Question

How to find all occurrences of a character in a string. For example string is: “Hello world”
and user want to now the indexes of string where ‘L’ is present. Which is in example 2,3 and 9. How to find indexes like this in java-script/jquery ?

Answer 1

You can try something like the following code, from this answer:

function getIndicesOf(searchStr, str, caseSensitive) {
    var startIndex = 0, searchStrLen = searchStr.length;
    var index, indices = [];
    if (!caseSensitive) {
        str = str.toLowerCase();
        searchStr = searchStr.toLowerCase();
    }
    while ((index = str.indexOf(searchStr, startIndex)) > -1) {
        indices.push(index);
        startIndex = index + searchStrLen;
    }
    return indices;
}