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/** * Fisher-Yates shuffle ES6 non-mutating implementation. * @param {Array} array the array to shuffle * @return {Array} shuffled array without mutating the initial array. */ export const shuffle = (array: any[]): any[] => { // perform deep clone on array to mutate let cloned = array.slice(0); // array to return let randomizedArray = []; // perform shuffle while (cloned.length !== 0) { let rIndex = Math.floor(cloned.length * Math.random()); randomizedArray.push(cloned[rIndex]); cloned.splice(rIndex, 1); } return randomizedArray; };