CODEWITHSUNDEEP
javascriptarraysgoogle-apps-scriptcompare
Joaquin Pagliettini
Joaquin Pagliettini

Reputation: 29

Compare two arrays and remove items with partial match

I need to compare two arrays for PARTIAL / SUBSTRING matches. If these are found, I want the matching items removed from the originalArray or create a new array with all those items that did not have a partial match,

var originalArray = ['www.google.com/opq', 'www.yelp.com/abc', 'www.yahoo.com/klm', 'www.bing.com/xyz', 'www.google.com/124'];

var itemsToBeRemoved = ['google.com', 'yahoo.com'];

// DESIRED ARRAY: An array with items that did not have a partial match. For example: 
var cleanArray = ['www.yelp.com/abc', 'www.bing.com/xyz']

It work when its a FULL / EXACT match. But it is NOT what I need.

function cleanFullMatch(){ 
// Your main array  
var originalArray = ['www.google.com/rugby', 'www.yelp.com/abc', 'www.yahoo.com/tennis', 'www.bing.com/xyz', 'www.google.com/football']; 
Logger.log(originalArray);
    
// This array contains strings that needs to be removed from main array 
var itemsToBeRemoved = ['www.google.com/rugby', 'www.yahoo.com/tennis', 'www.google.com/football'];

var cleanObj = {};
itemsToBeRemoved.forEach( e => cleanObj[e] = true); 
itemsToBeRemoved.forEach( e => itemsToBeRemoved[e]= true);
    
var cleanArray = originalArray.filter(function(val){   return !cleanObj [val] })
Logger.log(cleanArray);
}

Upvotes: 0

Views: 1206

Answers (2)

Iamblichus
Iamblichus

Reputation: 19309

filter out the elements of the originalArray so that none of the itemsToBeRemoved is present in any of the filtered elements.

There are many ways to check whether a substring is included in another string, as others said, like includes, indexOf and RegExp.

You could then iterate through all of these itemsToBeRemoved in different ways. You could, for example, use some:

function cleanFullMatch(){ 
  var originalArray = ['www.google.com/rugby', 'www.yelp.com/abc', 'www.yahoo.com/tennis', 'www.bing.com/xyz', 'www.google.com/football']; 
  var itemsToBeRemoved = ['google.com', 'yahoo.com'];
  var cleanArray = originalArray.filter(element => !itemsToBeRemoved.some(item => element.includes(item)));
  console.log(cleanArray);
}

Or, alternatively, every:

var cleanArray = originalArray.filter(element => itemsToBeRemoved.every(item => !element.includes(item)));

As you can see, the filtering process can be reduced to a single line.

Upvotes: 1

Nikko J.
Nikko J.

Reputation: 5533

You can use JavaScript RegExp to create regular expression and array.filter(function) to remove elements that does not match the regex.

Sample Code:

function cleanFullMatch(){ 
  // Your main array  
  var originalArray = ['www.google.com/rugby', 'www.yelp.com/abc', 'www.yahoo.com/tennis', 'www.bing.com/xyz', 'www.google.com/football']; 
  Logger.log(originalArray);
  
  // This array contains strings that needs to be removed from main array 
  var itemsToBeRemoved = ['google.com', 'yahoo.com', 'google.com'];
  
  // loop through itemsToBeRemove
  itemsToBeRemoved.forEach(function(rgx){
    
    // convert each element of itemsToBeRemove to regular expression
    var re = new RegExp(rgx);
    
    // filter the array by removing the elements that match the regex
    // test() method checks if the string matches the regex
    originalArray = originalArray.filter( word => !re.test(word));
  });
  
  Logger.log(originalArray);
}

Sample Output:

enter image description here

Upvotes: 1

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