ makes”,“ bats”,“ look”,“ funny”
而且我有一串乱七八糟的单词(包括数组中列出的单词的一些实例,例如:string =“ jkmakespohbatsllfunnythisqwemakes”
字符串包含单词“ makes”的两个实例,一个“ bats”的实例,一个“ funny”的实例,一个“ this”的实例和零个“ look”的实例。
有人可以用一些伪代码帮助我指出正确的方向,该伪代码说明我如何在字符串中搜索数组中的任何子字符串单词,并打印找到的每个实例(如上所述)或未找到的实例的计数。
我现在在编程语言上有所不同,但是当我对结构有了更好的了解时,可能会希望以后再编写代码。
谢谢!
# define a list of your words (call it 'words')
# define the string you want to search through (call it 'jumble')
# Define an empty dictionary that will hold your results. You can use a regular
# dictionary, or a cool thing in Python called "DefaultDict", in the collections module.
# Call it 'count'.
# Now loop through each of your words
# Start searching at the beginning of your jumble, by
# specifying a start position of 0. (This will make sense later.)
# Add another loop here, that keeps looping until we're sure there's no
# more words to be found.
# Try to find (hint: check out the 'string' module) the word inside of jumble.
# If we did NOT find a word
# We just 'break' out of the inner loop
# Else If we DID find a word, let's save the position of that word.
# Call that 'index'.
# If this is the first time, we put the word in our dictionary
# with a count of 1
# Else If this is not the first time, add 1 to the dictionary entry
# for that word.
# Now we search AGAIN through the jumble, but start AFTER the
# position where we saw the first time.
# Now we've exited the entire thing, let's just print out our 'count' dictionary.
那是伪代码。
这是您可能要使用的各种功能的一些示例:
colors = ['red', 'blue', 'green'] # Lists
for color in colors: # For loops
print(color)
person = {} # Empty dictionary
person['name'] = 'Symmitchry' # Add a key / value pair to a dictionary
if 'name' in person: # Looking for a key in a dictionary
print('Person has a name:') # How to print
print(person['name']) # How to access a value from a dictionary
else: # how to write an else statement
print('Person has no name! Weird.')
import random # importing a module
x = random.randint() # Using a function from a module
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