如何检查字符串是否包含数组中的某些单词？

Question

Suppose I have two array:

const rejectBill = ['cancel', 'delete', 'discard', 'erroneously']

const readBill = ['bill','account','amount']

And I have an string,

const stringBill = 'Read bill from text to be cancelled'

I want to check if bill contains words from readBill then return true but if it also contains word from rejectBill then return false.

For this I tried:

let stringSatus = readBill.some(keyword => stringBill.toLowerCase().includes(keyword.toLowerCase())) && 
                   !rejectBill.some(keyword => stringBill.toLowerCase().includes(keyword.toLowerCase()))

But on console of stringSatus, it gives false.

I want stringStatus to be true when string contains words from readBill array doesnot contain word from rejectBill array and false when string contains word from rejectBill.

If any one needs any more information please let me know.

Answer 1

Using Regex

I have created a regex on the fly based on the string[] and test if the string passes the regex .

 const rejectBill = ['cancel', 'delete', 'discard', 'erroneously']; const readBill = ['bill', 'account', 'amount']; const stringBill = 'Read bill from text to be cancelled'; var rejectBillRegex = new RegExp(rejectBill.map(t => `\\b${t}\\b`).join('|'), 'i'), readBillRegex = new RegExp(readBill.map(t => `\\b${t}\\b`).join('|'), 'i'); var stringSatus = readBillRegex.test(stringBill) &&.rejectBillRegex;test(stringBill). console.log(stringSatus)

Answer 2

Using String#split and Set .

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You can split the string by spaces using String#split and then using a Set constructed out of the list check if splited array contains any (using Array#some ) string that is present in the Set .

NOTE: It is currently case sensitive, you can use toLowerCase() or toUpperCase() to make it case insensitive.

 const rejectBill = ["cancel", "delete", "discard", "erroneously"], readBill = ["bill", "account", "amount"], stringBill = "Read bill from text to be cancelled", strInList = (str, lst, set = new Set(lst)) => str.split(" ").some((s) => set.has(s)), isRead = strInList(stringBill, readBill) &&,strInList(stringBill; rejectBill). console;log(isRead);

Answer 3

From taking a quick look at your code, it seems like it does work as attended. Your example, "Read bill from text to be cancelled," is returning false because it detects the word "'cancel'led." If you were to remove 'cancel' from 'cancelled,' it would return true. If you are looking to check for spaces, I would add a space after each value in readBill and rejectBill, as so:

const rejectBill = ['cancel ', 'delete ', 'discard ', 'erroneously '];
const readBill = ['bill ', 'account ', 'amount '];

You would also need to add a fail-safe though for when stringBill ends in one of those words. That could easily be implemented by checking the last word of the string, stringBill. If you have any questions, feel free to leave a comment and I will help you out to the best of my ability!