CODEWITHSUNDEEP
javascriptmethods
okky
okky

Reputation: 167

How to check if one or more strings contained in string1 using javascript

I write this function but it only worked with one string , 

 contains(input,words) {
      let input1 = input.split(' ');
      for ( var i = 0; i < input1.length; i++ ) { 
      if (input1[i] === words) {
        return true;
      }
      else {
        return false;
        }
      }
     }



let contains = Str.prototype.contains('hello me want coffee','hello');

will return true

how to make it work with several words

let contains = Str.prototype.contains('hello me want coffe',['hello','want']);

Upvotes: 1

Views: 56

Answers (4)

Orelsanpls
Orelsanpls

Reputation: 23505

You can use RegExp to look for the strings. The pro to use RegExp is that you can be case insensitive.

// 'i' means you are case insensitive
const contains = (str, array) => array.some(x => new RegExp(x, 'i').test(str));

const arr = [
  'hello',
  'want',
];

console.log(contains('hello me want coffe', arr));
console.log(contains('HELLO monsieur!', arr));
console.log(contains('je veux des croissants', arr));

Upvotes: 0

Ramesh Rajendran
Ramesh Rajendran

Reputation: 38663

try indexOf() logic

function contains(input, words) {
       length = words.length;
    while(length--) {
       if (input.indexOf(words[length])!=-1) {
          return true;
       }else{
         return false;
       }  
      }  
     }


console.log(contains('hello me want coffe',['hello','want']));

Upvotes: 0

Michał Perłakowski
Michał Perłakowski

Reputation: 92471

You can use the some() method along with the includes() method, instead of your contains():

console.log(['hello', 'want'].some(x => 'hello me want coffe'.includes(x)));
console.log(['hello', 'want'].some(x => 'me want coffe'.includes(x)));
console.log(['hello', 'want'].some(x => 'me coffe'.includes(x)));

Upvotes: 1

Mihai Alexandru-Ionut
Mihai Alexandru-Ionut

Reputation: 48357

You can use some method in combination with split.

let contains = (str, arr) => str.split(' ').some(elem => arr.includes(elem));
console.log(contains('hello me want coffe',['hello','want']))

Upvotes: 0

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