array value by jquery : I have an javascript array that has the following values,

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    let arr = ["2","4","6","8","10"];

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I have a second array that has three integers,

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    let index = [1,5,9];

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How would I use JQuery (or Javascript) to use the array to get the index from arr, and add it to a new array. I want to add these strings to a new array.

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    indexArr = ["1","3","5"]

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Thanks