Difficulty in finding and retrieving array indexes that match a specific character pattern

Question

Difficulty in finding and retrieving array indexes that match a specific character pattern

Is it possible to return indexes from an array based on a search term, regardless of the order of characters in the array?

const array = ['hell on here', '12345', '77788', 'how are you llo'];

function findMatchingIndexes(arr, searchTerm) {
    const indexArray = [];

    for(let i = 0; i < arr.length; i++) {
        if (searchTerm.charAt(i) <= arr.indexOf(i)) {
            indexArray.push(i);
        }
    }

    return indexArray;
}

document.write(findMatchingIndexes(array, "hello"));

This code should output 0 and 3 as the matching indexes in the array. How would you approach this problem?

arrays function javascript

Answer 1

Answer №1

For those employing jQuery, the grep function could potentially be beneficial. You can learn more about it by visiting this link.

Answer 2

For those employing jQuery, the grep function could potentially be beneficial. You can learn more about it by visiting this link.

Answer 3

Answer №2

Check out this code snippet:

function characterMatch(arr, search) {
    var output = [],
        itemSplit,
        charFound = false;

    // Loop through each item in the array
    for (var i = 0; i<arr.length; i++) {
        charFound = false;
        // Create an array of characters from the current item
        itemSplit = arr[i].split('');
        // Iterate over every character in 'search' string
        for (var j = 0; j<search.length; j++) {
            charFound = false;
            // Iterate over each character in the split array of characters
            for (var k=0; k<itemSplit.length; k++) {
              // If there is a match, set flag to true and exit loop
              if (search.charAt(j) === itemSplit[k]) {
                charFound = true;
                break;
              }
            }
            // If character not found, then break loop
            if (!charFound) {
                break;
            }
            // Remove first character to avoid re-matching
            itemSplit.shift();
        }
        // If 'charFound' is still true by now, it means all chars have been matched
        if (charFound) {
            // Add the current index to the result array
            output.push(i);
        }
    }
    return output;
}

characterMatch(['hello world', '12345', '88999', 'how are you'], 'hello');

Answer 4

Check out this code snippet:

function characterMatch(arr, search) {
    var output = [],
        itemSplit,
        charFound = false;

    // Loop through each item in the array
    for (var i = 0; i<arr.length; i++) {
        charFound = false;
        // Create an array of characters from the current item
        itemSplit = arr[i].split('');
        // Iterate over every character in 'search' string
        for (var j = 0; j<search.length; j++) {
            charFound = false;
            // Iterate over each character in the split array of characters
            for (var k=0; k<itemSplit.length; k++) {
              // If there is a match, set flag to true and exit loop
              if (search.charAt(j) === itemSplit[k]) {
                charFound = true;
                break;
              }
            }
            // If character not found, then break loop
            if (!charFound) {
                break;
            }
            // Remove first character to avoid re-matching
            itemSplit.shift();
        }
        // If 'charFound' is still true by now, it means all chars have been matched
        if (charFound) {
            // Add the current index to the result array
            output.push(i);
        }
    }
    return output;
}

characterMatch(['hello world', '12345', '88999', 'how are you'], 'hello');

Difficulty in finding and retrieving array indexes that match a specific character pattern

Answer №1

Answer №2

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