Check if every single string within an array exists within another string using Javascript and return true if they all do

Question

Check if every single string within an array exists within another string using Javascript and return true if they all do

Trying to determine if a variable contains all the strings from an array has proven trickier than expected. I've attempted various methods, but they all seem overly complex and unsuccessful. Any suggestions would be greatly appreciated.

For example:

var myArray = ["cat","dog","bird"];
var myString = "There is a cat looking the bird and a dog looking the cat";
var myString2 = "There is a cat and a dog looking one each other";

myArray and myString should return true, while myArray and myString2 should return false.

I've been experimenting with something like this:

var selector = "dir.class#id";
var code = '<div id="id" class="class"></div>';
var tokens = selector.split(/[\.,#]+/);

for (var i = tokens.length - 1; i >= 0; i--) {
    var counter = [];
    if (code.indexOf(tokens[0]) > -1 ) {
        counter.concat(true);
    }
}

Thank you!

javascript arrays string comparison

Answer 1

Answer №1

To achieve this, you can use the following code snippet:

const checkWordsInText = function (text, words) {
    return words.every(function(word){
        return text.includes(word);
    });
}

console.log(checkWordsInText(sampleText, sampleArray)); //outputs true
console.log(checkWordsInText(anotherText, sampleArray)); //outputs false

Answer 2

To achieve this, you can use the following code snippet:

const checkWordsInText = function (text, words) {
    return words.every(function(word){
        return text.includes(word);
    });
}

console.log(checkWordsInText(sampleText, sampleArray)); //outputs true
console.log(checkWordsInText(anotherText, sampleArray)); //outputs false

Answer 3

Answer №2

Here's a working example:

 let animals = ["cat", "dog", "bird", "cat"];
 let sentence1 = "There is a cat looking at the bird and a dog looking at the cat";
 let sentence2 = "There is a cat and a dog looking at each other";

 function checkAnimals(arr, str) {
    let count = 0;
    for(let i in arr){
        let value = arr[i];
        if(str.indexOf(value) !== -1) count++;
    }

    return (arr.length === count);
 }

 console.log(checkAnimals(animals, sentence1));

Answer 4

Here's a working example:

 let animals = ["cat", "dog", "bird", "cat"];
 let sentence1 = "There is a cat looking at the bird and a dog looking at the cat";
 let sentence2 = "There is a cat and a dog looking at each other";

 function checkAnimals(arr, str) {
    let count = 0;
    for(let i in arr){
        let value = arr[i];
        if(str.indexOf(value) !== -1) count++;
    }

    return (arr.length === count);
 }

 console.log(checkAnimals(animals, sentence1));

Answer 5

Answer №3

function ensureContainString(array, target){
for(index in array){
    if(target.indexOf(array[index]) == -1)
     return false;
}
 return true;
}

Answer 6

function ensureContainString(array, target){
for(index in array){
    if(target.indexOf(array[index]) == -1)
     return false;
}
 return true;
}

Answer 7

Answer №4

Give this code snippet a shot:

const checkArrayElementsInString = (array, string) => {
  for(let index = 0; index < array.length; index++){
    if(string.indexOf(array[index]) === -1){
      return false;
    }
  }
  return true;
}

Answer 8

Give this code snippet a shot:

const checkArrayElementsInString = (array, string) => {
  for(let index = 0; index < array.length; index++){
    if(string.indexOf(array[index]) === -1){
      return false;
    }
  }
  return true;
}

Answer 9

Answer №5

If you're looking to find matches at the end of words without requiring them to be at the beginning, your best bet is to utilize a regular expression or some other form of processing.

Using indexOf will match the character sequence anywhere within the word, not just at the end. To target strings that appear at the end or as whole words, consider the code snippet below:

    var myArray = ["cat","dog","bird"];
    var myString = "There is a cat looking the bird and a dog looking the cat";
    var myString2 = "There is a cat and a dog looking one each other";
    var myString3 = "There is a classcat and a iddog looking at bird";
    var myString4 = "There is a catclass and a dog looking at bird";

    document.write(myArray.every(function(word) {
      return (new RegExp('\\w*' + word + '\\b').test(myString));
    }) + '<br>');
    document.write(myArray.every(function(word) {
      return (new RegExp('\\w*' + word + '\\b').test(myString2));
    }) + '<br>');
    document.write(myArray.every(function(word) {
      return (new RegExp('\\w*' + word + '\\b').test(myString3));
    }) + '<br>');
    document.write(myArray.every(function(word) {
      return (new RegExp('\\w*' + word + '\\b').test(myString4));
    }));

Answer 10

If you're looking to find matches at the end of words without requiring them to be at the beginning, your best bet is to utilize a regular expression or some other form of processing.

Using indexOf will match the character sequence anywhere within the word, not just at the end. To target strings that appear at the end or as whole words, consider the code snippet below:

    var myArray = ["cat","dog","bird"];
    var myString = "There is a cat looking the bird and a dog looking the cat";
    var myString2 = "There is a cat and a dog looking one each other";
    var myString3 = "There is a classcat and a iddog looking at bird";
    var myString4 = "There is a catclass and a dog looking at bird";

    document.write(myArray.every(function(word) {
      return (new RegExp('\\w*' + word + '\\b').test(myString));
    }) + '<br>');
    document.write(myArray.every(function(word) {
      return (new RegExp('\\w*' + word + '\\b').test(myString2));
    }) + '<br>');
    document.write(myArray.every(function(word) {
      return (new RegExp('\\w*' + word + '\\b').test(myString3));
    }) + '<br>');
    document.write(myArray.every(function(word) {
      return (new RegExp('\\w*' + word + '\\b').test(myString4));
    }));

Check if every single string within an array exists within another string using Javascript and return true if they all do

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

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