Search in an array of objects and return a value from the last corresponding Object in JS-CodePudding

I'm struggling to return a value for last event containing "SearchResults" in the case below: schema of my datalayer where I want to collect the information

At the moment I achieved to write to following code in order to know if a SearchResult event exists or not:

    //Check if an existing event contains Search Results
if (digitalData.event.filter(e => e.componentID === 'SearchResults').length > 0) {    
    // If there are any that exist, I want to take the last one that was generated and return the pageIndex value of that one
    console.log("exist");  
    } else {
        // If it doesn't exist return 1
        return 1;
  };

Now I'm struggling to find a way to select only the last event generated and return the value contained in "digitalData.event.attributes.pageIndex".

Does anyone have any solution regarding this point ?

Thank you,

CodePudding user response：

You could just save that in a variable temporarily and return the last result. Is this what you wanted?

const searchResults = digitalData.event.filter(e => e.componentID === 'SearchResults')
if (searchResults.length > 0) {    
    const yourAnswer = searchResults[searchResults.length -1]
    console.log("exist");  
    } else {
        
        return 1;
  };

CodePudding user response：

Filter the items first, and if there are any take the last item:

const searchResults = digitalData.event.filter(e => e.componentID === 'SearchResults');
if (searchResults.length > 0) {
  // If there are any that exist, I want to take the last one that was generated and return the pageIndex value of that one
  return searchResults[searchResults.length-1].pageLength;
} else {
  // If it doesn't exist return 1
  return 1;
};

CodePudding user response：

Hello bro you can do what you want in this way.

let getResult = digitalData.event.filter(e => e.componentID === 'SearchResults' && e.componentID.length > 0 )
  
    if (getResult.length > 0) {
    const getIt = getResult[getResult.length - 1];
    getResult = getIt
    } 

    console.log(getResult)