Use yield to return the index if the value is found and update the index, i.
Use a while loop that will terminate the generator as soon as the value returned from Array.prototype.indexOf() is -1.
constindexOfSubstrings=function*(str, searchValue) {let i =0;while(true) {const r = str.indexOf(searchValue, i);if(r !== -1) {yield r;
i = r +1;
}elsereturn;
}
};
[...indexOfSubstrings('tiktok tok tok tik tok tik','tik')];// [0, 15, 23][...indexOfSubstrings('tutut tut tut','tut')];// [0, 2, 6, 10][...indexOfSubstrings('hello','hi')];// []
Written by Angelos Chalaris
I'm Angelos Chalaris, a JavaScript software engineer, based in Athens, Greece. The best snippets from my coding adventures are published here to help others learn to code.
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